105 results about "Metal microstructure" patented technology

The invention relates to the field of pipeline welding, in particular to a prediction model construction method, system and equipment of a heat affected zone and a prediction method. The method comprises the steps that phase change parameters of a metal microstructure phase change model are corrected based on a thermal simulation test; building a heat affected zone microstructure finite element prediction model according to the circumferential weld simulation calculation finite element model; and correction is carried out based on a heat affected zone hardness test and a small punch test correlation parameter correction method, and the heat affected zone strength prediction model is trained by using the expansion database to obtain the pipeline welding joint heat affected zone strength prediction model. Based on a material performance determination test, a finite element model construction method and a finite element model expansion database mode, the accuracy of the heat affected zone strength prediction model is greatly improved, the research cost is reduced, the prediction from a microstructure to macroscopic performance is realized, and the method is suitable for popularization and application. And the defect that the softening mechanism of the hot area material cannot be clarified by traditional macroscopic mechanical property test analysis is overcome.

The invention belongs to the technical field of superconducting wires, and relates to a niobium-tin composite superconducting wire and a preparation method thereof. The invention provides a Nb3Sn composite superconducting wire. The Nb3Sn composite superconducting wire sequentially comprises an Nb3Sn superconducting wire core, a barrier layer, a stable layer, a transition layer, a substrate layer and a functional layer from inside to outside, the transition layer is formed by mixing copper and a dielectric polymer, and the copper content is continuously decreased in a gradient manner from inside to outside; the substrate layer is the dielectric polymer; the functional layer is a plurality of protruding metal microstructures. According to the invention, the functional layer with the broadband electromagnetic stealth function is integrated on the basis of the Nb3Sn superconducting wire rod, so that the radar cross section is obviously reduced while the Nb3Sn superconducting wire rod bears high-density superconducting current and generates a strong magnetic field, and the technical problem that a high-field superconducting magnet system is easy to detect in an electromagnetic environment is solved.

The invention discloses a metasurface structure for realizing terahertz up-conversion luminescence, and belongs to the technical field of optics, the metasurface structure comprises a silicon dioxide substrate, a metal microstructure unit and a quantum dot luminescent material, and is innovatively provided with a dielectric isolation layer and a surface plasma enhancement layer, the dielectric isolation layer reduces the quenching effect of metal on quantum dots, and the surface plasma enhancement layer enhances the surface plasma on the quantum dots. The surface plasma enhancement layer enhances a local electric field. The metasurface structure for realizing terahertz up-conversion luminescence can effectively improve the terahertz visible light up-conversion efficiency, realizes high-sensitivity and quick-response terahertz detection at room temperature, improves the detection sensitivity, simplifies a detection system, has a wide application prospect in the fields of biomedicine, security inspection, communication and the like, and has a wide application prospect in the fields of biomedicine, security inspection, communication and the like. And the practical application development of the terahertz technology is promoted.

This invention discloses an enhanced lead-salt uncooled mid-wave infrared detector and its fabrication method, relating to the field of photoelectric detection technology. The detector comprises: a substrate, a reflective layer, a dielectric layer, a microstructure array layer, a lead-salt sensitive layer, a metal electrode layer, and a passivation layer. The fabrication method includes: fabricating a metal reflective layer on the substrate surface; fabricating a resonant cavity layer on the reflective layer; fabricating a microstructure array layer on the resonant cavity layer; fabricating a lead-salt sensitive layer on the microstructure array layer; sensitizing the lead-salt sensitive layer; fabricating a metal electrode on the lead-salt sensitive layer; and fabricating a passivation layer on the lead-salt sensitive layer and the metal electrode. The beneficial effect of this invention is that it combines the LSPR effect of the resonant cavity and the artificial plasmon resonance array (i.e., the metal microstructure array), which can effectively enhance the mid-wave infrared radiation absorption of the device. It has the characteristics of high performance, high sensitivity, and high stability, and is expected to be widely used in the field of mid-wave infrared detection.

