24 results about "Metal microstructure" patented technology

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.

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 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.

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 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 application provides a building risk real-time evaluation method and system based on multi-modal remote sensing images, relates to the technical field of building safety monitoring, and obtains high-precision radar and infrared images, identifies a building metal structure area, and extracts a preliminary and temperature anomaly area; signals are collected through an internal vibration monitoring network, potential damage areas are determined in combination with intensity distribution and anomaly area information, and vibration characteristics are extracted; a physical correlation model of a metal microstructure and a radar signal is established, a response map is generated through space-time matching, a radar signal attenuation amount caused by vibration is calculated, and comparison and fusion are performed with a fatigue threshold value, temperature anomalies are corrected in combination, a risk index of weld cracking is generated, a sampling frequency is adjusted according to a risk level, an evaluation result containing the risk index and coordinates is output, multi-modal data fusion and dynamic monitoring adjustment can be achieved, and real-time and accurate evaluation of the weld cracking risk of a building metal structure can be achieved.

A bilayer mold for forming polymer microstructures is provided. The bilayer mold includes a rigid plastic cylinder having slots defined along an outer periphery of the rigid plastic cylinder; and a layer of plastic elastic polymer material disposed within the slots and having indents defined therethrough and in the rigid plastic cylinder. The indents have a first profile extending through the layer of plastic elastic polymer and terminating within the rigid plastic cylinder. A metal polymer structure profile is also provided using laser-etching of a desired shape for the features of the microstructures in a metallic foil, followed by further refining of the features. The polymer and metal microstructures can be formed on the surface of a stent to facilitate retention of the stent.

The application discloses a terahertz super surface device based on a Babinet complementary structure and belongs to the technical field of terahertz functional devices. The terahertz super surface device comprises a dielectric substrate layer, the top of the dielectric substrate layer is provided with a metal microstructure, the metal microstructure comprises a plurality of periodically arranged Babinet complementary resonance units, a single Babinet complementary resonance unit comprises two metal ring resonators with different radii or corresponding complementary hollow ring resonators. Through the regulation of the symmetry breaking degree of the Babinet complementary resonance unit, continuous regulation from ideal continuous domain bound state to quasi-continuous domain bound state is realized, the quality factor can be flexibly adjusted in a wide range according to the breaking parameter, and the device has polarization-dependent complementary electromagnetic response. The application has the advantages of simple structure, easy processing and low insertion loss and can be widely used in the fields of terahertz sensing, filtering, polarization regulation and the like.

The invention belongs to the technical field of optical devices, and particularly relates to a medium-wave infrared metasurface cross-polarization regulation and control device and method and application. The medium-wave infrared metasurface cross-polarization regulation and control device is formed by periodically arranging metal microstructure layers on the upper layer of a dielectric layer and attaching a metal film layer to the lower layer of the dielectric layer. The thickness of the three-layer structure of the device is far smaller than the working wavelength. In a medium-wave infrared band of 3-4.2 microns, for normal incident linearly polarized light with an incident angle of 0 degree, the polarization direction of reflected light is orthogonal to incident light, the polarization conversion efficiency of the device is greater than 99%, and efficient conversion from the linearly polarized light to the orthogonal polarization direction can be realized.

The invention discloses an intelligent control method and system for an aluminum profile extruder based on multi-parameter fusion, and belongs to the field of non-ferrous metal processing automation control. According to the method, pressure, speed and outlet temperature signals in the extrusion process are collected in real time, a state observer is built based on a rheological model, and an equivalent characteristic parameter Z representing metal microstructure evolution is deduced. Under the condition that it is detected that the pressure change rate is abnormally increased and the outlet temperature change is not responded, the system executes nonlinear compensation control, and instantaneous limited adjustment is conducted on the speed of an extrusion shaft so as to weaken rheological hardening of a die dead zone and maintain a Z parameter within a preset tissue stability interval; and after the outlet temperature responds, the speed is controlled to smoothly return. Through the control mode, under the condition that the hardware cost is not increased, the structure uniformity and the surface quality consistency in the aluminum profile extrusion process are improved.

