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2284 results about "Electron bunches" patented technology

High-strength hydrogen embrittlement-resistant layered metal composite material for hydrogen storage as well as preparation method and application thereof

The invention belongs to the technical field of metal composite materials and hydrogen storage and transportation materials, and particularly relates to a high-strength hydrogen-embrittlement-resistant layered metal composite material for hydrogen storage and a preparation method and application of the high-strength hydrogen-embrittlement-resistant layered metal composite material. According to the preparation method, the nickel-saving austenitic stainless steel (NEASS) and the 30CrMo steel are alternately overlapped in a multi-layer mode, and the processes of vacuum electron beam welding, high-temperature hot rolling, accumulative ply rolling, multi-stage heat treatment and the like are combined, so that the composite board with the layer number reaching hundreds of layers, firm interface bonding, excellent mechanical performance and good hydrogen embrittlement resistance is prepared; the technical problem that strength, toughness and hydrogen brittleness resistance of an existing metal material in a high-pressure hydrogen environment are difficult to consider at the same time is solved. The obtained composite material has high strength, high plasticity and excellent hydrogen embrittlement resistance, and is suitable for structural materials of high-pressure hydrogen storage tanks, hydrogen conveying pipelines and other key hydrogen energy equipment.
Owner:NORTHEASTERN UNIV CHINA

Molybdenum ditelluride / nickel ditelluride heterojunction-based photoelectric detector and preparation method and application thereof

The invention belongs to the technical field of photoelectric detection, and discloses a molybdenum ditelluride / nickel ditelluride heterojunction-based photoelectric detector and a preparation method and application thereof, and the molybdenum ditelluride / nickel ditelluride heterojunction-based photoelectric detector is prepared by stripping single crystal molybdenum ditelluride onto an oxide layer silicon substrate through a mechanical stripping method to obtain a molybdenum ditelluride nanosheet; a nickel ditelluride nanosheet is obtained through a chemical vapor deposition method; the molybdenum ditelluride nanosheet is transferred to the nickel ditelluride nanosheet through a PVA dry transfer method to form an overlapped part, and a molybdenum ditelluride / nickel ditelluride heterojunction is formed; and preparing electrodes at two ends of the molybdenum ditelluride / nickel ditelluride heterojunction through electron beam evaporation or thermal evaporation. The photoelectric detector utilizes a built-in electric field generated by a two-dimensional material heterojunction interface to effectively improve the photoelectric conversion efficiency and response speed of a visible light wave band.
Owner:GUANGDONG UNIV OF TECH

A method of composite additive manufacturing of metal matrix composites

The present application relates to the technical fields of laser additive manufacturing, and discloses a kind of metal matrix composite composite additive manufacturing methods, comprising: the mixing of pre-prepared composite powder, substrate pretreatment, laser bottom layer cladding preparation bottom layer structure;Electron beam selective melting additive preparation main functional layer, obtain rough parts;Rough parts post-processing.The present application improves the wettability between metal matrix and TiC reinforcing phase through the transition effect of laser cladding bottom layer and hot isostatic pressing post-processing, improves the interface bonding strength, avoids the interface peeling problem under load;Through laser cladding, realize rapid bottom layer forming, electron beam selective melting ensures high-precision functional layer manufacturing, and is suitable for the integrated manufacturing of complex structure (such as hollow, thin-walled) metal matrix composite parts.
Owner:天津滨海雷克斯激光科技发展有限公司

P-type tellurium oxide thin film field effect transistor and preparation method thereof

The invention discloses a P-type tellurium oxide thin film field effect transistor and a preparation method thereof. The transistor is provided with a bottom gate top contact structure. The preparation method comprises the following steps: firstly, cleaning the silicon / silicon dioxide substrate, then depositing a tellurium oxide film as the semiconductor active layer by using a metal mask and an electron beam evaporation method, and finally preparing a layer of nickel with the thickness of about 50nm on the active layer by using the mask to serve as the source electrode and the drain electrode. Compared with a traditional tellurium oxide transistor, the tellurium oxide transistor prepared by the method has the advantages that the carrier mobility and the switching ratio are obviously improved, and the hysteresis effect can be ignored. The electrical performance of the tellurium oxide transistor with the bottom gate top contact structure is improved, and the tellurium oxide transistor has the advantages of being low in cost and simple in process step.
Owner:FUDAN UNIVERSITY