The invention discloses a reconfigurable quantum heuristic metasurface. The metasurface is formed by regularly arranging discrete circular units in a two-dimensional space according to a set period, and each element atom is composed of three layers of metal microstructures, a substrate for supporting and connecting the microstructures, and a square metal backboard. The distances between the centers of any adjacent element atoms along the x-axis and the y-axis are the same, a minimum gap is kept, and each element atom is allowed to rotate freely. By adjusting the rotation angles of the three layers of metal microstructures, the unit can convert circularly polarized incident waves into any polarized reflected waves, so that accurate regulation and control of electromagnetic waves are realized. The reconfigurable quantum heuristic metasurface provided by the invention can simulate the characteristics of quantum bits through a specific regulation and control strategy, shows unique superposition and inseparability, and provides excellent information processing capability. In addition, the metasurface has high flexibility and reconfigurability, and can be dynamically adjusted as required to adapt to different application requirements.

The invention discloses a visible-infrared transparent broadband microwave absorption light window based on multi-resonance, and belongs to the field of optical transparent electromagnetic shielding and microwave absorption. The light window is composed of a metal microstructure resonance layer, a transparent dielectric layer and a metal mesh layer which are sequentially stacked from top to bottom. The metal microstructure resonance layer can generate electric resonance with double resonant frequencies due to the existence of pores and patches, and the metal microstructure resonance layer, the transparent dielectric layer and the metal mesh layer are utilized to form a Fabry-Perot cavity to generate Fabry-Perot cavity resonance. Broadband microwave absorption is formed under the combined action of electric resonance with double resonant frequencies and Fabry-Perot cavity resonance. In addition, the metal microstructure resonance layer and the metal mesh layer have extremely low metal duty ratios, and visible-infrared broadband high light transmission can be achieved. The application range of the optical transparent broadband microwave absorption technology is expanded, and the optical transparent broadband microwave absorption device has the advantages of corrosion resistance, wide absorption bandwidth, visible-infrared broadband light transmission and the like.

The invention discloses a four-corner code type terahertz absorber and a design method thereof, and relates to the technical field of microwave absorbers, and the absorber comprises a metal resonance layer, an intermediate dielectric layer and a metal reflection layer which are sequentially arranged from top to bottom; the metal resonance layer comprises a plurality of metal microstructures which are periodically arranged, each metal microstructure comprises four corner brace type metal patches, and right angles of the four corner brace type metal patches are aligned with the central position and are distributed in a central symmetry manner; the width and the length of each corner-code-type metal patch and the distance between two adjacent corner-code-type metal patches are obtained through multi-target particle swarm optimization optimization design, rapid design of the four-corner-code-type terahertz absorber can be achieved, simultaneous optimization design of two or more performance indexes is achieved, and the design efficiency and the absorption performance are improved.

The invention provides a metasurface-based adjustable orbital angular momentum single-mode antenna and a manufacturing process thereof, and the metasurface-based adjustable orbital angular momentum single-mode antenna comprises a planar dielectric substrate and a plurality of Y-shaped metal units arranged on the planar dielectric substrate, the three-arm width and the rotation angle of each Y-shaped metal unit in the space coordinate r respectively meet Dirac vortex modulation and angle perturbation. The invention discloses a manufacturing process of an adjustable orbital angular momentum single-mode antenna based on a metasurface. The manufacturing process comprises the following steps: preparing a mask on a planar dielectric substrate, and etching a metal microstructure; an SMA interface is welded on the back surface of the planar dielectric substrate; the coaxial lines are used for connection; the front surface of the planar dielectric substrate is chemically polished and covered with a protective film. According to the invention, the problems that the orbital angular momentum mode of the orbital angular momentum antenna is difficult to flexibly adjust, different orbital angular momentum modes are easily coupled, the single-mode performance is poor, signal interference is easily caused, the phase control needs to be accurately adjusted, and the design is complex are solved.

The application relates to the technical field of infrared stealth, precise thermal control and electromagnetic compatibility, and particularly discloses a film system structure with visible ultra-high reflectivity, middle-infrared and far-infrared low emissivity and microwave high permeability; the medium stack layer has high reflectivity to visible light; the metal microstructure layer has low emissivity to middle-infrared and far-infrared light and high permeability to microwaves; the film system structure has visible light reflectivity greater than 60%, middle-infrared and far-infrared light emissivity lower than 30% and microwave permeability higher than 60%. The application realizes perfect compatibility of infrared stealth and microwave absorption, keeps infrared low emissivity (epsilon < 0.1) and realizes high permeability (greater than 95%) to 1-18GHz microwave bands. The application solves the thermal failure problem of the composite stealth structure, realizes average visible light reflectivity (greater than 95%) through the medium stack layer, greatly reduces the solar heat load and improves the overall optical performance.