The invention relates to the technical field of composite material connection, and provides a CFRP material and metal material laser welding device and method.The device comprises a base, a workbench, a texturing pretreatment device and a vibration module, and the workbench is arranged on the base and used for bearing and fixing a CFRP workpiece and a metal workpiece; the texturing pretreatment device is used for machining a to-be-welded surface of the CFRP workpiece to form a micro-groove structure; the vibration module is arranged between the workbench and the base and used for applying spatial multi-dimensional vibration to the workbench in the laser welding process. The texturing pretreatment device is used for constructing a microstructure on the CFRP surface so as to increase the bonding area, spatial multi-dimensional vibration is introduced in the welding process through the vibration module, through the synergistic effect, the micro grooves are effectively filled with molten metal, and finally a firm mechanical interlocking interface is formed. According to the device, the problems of low bonding strength and poor reliability caused by high-temperature failure of a metal microstructure and insufficient one-way filling of resin in a traditional method are remarkably solved.

This invention relates to the field of electromagnetic wavefront modulation functional devices. It discloses a three-dimensional far-field beamforming encoding and modulation structure for terahertz waves, comprising a composite microstructure arranged in a rectangular pattern on a two-dimensional plane, consisting of a substrate, a metal base plate, a metal microstructure, and a HEMT. The key feature is that the metal microstructure and HEMT are located on the substrate surface. The metal microstructure is a notched ring, and the HEMT is placed at the notch. The HEMT consists of a gate lead, a hetero-doped structure, a source electrode, and a drain electrode. This invention employs a two-dimensional digitally independently encoded and modulated composite microstructure array unit to generate changes in reflection amplitude and phase, ultimately achieving three-dimensional far-field beamforming encoding and modulation. It possesses high beamforming freedom, real-time beamforming capability, and is small in size and thin in thickness.

The invention discloses a pulse electrochemical etching method for a nickel-based high-temperature alloy core plate micro-channel, and belongs to the technical field of metal microstructure manufacturing and surface processing. According to the method, the pattern windowing of the anti-corrosion layer is adopted to limit the forming area, pulse electrochemical selective dissolution is implemented under the conditions of flat plate opposite arrangement and slit flowing liquid supply, the electrolyte is compounded through a sulfuric acid system to improve the conductivity and wetting bubble removal capacity, and the lateral dissolution tendency is weakened in cooperation with the lateral corrosion inhibiting additive; meanwhile, efficient removal and morphology correction are taken into consideration through segmented excitation of rough etching and fine etching of asymmetric bipolar pulses, so that the micro-channel machining efficiency, stability and section rectangularity are synchronously improved under the condition that electrolyte is not replaced; and stable amplification of the process of the core boards with different sizes can be realized through parameterized control of the current density and the flow per unit area, so that the problems that the lateral erosion tendency is large, the section rectangularity is difficult to guarantee, the dissolution stability is insufficient, the efficiency and the morphology are difficult to consider and the like in the existing processing method are effectively solved.

The application discloses a high-temperature alloy grain size evaluation method, system, electronic equipment and medium, and relates to the field of ultrasonic evaluation of metal microstructure, and the evaluation method comprises the following steps: according to the real data of the grain size, ultrasonic speed and attenuation coefficient of a high-temperature alloy sample, an evaluation model is constructed by applying a PSO-SVM algorithm; a high-temperature alloy polycrystalline structure geometric model simulated by a Voronoi diagram is generated; simulation data is obtained by simulating the polycrystalline structure geometric model; the evaluation model is trained by taking the simulation data and real data of the attenuation coefficient and ultrasonic speed and the simulation data and real data of the corresponding grain size as a training data set; the attenuation coefficient and ultrasonic speed of a high-temperature alloy to be evaluated are taken as input data of the model, the data is input into the trained evaluation model, and the grain size evaluation value is calculated. The application overcomes the problems of the prior art, such as destructiveness and large evaluation model error of the grain size under the condition of a small number of samples.