Pattern inspection system and method of pattern inspection using the same

Provided is a pattern inspection system, including a scanning electron microscope (SEM) including an electron gun configured to generate a first electron beam and emit the generated first electron beam toward a first wafer, a detector configured to detect electrons emitted from the first wafer based on the first electron beam emitted toward the first wafer, and at least one processor configured to generate a first SEM image including a plurality of pixels based on the detected electrons, and determine, based on a period of a pattern extracted from the first SEM image, a pixel size of a second SEM image to be generated by the SEM with respect to a second wafer.
Owner:SAMSUNG ELECTRONICS CO LTD

Micro-positive pressure hydrogen environment in-situ stress-strain testing device and method

The invention discloses a micro-positive pressure hydrogen environment in-situ stress-strain testing device and method. The device comprises a sealed reaction cavity which can be placed in a scanning electron microscope sample cabin; the loading device is arranged in the cavity and is used for fixing and applying a load; the atmosphere control system is communicated with the cavity and is used for introducing gas and maintaining a micro-positive pressure state; an electron transmission window arranged on the cavity, wherein an electronic transparent film packaged by the electron transmission window can maintain air tightness under micro-positive pressure and allows electron beams to penetrate through; and the heating module is arranged in the cavity. The method comprises the following steps: loading and sealing a sample, establishing a micro-positive pressure atmosphere, heating the sample, starting loading, and synchronously carrying out SEM real-time imaging and data recording. The problem that a traditional SEM in-situ device cannot work in a real micro-positive pressure hydrogen and high-temperature environment is solved, and synchronous visual in-situ observation of material microstructure evolution and macromechanical response under the gas-heat-force multi-physics field coupling condition is achieved.
Owner:TAIHANG NATIONAL LABORATORY

Device and method for detecting vacuum degree of vacuum arc-extinguishing chamber

PendingCN121409505AVacuum gauge using radiometer actionHigh-tension/heavy-dress switchesHigh-voltage direct currentParticle physics
The invention relates to the technical field of high-voltage electric appliance detection, in particular to a device and method for detecting the vacuum degree of a vacuum arc-extinguishing chamber, and the method comprises the steps: arranging a field emission cathode on one metal end cover of the vacuum arc-extinguishing chamber; an anode is arranged on the metal shielding cover close to the field emission cathode in the vacuum arc-extinguishing chamber; the high-voltage direct-current power supply is connected to the field emission cathode and the anode and is used for applying voltage to the electrodes so as to drive the field emission cathode to emit electron beams to impact the anode; the X-ray energy spectrum detector directly faces the anode, the X-ray energy spectrum detector is used for measuring bremsstrahlung X-ray energy spectrum generated when the electron beam impacts the anode, an electron emission source is actively arranged in the arc extinguish chamber, and the distribution of the X-ray energy spectrum generated by the electron emission source is measured. And high signal-to-noise ratio, high-precision and high-sensitivity vacuum degree quantitative detection is realized by utilizing the strong correlation between the energy spectrum form and the internal gas pressure.
Owner:GUIZHOU POWER GRID CO LTD +1

Interlocking protection optimization system and method of FLASH accelerator and electronic equipment

The invention provides an interlocking protection optimization system and method of a FLASH accelerator and electronic equipment, and the system comprises an acceleration module which is used for generating an initial electron beam and accelerating the initial electron beam to obtain a high-energy electron beam; the beam quality guarantee module is in signal connection with the acceleration module and is used for monitoring, regulating and controlling the intensity and the position of the high-energy electron beam in real time; the treatment execution module is in signal connection with the beam quality guarantee module and is used for converting the high-energy electron beams into treatment rays and monitoring the output dose of the treatment rays in real time; and a safety interlocking protection module which is in signal connection with the acceleration module, the beam quality guarantee module and the treatment execution module and is used for collecting operation parameters of all parts of the FLASH accelerator in real time, performing analysis based on preset logic, triggering interlocking protection actions under abnormal working conditions, and controlling the treatment execution module to perform treatment. And active monitoring-intelligent analysis-rapid response closed-loop control of the ultrahigh dose rate radiotherapy accelerator in a full operation period is realized.
Owner:ZHONGJIU FLASH MEDICAL TECHNOLOGY CO LTD