The invention discloses a device and method for preparing a crystalline silicon surface metal microstructure through laser-driven localized electro-deposition. In the device, an electrochemical loop is formed among electrolyte, an anode and a semiconductor wafer; a laser beam emitted by the second laser irradiates the semiconductor wafer for maskless localized electro-deposition processing, and a laser beam emitted by the first laser is split by the optical splitter and then irradiates the anode and the processed surface of the semiconductor wafer respectively; the device is used for heating the anode so as to adjust the distance between the anode and the semiconductor wafer, thereby regulating and controlling the deposition rate and the size and morphology of a deposition layer, and carrying out synchronous heat treatment on a metal microstructure deposited on the processed surface of the semiconductor wafer. By means of the method, it can be guaranteed that a localized conductive channel is induced to be generated at the laser irradiation position of the monocrystalline silicon surface, then laser-induced mask-free localized electro-deposition on the silicon surface is achieved, and the problems that at present, the deposition process on a semiconductor material is tedious, and the step-by-step operation efficiency is low are solved.

The present invention provides an absorbing metamaterial, comprising an electromagnetic metasurface material and a first electromagnetic absorbing material and an impedance matching material superimposed on the front and back surfaces of the electromagnetic metasurface material. The electromagnetic metasurface material is a series connection of a capacitor and an inductor in the equivalent circuit of the absorbing metamaterial, and the first electromagnetic absorbing material and the impedance matching material are both resistors in the equivalent circuit of the absorbing metamaterial. One or more metal microstructures are respectively provided in one or more regions of the electromagnetic metasurface material. In addition, the present invention also provides an absorbing structural part and a mobile carrier. The technical solution provided by the present invention can adapt to complex external electromagnetic environments. By combining the electromagnetic metasurface material with a functional absorbing substrate, the present invention changes the absorption frequency of the absorbing functional structure in response to dynamic changes in the electromagnetic interference frequency, thereby effectively improving the electromagnetic compatibility and anti-interference performance in complex electromagnetic environments.

The present invention discloses a metallographic structure intelligent identification method for metal materials, the steps of which include: collecting metal microstructure images; extracting component features from the metal microstructure images; and judging the constituent phases of the metal materials according to the component features. The present invention provides a metallographic structure intelligent identification method, device and storage medium for metal materials, which can identify the metallographic structure of the material to be tested.

The present application relates to a flexible strain sensor with extremely low temperature effect, comprising: a metal composite flexible substrate comprising polymer and metal microstructures arranged alternately; and a strain sensitive grid resistor arranged above the metal composite flexible substrate, wherein the grid bar direction of the strain sensitive grid resistor is consistent with the arrangement direction of the metal microstructures in the metal composite flexible substrate. The present application also relates to a preparation method of the flexible strain sensor with extremely low temperature effect. The strain direction detected by the flexible strain sensor is consistent with the direction in which the metal composite flexible substrate has a low thermal expansion coefficient, and the thermal deformation rate of the metal composite flexible substrate in this direction is low, thereby reducing the influence of the temperature effect of the substrate in the strain direction on the strain measurement.

A method, program, and apparatus for creating a metal material microstructure analysis model capable of automatically calculating the characteristic quantities of particles constituting the structure of a metallic material are provided. [Solution] The method for creating a metal material microstructure analysis model is a method for creating a metal material microstructure analysis model that automatically performs phase classification to analyze the structure of a metal material, and includes: an acquisition step (S1) for acquiring characteristic values ​​and manufacturing conditions of the metal material; a determination step (S2) for determining acquisition conditions for acquiring a microstructure image of the metal material; an adjustment step (S4) for adjusting a microstructure image that satisfies the determined acquisition conditions so that the peak, minimum, and maximum values ​​of the brightness distribution fall within a predetermined grayscale range; and a model creation step (S5) for creating a metal material microstructure analysis model in which the characteristic quantities of particles in the adjusted microstructure image are the objective variables and the acquired characteristic values ​​and manufacturing conditions of the metal material are the explanatory variables.