The invention discloses an array antenna which comprises a polarization conversion metasurface layer at the top, an electromagnetic gap excitation layer arranged below the polarization conversion metasurface layer and a reflection surface layer arranged at the bottom. The polarization conversion metasurface layer comprises metal microstructures arranged in a chessboard mode. The reflecting surface layer comprises a plurality of electromagnetic band gap reflecting units which are arranged in an array. According to the invention, the broadband impedance matching performance of the antenna can be obviously optimized, high efficiency and broadband radiation are realized, the back lobe radiation level of the antenna is effectively reduced, the gain is improved, and the impedance bandwidth of the antenna is widened.

The invention provides a metal microstructure damage detection method, and belongs to the technical field of metal damage detection. The metal microstructure damage detection method comprises the following steps: freezing a metal sample containing original microstructure damage under a T1 temperature condition, and then carrying out fracture treatment to prepare a sample containing a fracture surface; detecting the fracture surface of the sample containing the fracture surface by adopting an image acquisition device; wherein the damaged surface of the original microstructure is located on the fracture surface; the metal sample has a ductile-brittle transition temperature, the ductile-brittle transition temperature is T2, and T1 and T2 meet the following condition: T1 is less than T2. According to the method for detecting the metal microstructure damage, brittle failure of the metal sample is achieved, no obvious metal toughness extension phenomenon exists on the fracture surface, the detection accuracy of original defects and fracture morphology in the tough metal sample can be improved, and therefore reliable data support is provided for the reliability and failure mechanism of a metal product.

The application relates to the technical field of non-contact optical precision measurement, and provides a variable annular light field illumination system based on critical illumination to solve the problems of difficult illumination of inner walls and interference of stray light on outer surfaces in non-contact measurement of metal microstructure features. Light emitted by a light source first passes through a collimating lens to form parallel light, then passes through two conical lenses with specific distances to form annular light which is scattered on ground glass, the scattered light passes through a diaphragm for shaping, then passes through a collimating lens to form parallel light again, and finally passes through a reflecting mirror and a beam splitter to be focused on an objective lens and a working plane, i.e. a to-be-measured object. The variable illumination light field can fully illuminate the inner walls of micro-holes, and in addition, by adjusting the conical lenses, the illumination system can adapt to most non-contact measurement scenes of microstructure features, thereby providing technical support for the field of non-contact optical precision measurement.

The cold-rolled steel sheet of the present invention has a specified chemical composition. The microstructure at a position (t / 4 portion) on the thickness direction, at a distance of 1 / 4 of the sheet thickness t from the surface, contains, by volume percentage, 2.0% to 8.0% retained austenite, 80.0% to 98.0% tempered martensite, 0.0% to 15.0% ferrite and bainite combined, and 0.0% to 5.0% martensite. This composition is present at both the central portion and at a distance of 50 mm from the end in the width direction. In which part of the edge, the metal microstructure at a position 20 μm from the surface in the thickness direction of the plate (i.e., the 20 μm portion) contains, by volume percentage, 75.0% or more and 100.0% or less of ferrite and bainite, and 0.0% or more and 25.0% or less of martensite and tempered martensite. Furthermore, the metal microstructure at a position 75 μm from the surface in the thickness direction of the plate (i.e., the 75 μm portion) contains, by volume percentage, 0.0% or more and 15.0% or less of ferrite and bainite.

The application discloses a kind of based on surface wave's coherent multicore optical fiber probe, including multicore optical fiber and metal film, metal microstructure hole is provided on the metal film, the multicore optical fiber includes optical fiber cladding and the core distributed in the optical fiber cladding inside, the core is set as at least two, the metal film covers the tip of the core, the incident light in the core inside channel is polarization state orthogonal or the same signal, surface plasmon is excited from the surface layer of the metal film or from the metal microstructure hole and is transmitted, the sensitivity of micro parameter is dynamically regulated using the phase difference between incident light.The application uses a kind of based on surface wave's coherent multicore optical fiber probe, can realize any parameter sensing according to the required environment, does not need strict spatial collimation, coupled light path, eliminates the influence of incident light oblique incidence on device performance, with low energy consumption, dynamic tuning, high integration, structure is small, system stable and the like characteristics.