Electron energy spectrometer, electron energy spectrum measuring method and electron energy spectrum measuring system

PendingCN121978740AOvercoming signal pile-up problemsOvercome inherent inefficienciesX-ray spectral distribution measurementLight spotElectron spectroscopy
The invention relates to the technical field of electron energy measurement, and discloses an electron spectrometer and an electron energy spectrum measurement method and system.The electron spectrometer comprises a magnetic deflection unit used for receiving an incident to-be-measured electron beam, generating a magnetic field and applying the magnetic field to all to-be-measured electrons in the to-be-measured electron beam; the scintillator fluorescent screen is arranged at the downstream of the magnetic deflection unit and used for receiving the deflected electrons to be detected, and the electrons bombard the scintillator fluorescent screen and generate light spots; the optical acquisition unit is used for acquiring a light spot image on the scintillator fluorescent screen; and the signal processing unit is used for processing the light spot image so as to identify the spatial position information of the light spot in the light spot image and convert the spatial position information into electronic energy data. The method has the beneficial effects that the unification of high resolution and high measurement efficiency is realized, and the problem of signal accumulation under a high counting rate of a traditional direct measurement method and the inherent defect of low efficiency of a scanning type magnetic spectrometer are overcome.
Owner:SHENZHEN TECH UNIV

Calibration method of electron beam measuring equipment and related product

The invention provides a calibration method of electron beam measuring equipment and a related product. The calibration method comprises the following steps: acquiring an initial scanning image of a wafer acquired by the electron beam measurement equipment at an initial position in a preset view field; controlling the wafer to move for a preset distance along a preset direction, and acquiring a translation scanning image acquired for the wafer under the condition of keeping the preset field of view unchanged; determining a first position coordinate of each positioning mark in the initial scanning image and a second position coordinate of each positioning mark in the translation scanning image; obtaining a distortion model of the electron beam measurement equipment according to the displacement of the second position coordinates and the first position coordinates of the positioning marks in the preset direction; and calibrating the electron beam measuring equipment by using the distortion model. According to the method, the distortion degree of the scanned image of the electron beam measurement equipment can be reduced, and the measurement precision of the electron beam measurement equipment is improved.
Owner:DONGFANG JINGYUAN ELECTRON LTD

Method for rapidly detecting OverHang of positive electrode and negative electrode of laminated battery

The invention discloses a method for rapidly detecting OverHang of a positive electrode and a negative electrode of a laminated battery, and relates to the technical field of laminated battery detection.The method comprises the steps that a micro-focus X-ray tube is properly modified, and an electron beam deflection system is installed; the electron beam deflection system realizes electron beam deflection scanning by controlling the current of a deflection magnetic field coil by a remote computer through a communication serial port; the laminated battery is positioned in a reference coordinate system of the detection platform through the clamping tool, it is ensured that the angular position of the battery and the relative position of the X-ray source are kept consistent during detection each time, the X-ray source and the detector are relatively fixed, and multi-angle projection is achieved through electron beam deflection. According to the method for rapidly detecting the OverHang of the positive electrode and the negative electrode of the laminated battery and the method for controlling the deflection of the electron beam to generate the multi-view projection X-ray by the change of the electromagnetic field, a multi-view two-dimensional picture of the laminated battery is obtained, the OverHang data of the laminated battery can be conveniently and rapidly obtained without a complex CT (Computed Tomography) method, and the method has high application value.
Owner:HEFEI YINGNUOKE INSTRUMENT CO LTD