The present invention discloses a complex amplitude vector light field system based on a terahertz on-chip metasurface, comprising a metasurface region and an intrinsic region spliced ​​together in the horizontal direction, a plurality of compound metaperiodic units arranged along the horizontal and vertical planes, and an intrinsic primitive cell. The plurality of compound metaperiodic units arranged along the horizontal and vertical planes are arranged in the metasurface region, each compound metaperiodic unit comprises a 2*2 array of metasurface primitive cells, each metasurface primitive cell comprises a metal microstructure layer, a first dielectric film layer, and a first metal thin layer arranged in sequence along the vertical direction, and the metal microstructure layers of the plurality of metasurface primitive cells are rotated and arranged according to a required phase distribution; the odd-numbered columns in the compound metaperiodic units radiate left-handed circularly polarized complex amplitude light fields, and the even-numbered columns radiate right-handed circularly polarized complex amplitude light fields, and a vector light field with a preset polarization state is synthesized through interference of left-handed circular polarization and right-handed circular polarization in free space.

The invention discloses an intelligent rating method for network carbides of high-carbon-chromium bearing steel, and relates to the technical field of metal microstructure analys.The intelligent rating method comprises the steps that a network carbide image of a high-carbon-chromium bearing steel sample is collected, and a data set is made; training the image segmentation model based on the data set; obtaining a to-be-detected network carbide image of the target high-carbon chromium bearing steel, and extracting a mask pattern of network carbide in the image through the image segmentation model; and rating the network carbide based on the structural data of the network carbide in the mask graph. According to the method, intelligent rating of the network carbide is achieved, efficient, accurate and rapid rating of the network carbide is achieved, and development of metallographic detection and analysis is facilitated.

The invention relates to the technical field of metal material plastic forming, in particular to a metal microstructure strain obtaining method based on a microstructure. The method comprises the following steps: S1, preparing a plurality of mechanical property test samples of a metal blank before forming; s2, metal blank pre-deformation samples with different strain magnitudes are manufactured; s3, detecting and analyzing crystallographic characteristics of each metal blank pre-deformation sample; s4, establishing a theoretical calculation model of the crystallographic characteristics of the deformed metal along with the change of the strain; s5, detecting and analyzing crystallographic characteristics of the to-be-tested plastic forming metal microstructure device in different areas; and S6, based on the crystallographic characteristics of the different areas of the to-be-tested plastic forming metal microstructure device, calculating and analyzing the strain in the different areas of the to-be-tested plastic forming metal microstructure device by adopting a theoretical calculation model. According to the method, the internal strain of the plastic forming microstructure metal device can be accurately and effectively calculated and analyzed.

A plated steel sheet includes a steel sheet and a plating layer disposed on a surface of the steel sheet, the steel sheet satisfying the following formulas (1) and (2), wherein the steel sheet included in the plated steel sheet has a predetermined composition, and has a metal microstructure in which a total of ferrite and upper bainite accounts for 30 to 70 area%, tempered martensite accounts for 10 to 45 area%, MA accounts for 5 to 35 area%, and retained austenite accounts for 5 to 20 vol%. TSmax−TSmin<20MPa TSmin≥980MPa

The application discloses a spiral wire anode rotating disc device for electroforming additive manufacturing, and belongs to the technical field of electroforming additive manufacturing. The device comprises a rotating disc carrier plate, a plurality of wire anodes, an auxiliary cathode and a power supply. The lower surface of the rotating disc carrier plate is provided with Archimedes type arranged spiral grooves, and is staggered with the wire anodes to form a driving type micro channel system; the auxiliary cathode is arranged at the outer side edge of the rotating disc and is connected with the power supply through a shunt. The application improves the current carrying capacity and effective working area through the parallel arrangement of the multiple anodes, enhances the inter-electrode mass transfer efficiency in combination with the micro channel system, and suppresses the edge effect by using the auxiliary cathode. The synergistic work of the structure optimizes the electric field distribution and the mass transfer process, thereby realizing the synchronous improvement of the deposition rate, thickness uniformity and effective utilization rate of the substrate, and can be widely applied to the additive manufacturing scene of the metal microstructure with high efficiency and high consistency.