High-flux electron beam quality cooperative control system and method

The invention discloses a high-flux electron beam quality cooperative control system and method, belongs to the technical field of electron beam control, and aims to solve the problems that the beam intensity and quality are difficult to consider, the subsystem collaboration is poor and the stability is insufficient. The cooperative control module is in communication connection with the sensing module and is used for receiving the state parameters, analyzing the state parameters based on a preset multi-target optimization algorithm and generating a cooperative control instruction, and the execution module is in communication connection with the cooperative control module and is used for receiving the cooperative control instruction and executing the cooperative control instruction according to the cooperative control instruction. Cooperative control of beam intensity and quality is realized. Through a multi-objective optimization algorithm, the limitation of traditional single parameter control is broken through, the beam intensity is larger than or equal to 100 mA, the emittance is smaller than or equal to 5 pi mm mrad and the energy dispersion is smaller than or equal to 0.5% can be achieved at the same time, and the technical problem that the beam intensity and the emittance are difficult to consider is solved.
Owner:SHANGHAI SINOTEX HIGH ENERGY TECH

Wear-resistant environment-friendly PET base material adhesive tape and preparation method thereof

PendingCN121736643ABio-packagingFilm/foil adhesivesTripropylene glycolElastomer
The invention discloses a wear-resistant environment-friendly PET base material adhesive tape and a preparation method thereof, and belongs to the technical field of adhesive tapes, raw materials comprise a PET adhesive tape film and an EB curing modified adhesive, the surface of the modified PET adhesive tape film subjected to corona treatment is coated with the EB curing modified adhesive, then electron beam radiation curing is carried out, the absorbed dose of electron beams is 38-42 kGy, and the EB curing modified adhesive is prepared. And then cooling, rolling and curing to obtain the wear-resistant environment-friendly PET base material adhesive tape. The modified PET adhesive tape film is prepared from the following raw materials: PET resin and modified polyolefin elastomer master batch; the EB curing modified adhesive is prepared from the following raw materials: butyl acrylate, 2-ethylhexyl acrylate, tripropylene glycol diacrylate, acrylate resin, urethane acrylate and starch modified core-shell microsphere powder. According to the mode, a modification process is added in the preparation process of the PET adhesive tape film and the adhesive, and finally the environment-friendly PET base material adhesive tape with excellent comprehensive performance is prepared.
Owner:佛山市奥川顺新材料实业有限公司

Inspection system

This inspection system 100 comprises: an electron source 102 which irradiates a sample 200 with an inspection beam; a detector 105 which detects secondary electrons obtained by irradiating the sample 200 with the inspection beam and outputs a detection signal; a laser device 107 which emits an action laser that changes the amount of secondary electrons; an electron gun 106 which emits an action electron beam that changes the amount of secondary electrons; and a computer system 140 which generates an image of the sample 200 on the basis of the detection signal. The computer system 140 generates an inspection image I1 related to the emission of the inspection beam, acquires the dimensions and the like related to a pattern on the sample 200 on the basis of the inspection image I1, generates an inspection image I2 related to the emission of the action laser and the inspection beam, acquires the material characteristics related to the pattern on the basis of the inspection image I2, generates an inspection image I3 related to the emission of the action electron beam and the inspection beam, and acquires the electrical characteristics related to the pattern on the basis of the inspection image I3.
Owner:HITACHI HIGH TECH CORP

Process for providing low gloss coatings

The present invention relates to a process for producing a coating from an aqueous, radiation-curable coating composition, wherein the process comprises the steps in the sequence (1) to (4):(1) applying an aqueous, radiation-curable coating composition on a surface of a substrate,(2) drying the aqueous, radiation-curable coating composition, affording an at least partially dried coating composition,(3) irradiating the at least partially dried coating composition with UV light having a wavelength s 220 nm under inert atmosphere, followed by(4) irradiating with UV light having a wavelength 300 nm or with E-beam,wherein the aqueous, radiation-curable coating composition is a dispersion comprising:(A) at least one water-dispersible polyurethane (A), wherein the polyurethane (A) has a urea group (—NH—CO—NH—) concentration of at least 0.1 milli-equivalents per g of polyurethane (A) and of at most 2.6 milli-equivalents per g of polyurethane (A) and the polyurethane (A) is essentially free of radiation-curable, ethylenically unsaturated bonds,(B) at least one radiation-curable diluent (B) with a molar mass less than 750 g / mol and with an acrylate functionality of from 2 to 5, and(C) water and optionally organic solvent, whereby the optional organic solvent is present in an amount of at most 30 wt. %, based on the total amount of water and organic solvent,whereinthe amount of (A) is from 30 to 85 wt. % and the amount of (B) is from 15 to 70 wt. %,based on the total amount of (A) and (B).
Owner:COVESTRO NETHERLANDS BV

Dynamic regulation and control device and method for aluminum alloy electron beam welding residual stress

The invention discloses a dynamic regulation and control device and method for aluminum alloy electron beam welding residual stress, and belongs to the technical field of electron beam machining, and the device integrates a multi-sensing information acquisition system, a vibration system and a control system. The sensing information acquisition system measures the surface residual stress of a welding seam and a heat affected zone in real time and in situ in the welding process through a vacuum compatible X-ray probe and a detector, compares the predicted stress with a target value, and generates a regulation and control instruction of electron beam welding parameters through the control system; the electron beam welding behavior is adjusted in real time to dynamically control stress, and the vibration system is used for applying high-frequency micro-amplitude vibration to a local high-stress area of a weldment to promote residual stress release. The device integrates monitoring, regulation and stress release functions in a vacuum environment, can remarkably reduce welding residual stress and improve welding seam quality, and is particularly suitable for electron beam welding of large thin-wall aluminum alloy structural parts.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS

Electron beam melting wire liquid nitrogen cryogenic additive manufacturing method and system

The invention belongs to the related technical field of additive manufacturing, and discloses an electron beam melting wire liquid nitrogen copious cooling additive manufacturing method and system.The method comprises the steps that in the electron beam melting printing forming process, liquid nitrogen is sprayed to a molten printing wire under electron beam irradiation, and the liquid nitrogen is sprayed to the molten printing wire; the molten printing wires are subjected to nitridation reaction under the action of electron beams while being subjected to liquid nitrogen cryogenic cooling, so that the crystal structure of a formed part is regulated and controlled, and the mechanical performance is enhanced; and / or liquid nitrogen is sprayed to the printing wire material which begins to be solidified, so that the printing wire material is subjected to liquid nitrogen deep cooling, and the crystal structure of the formed part is regulated and controlled to achieve mechanical property enhancement. Liquid nitrogen is introduced into the electron beam additive manufacturing device for deep cooling, the extruded printing wire is solidified at an extremely high cooling speed after being melted, a large number of homogeneous nucleation sites are formed in a melting area due to the high supercooling degree, the solidification speed is high, a microstructure is customized into uniform and fine equiaxed crystals, the strength and toughness of the material are improved, and the production cost is reduced. The mechanical property is improved.
Owner:HUAZHONG UNIV OF SCI & TECH

Method for improving size precision and surface quality of Nb521 alloy formed through electron beam selective melting

The invention discloses a method for improving size precision and surface quality of Nb521 alloy formed through electron beam selective melting. The method comprises the steps that firstly, a three-dimensional model of the Nb521 alloy is stretched in the height direction, slicing and layering are conducted, each single slicing layer is divided into an inner area and an outer area, and data of each slicing layer are obtained; secondly, spherical Nb521 pre-alloyed powder is added, and data of all cutting layers are imported; 3, after powder spreading, scanning and melting in different areas to form a first single-layer solid sheet layer; and 4, powder spreading and melting processes are repeated. According to the method, through height stretching pre-compensation cooling shrinkage of the Nb521 alloy three-dimensional model, a single cutting layer is divided into a surface area and an internal area, double-concentric-square-shaped contour scanning is conducted on the surface area, snakelike continuous scanning, negative defocusing and corner dynamic adjustment are conducted on the internal area, the forming quality and efficiency are guaranteed, and the method is suitable for large-scale production. And the size precision and the surface quality of the Nb521 alloy part are improved, and the method is suitable for manufacturing Nb521 alloy complex structural parts.
Owner:NORTHWEST INSTITUTE FOR NONFERROUS METAL RESEARCH