The present disclosure provides a high-sensitivity terahertz sensor. The high-sensitivity terahertz sensor includes a substrate; a metal microstructure array, including a plurality of metal microstructure units, and covering the substrate to form a metasurface; and metal nanostructures, located at gaps of the metal microstructure array, where the metal microstructure array and the metal nanostructures are formed by etching a metal film on the substrate through pulsed laser direct writing. The present disclosure utilizes the metasurface and the metal nanostructures to cooperatively enhance the terahertz wave, promoting full interaction between the terahertz wave and the analyte and improving terahertz detection sensitivity.

This invention provides a method for improving the fatigue life of flexure components in harmonic reducers, belonging to the field of metal microstructure control technology. This invention achieves grain refinement and homogenization, avoids carbides, greatly increases the stability of the retained austenite structure, prevents its decomposition under mechanical driving force during large strain processes, avoids microstructural changes that affect performance stability, eliminates residual stress, and improves the fatigue life of the flexure, enabling it to meet long-life service requirements.

The invention provides a building risk real-time assessment method and system based on a multi-mode remote sensing image, and relates to the technical field of building safety monitoring, and the method comprises the steps: obtaining a high-precision radar and infrared image, recognizing a building metal structure region, and extracting a preliminary region and a temperature abnormal region; acquiring signals through an internal vibration monitoring network, determining a potential damage area by combining strength distribution and abnormal area information, and extracting vibration characteristics; the method comprises the following steps: establishing a physical correlation model of a metal microstructure and a radar signal, generating a response diagram through space-time matching, calculating radar signal attenuation caused by vibration, comparing and fusing with a fatigue threshold value, combining temperature anomaly correction, generating a risk index of welding seam cracking, adjusting a sampling frequency according to a risk level, and outputting an evaluation result containing the risk index and coordinates. The real-time accurate assessment of the welding seam cracking risk of the building metal structure can be realized through multi-modal data fusion and dynamic monitoring adjustment.

Soft, elastically deformable composites of multifunctional materials for electronics, robotics, and reconfigurable structures. Liquid metal (LM) droplets dispersed in elastomer matrices has unique combinations of soft mechanical response with exceptional electrical and thermal functionalities. These properties are strongly dependent on the material composition and microstructure. Control of LM microdroplet morphology to program mechanical and functional properties is by annealed-deformation shaping LM droplets in soft composites to create programmable microstructures in stress-free materials. Thermo-mechanical shaping is one example of annealed-deformation shaping. This enables LM loadings up to 70% by volume with prescribed particle aspect ratios and orientation, enabling control of microstructure throughout the bulk of the material. Through this microstructural control in soft composites, a material which simultaneously achieves a thermal conductivity as high as 13.0 W m−1 K−1 (>70× increase over polymer matrix) with low modulus (<1.0 MPa) and high stretchability (>750% strain) is demonstrated in stress-free conditions.

The application discloses a perfect absorption device based on a dielectric grating and having an ultrahigh quality factor. The perfect absorption device comprises a substrate, a dielectric grating and a metal microstructure, wherein the dielectric grating is located on the substrate, and the metal microstructure is periodically arranged on protrusions of the dielectric grating, so that guided modes (GMs) are excited in a non-resonance region of a localized surface plasmon resonance (LSPR), thereby realizing perfect absorption with an ultrahigh quality factor. The device structure of the application realizes double-band near-perfect absorption in a near-infrared region and a high quality factor (Q >= 8115), and obtains the highest quality factor of near-perfect absorption in a currently known plasmonic system, and is a perfect absorption device with excellent performance.

A metal-inside-fiber-composite including a biopolymer based fiber having a fiber wall and a void space. The fiber wall envelops the void space such that the void space forms a continuous void space inside and along the fiber. A metal microstructure makes the metal-inside-fiber-composite electrically conductive. A method for producing a metal-and-fiber-omposite, in particular a metal-inside-fiber composite, is also provided.