Titanium alloy component single-sided entry double-layer weld one-time forming electron beam welding method

The application provides a one-time forming electron beam welding method for a titanium alloy component with single-sided incidence and double-layer welds, which comprises the following steps: a closed cavity structure titanium alloy component is formed by a plurality of mutually shielded multi-layer thin plates through single-direction electron beam incidence; the focusing current of the electron beam is adjusted; the converging effect of the electromagnetic coil is changed to change the focus position, and then the electron beam keyhole depth and size are changed; the keyhole is adjusted to be an energy channel through which the electron beam passes; the electron beam energy can pass through the first layer of welds to reach the second layer of welds; the controllable linear energy is provided by combining the acceleration voltage, the welding current and the welding speed to ensure that the remaining energy that penetrates reaches the second layer of welds to complete the welding of the second layer of welds again; the low-frequency scanning is combined with the electron beam movement to drive the first layer of molten pool metal to flow and fill the rear channel, and the front channel is opened, so that the channel is dynamically smooth and stable, and the electron beam keyhole effect behavior is adjusted.
Owner:SHENYANG AIRCRAFT CORP

Method for realizing multi-polarization high numerical aperture Laplace differentiator based on metasurface

The invention discloses a method for realizing a multi-polarization high-numerical aperture Laplace differentiator based on a metasurface, and belongs to the technical field of micro-nano photonics, optical simulation calculation and light field regulation and control. The single-layer metasurface is composed of a cylindrical array which is made of an amorphous silicon material and has a hexagonal lattice period. Geometric parameters of a silicon cylinder are designed and selected, so that the metasurface excites resonance spectrums with large-angle dispersion capability under illumination of p polarized light and s polarized light in the same working wavelength range, and an optical transfer function required by optical Laplacian differential operation with broadband and high numerical aperture is realized in a real airspace; and Laplacian operation can be executed under non-polarized light and non-coherent light conditions. And generating a processing file of the corresponding metasurface according to the determined geometric dimension of the silicon cylinder unit. And processing the dielectric metasurface by adopting a micro-nano processing technology of electron beam etching. In a working wave band, the metasurface can directly obtain two-dimensional second-order edge contour information of a target image under various illumination conditions.
Owner:BEIJING INST OF TECH

Device and method for high power-density thermionic energy conversion

ActiveUS12603266B2Pulse generation by vacuum tubesElectric discharge tubesThermionic emissionThermal electron
Thermionic generators are described herein that include a variety of features that allow the devices to efficiently and effectively convert large amounts of thermal energy directly to electrical energy, such as in the form of currents and / or voltages. For example, the thermionic generators can be used to generate an electron beam from a thermionic emission device, and focus or shape the electron beam in such a way that allows the energy of electrons in the electron beam to be captured and converted to electrical energy.
Owner:SPACE CHARGE LLC

System and method for using metal-wrapped carbon-containing powders in a vacuum induction melting furnace

A vacuum induction melting (VIM) furnace and method of using. A VIM is configured for use with metal-containing carbon powders. In operation, the metal-containing carbon powders are formed into a pellet so as to minimize or eliminate ejection of material during introduction of the pellet into the VIM processor. The VIM processor may be substituted or used in combination with a vacuum arc melt processing apparatus, an electron beam melt furnace, an ion plating furnace, a plasma flame source, a smelter, a traditional metal-metal melt furnace, or any equivalent. Pelletizing can be accomplished through use of a press or through application of any pelletizing technique and / or use of any apparatus that is able to generate pellets that have sufficient mass to avoid ejection from a VIM processor.
Owner:LYTEN INC

Memristor and preparation method thereof

The invention relates to a memristor and a preparation method thereof. The preparation method comprises the following steps: providing an insulating substrate with a bottom electrode formed on the surface; depositing an aluminum oxide thin film on the bottom electrode by adopting electron beam evaporation under a room temperature condition to form a resistive function layer, and not performing high-temperature annealing treatment after deposition is completed, so that a primary oxygen vacancy defect is reserved in the thin film; and then depositing a top electrode on the resistive function layer through thermal evaporation or electron beam evaporation to obtain the memristor. The resistive function layer is an aluminum oxide film which is not densified through annealing, and internal defects of the resistive function layer provide a channel for metal ion migration, so that the reversible resistive characteristic is achieved. The memristor device is simple in structure and suitable for normal-temperature process preparation, the stable resistance switching behavior can be achieved, excessive densification of a film layer and thermal damage of an ITO electrode interface caused by high-temperature annealing are avoided, and the memristor has high cycle durability and nonvolatile data retention capacity and has the stable bipolar resistance change characteristic.
Owner:NINGBO UNIV +1

Moisture-absorbing antibacterial deodorant polyester fiber fabric and preparation method thereof

The invention discloses a moisture-absorbing, antibacterial and deodorizing polyester fiber fabric and a preparation method thereof, belongs to the technical field of fiber fabric preparation, and aims to solve the technical problem that the antibacterial and deodorizing performance and moisture-absorbing performance of a polyester fiber fabric in the prior art need to be further improved. The preparation method specifically comprises the following preparation steps: adding the polyethylene glycol terephthalate, the antibacterial modified filler and the auxiliary additive into a double-screw extruder, and carrying out melt spinning to obtain the antibacterial polyester fiber. The antibacterial modified filler is prepared, the filler and polyethylene glycol terephthalate are blended, melted and spun, antibacterial polyester fibers are prepared, quaternary ammonium salt type antibacterial monomers and sulfonate type hydrophilic monomers are grafted through alkalization treatment and the electron beam irradiation technology, the antibacterial and deodorization performance of the fiber fabric is improved, and the antibacterial and deodorization functions of the fiber fabric are improved. The moisture absorption performance is also improved.
Owner:ANHUI QIANWEI NEW MATERIAL TECH CO LTD

Cooling device suitable for high-power rays

ActiveCN121487095ACooling arrangementAcceleratorsParticle acceleratorRadiation leakage
The invention relates to the technical field of cooling of particle accelerators and nuclear power equipment, and discloses a cooling device suitable for high-power rays, which comprises an absorber assembly, a cooling water system assembly, a vacuum tube assembly, a shield assembly and a support assembly. The absorber assembly is formed by welding internal graphite and external copper through a brazing process, and air holes penetrating to a graphite layer are formed in the copper and communicated with an air cavity in the graphite to form a vacuum sealing cavity. The cooling water system assembly comprises a water segregator with two layers of water inlet ring cavities and two layers of water outlet ring cavities, and uniform flow distribution is ensured. And the absorber cooling water pipe is embedded into the copper and is connected with the U-shaped pipe to form a cooling loop. The electron beam bombards the graphite to generate heat, and the heat is transferred to the copper and taken away by cooling water in the cooling water pipe embedded in the copper. The shield assembly is arranged around the vacuum tube assembly to prevent radiation leakage. The cooling device realizes effective heat dissipation of 8GeV high-power rays, and has excellent radiation resistance and extremely long fatigue life.
Owner:SHANGHAI INSTITUTE OF APPLIED PHYSICS CHINESE ACADEMY OF SCIENCES

Method for efficiently generating high-brightness gamma radiation

The invention discloses a method for efficiently generating high-brightness gamma radiation, and belongs to the technical field of radiation. A relativistic electron beam is injected into the porous microstructure foam target material, and high-brightness gamma ray radiation is generated. According to the method, the used device is simple, only the single relativistic electron beam and the porous microstructure foam target material are needed to interact, compared with a traditional uniform-density solid material, the energy conversion efficiency in the interaction process of the electron beam and a substance can be remarkably improved, and the energy conversion efficiency can be remarkably improved through the effective constraint effect of a high-intensity magnetic field. And the problems of low energy conversion rate, low light source brightness, poor radiation directivity, complex device or difficulty in experiment implementation and the like of the existing high-energy gamma ray radiation source are solved.
Owner:SHENZHEN TECH UNIV