The invention discloses an additive manufacturing method for preparing a heterogeneous material, the heterogeneous material and application, and relates to the technical field of additive manufacturing. The modificator is synchronously fed in the process of laser additive manufacturing of the metal welding wire for deposition, so that the reliability of additive forming is guaranteed, the effect of regulating and controlling the metal microstructure is achieved by adjusting the variety and content of the modificator, then different positions of the heterogeneous material are regulated and controlled to have different properties, and additive manufacturing of the multi-performance heterogeneous material is achieved. Compared with a traditional manufacturing method, the laser additive manufacturing mode can be adopted for manufacturing according to the size of the part, and loss and waste of materials are reduced. The metal welding wire body is adopted for forming, the modificator is adopted for adjusting the additive, the preparation cost is reduced, the obtained multi-performance heterogeneous material component is uniform in thickness, performance changes can occur in the width and / or height direction, and the technology is stable and easy to achieve.

To provide a volatile compound detection device capable of being used easily and repeatedly.SOLUTION: The volatile compound detection device includes: a light-transmissive substrate 10; a metal microstructure 20 formed over the surface of the light-transmissive substrate 10 to induce localized surface plasmon resonance; a non-porous metal oxide membrane 30 formed to cover at least the surface of the metal microstructure 20, which contains metal oxides that react with volatile compounds; a light source 40 that irradiates an inspection light 100 onto a metal microstructure 20; and an optical receiver 50 that receives at least one of transmitted light, reflected light, and scattered light of the inspection light 100 irradiated on the metal microstructure 20.SELECTED DRAWING: Figure 1

The invention discloses a spiral anode rotating disc device for electroforming additive manufacturing, and belongs to the technical field of electroforming additive manufacturing. The device comprises a rotating disk carrier plate, a plurality of line anodes, an auxiliary cathode and a power supply. Spiral grooves which are arranged in an Archimedes type are formed in the lower surface of the rotating disc carrier plate and are staggered with the line anodes, so that an active micro-channel system is formed; the auxiliary cathode is arranged on the outer edge of the rotating disc and is connected with the power supply through the shunt. Through parallel arrangement of multiple anodes, the current bearing capacity and the effective working area are improved, the interpolar mass transfer efficiency is enhanced in combination with the micro-channel system, and the edge effect is inhibited by using the auxiliary cathode. The cooperative work of the structure optimizes the electric field distribution and mass transfer process, so that the deposition rate, the thickness uniformity and the effective utilization rate of the substrate are synchronously improved, and the method can be widely applied to additive manufacturing scenes needing high-efficiency and high-consistency metal microstructures.

The invention discloses a terahertz metamaterial sensor based on a metal microstructure, which comprises a substrate layer, a metal reflecting layer, a microfluidic channel layer and a cover layer, and further comprises the metal microstructure, the metal microstructure extends into the microfluidic channel layer, and the top of the metal microstructure is fixed on the cover layer through etching; the metal microstructure comprises resonance units which are arranged periodically, and each resonance unit comprises an inverted-L-shaped structure and a circular ring-shaped structure. According to the invention, the resonance units of the metal microstructures are arranged to be two circular ring structures and one inverted L-shaped structure, absorption peaks with high absorptivity are generated in different wavelength ranges, and high-sensitivity sensing detection of liquid-phase biological analytes with different refractive indexes is realized; the synergistic effect of dipole resonance and lattice surface resonance initiates high-order response, an absorption peak with higher sensitivity is generated, and the detection sensing sensitivity is improved; the liquid-phase biological analyte is in contact with the terahertz waves in the microfluidic channel layer, so that the absorption of water to the terahertz waves is effectively reduced, and the detection sensitivity of the sensor is further improved.

The invention discloses curved surface metal microstructure etching processing equipment and an etching method. The curved surface metal microstructure etching processing equipment comprises a machine table, a protection frame arranged on the machine table and an etching liquid storage container arranged on the right side of the protection frame. By arranging the rotation adjusting mechanism and the arc-shaped displacement adjusting mechanism, overall adjustment of the angle of the spray head in the circumferential direction and adjustment of the angle position of the spray head along an arc-shaped track can be achieved, and the overall adjustment and the adjustment can be matched at the same time and also can be matched in real time through lifting of an electric cylinder; therefore, the angle position of the spray head can be randomly adjusted in real time during etching, and the problem that in the prior art, due to the fact that an etching spray head is arranged above a curved-surface workpiece in a relatively horizontal mode, the spray head cannot carry out adaptive spray etching processing along an arc-shaped track of the curved-surface workpiece is solved. Therefore, the situation that the spraying area can only cover the local part of the curved surface occurs, and the overall etching processing quality is better.