Vacuum electron beam welding method for titanium alloy structural part

The invention discloses a vacuum electron beam welding method for a titanium alloy structural part, and belongs to the technical field of aero-engine manufacturing. The method comprises the following steps: cleaning stains on the surface of a to-be-welded structural member; an oxidation film on the surface of the to-be-welded structural part is cleaned, and a by-product layer formed when the oxidation film is cleaned is removed in a mechanical mode; residual pollutants generated when the surface of the to-be-welded structural part is cleaned in a mechanical mode are removed, and pre-welding cleaning is completed; when the cleaned structural part to be welded is placed in a vacuum chamber of a vacuum electron beam welding machine to be welded, small-beam preheating is conducted firstly; formal welding is carried out according to pre-optimized welding parameters, and electron beam dynamic deflection is increased in the welding process. The method can reduce air hole defects in welding seams, improve the comprehensive mechanical performance of welding joints, and meet the design requirements of aeroengine component welding joints.
Owner:AECC AVIATION POWER CO LTD

Low-smoke halogen-free irradiation crosslinking polyolefin cable sheath material and granulation process thereof

The invention relates to the technical field of high polymer materials, and discloses a low-smoke halogen-free irradiation crosslinking polyolefin cable sheath material and a granulation process thereof, the raw materials comprise an ethylene-vinyl acetate copolymer, an ethylene-octylene copolymer, an epoxy group-containing terpolymer and functionalized composite powder, the powder system superfine aluminum hydroxide is subjected to high-temperature grafting through vinyl silane, after cooling, an active coating layer is constructed by zinc methacrylate, active magnesium oxide and a lubricant, and the process adopts matrix resin main feeding, powder side feeding and low-temperature low-shear extrusion, and is subjected to air-cooled die surface hot cutting and electron beam irradiation crosslinking forming. The covalent bond and ionic bond synergistic enhancement mechanism is utilized, the contradiction between mechanical property loss and processing rheological property deterioration is solved under the high filling amount of 137-160 parts, the active components are effectively prevented from being scorched in the early stage, and the material is endowed with excellent tensile strength, elongation at break and surface quality.
Owner:XINJIANG JIANGLI ELECTRIC POWER TECHNOLOGY CO LTD

Method for preparing Ti80 titanium alloy slab ingot based on vacuum consumable electrode furnace and electron beam cold bed furnace duplex process

The invention discloses a method for preparing a Ti80 titanium alloy slab ingot based on a vacuum self-consuming furnace and electron beam cold bed furnace duplex process, which adopts the duplex process of VAR pre-alloying and EB smelting ingot forming, performs component homogenization through vacuum self-consuming, optimizes a material distribution mode in an electron beam cold bed furnace and process parameters to control element volatilization, and improves the quality of the Ti80 titanium alloy slab ingot. According to the method, the VAR component uniformity advantage and the EB purification and direct ingot forming advantages are integrated, the subsequent Ti80 titanium alloy plate preparation process can be shortened, and the carbon emission and the production cost can be reduced.
Owner:宝武特种冶金有限公司 +1

Fusion reactor tungsten-based dust electron beam melting tritium removal and solidification recovery system

The invention provides a fusion reactor tungsten-based dust electron beam melting tritium removal and solidification recovery system, and particularly discloses a metal dust recovery system which comprises a fusion reactor main machine vacuum chamber and a dust collecting and feeding unit, the dust collecting and feeding unit is connected with the fusion reactor main machine vacuum chamber, and the fusion reactor main machine vacuum chamber is connected with the fusion reactor main machine vacuum chamber. The dust collecting and feeding unit is connected with the fusion reactor main machine vacuum chamber and used for collecting dust generated by the fusion reactor main machine vacuum chamber, the high-temperature deuterium removal smelting treatment unit is connected with the dust collecting and feeding unit and used for treating the dust collected by the dust collecting and feeding unit, and the solid ingot block transferring and storing unit is connected with the high-temperature deuterium removal smelting treatment unit. And the solid ingot transferring and storing unit is connected with the high-temperature deuterium removal smelting treatment unit and used for transferring and / or storing the dust treated by the high-temperature deuterium removal smelting treatment unit, and the metal dust recycling system is efficient and safe.
Owner:聚变新能(安徽)有限公司