124 results about "Gradient material" patented technology

The invention belongs to the technical field of 3D printing, and particularly relates to a 3D printing control method based on multi-material gradient transition, which comprises the steps of model processing, multi-material distribution, path planning, dynamic parameter control, online monitoring and feedback optimization. According to the method, through dynamic mixing of a nonlinear gradient function and multiple materials, limitation of traditional discrete material switching is broken through, continuous smooth transition of material attributes is achieved, printing parameters are dynamically adjusted, and the forming consistency of gradient materials under complex working conditions is remarkably improved; local strengthening is carried out according to the thermodynamic property difference of a multi-material interface, interface embrittlement caused by a traditional single process is avoided, the curing degree is detected in real time through a spectrum sensor, the problem that the curing degree of a traditional light curing process is uncontrollable is solved by combining partitioned UV light intensity adjustment and control, and precise gradient forming of a soft and hard alternate structure is achieved.

A valve seat for a pumping assembly. The valve seat includes a body including a gradient material structure that defines a strike face for the valve seat. The gradient material structure has a first material, a second material spaced from the first material, and a smooth compositional transition between the first material and the second material. In addition, the valve seat includes a bore extending through the body.

The invention discloses a quality detection method in a functionally graded material preparation process, and relates to the technical field of functionally graded materials.The quality detection method comprises the following steps that the temperature of a green body in the functionally graded material preparation process is collected, and green body temperature distribution data is obtained; performing real-time thickness measurement on the green body according to the green body temperature distribution data to obtain a green body thickness change curve; identifying an abnormal fluctuation section in the thickness change curve of the green body, and carrying out phase detection on a physical region with the abnormal fluctuation section of the green body to obtain regional phase composition data; performing internal defect scanning on the green body according to the regional phase composition data to obtain an internal defect map of the green body; performing quality evaluation on the green body based on the green body internal defect map to obtain a quality grade judgment result; according to the method, the ultrasonic flaw detection scanning range is guided based on the phase abnormal region, and high-resolution internal flaw detection can be performed on the high-risk region of the functionally graded material in a targeted manner.

A valve seat for a pumping assembly. The valve seat includes a body including a gradient material structure that defines a strike face for the valve seat. The gradient material structure has a first material, a second material spaced from the first material, and a smooth compositional transition between the first material and the second material. In addition, the valve seat includes a bore extending through the body.

The invention is suitable for the technical field of hovercar control, and provides a thermal-vibration-weight collaborative optimization method of a high-power-density hovercar controller, and the method comprises the steps: constructing a three-dimensional housing structure based on fractal mechanics, achieving 35-45% of weight reduction through bionic design, and remarkably reducing the weight while guaranteeing the structural strength; thermal management, electromagnetic compatibility and vibration suppression collaborative optimization layout is established, a high-heating-power module is arranged near a heat dissipation air opening, and a sensitive control unit is arranged in a center damping area of a shell; a gradient material distribution scheme is adopted, a high-heat-conduction composite material is configured in a high-heat-flow area, and a high-damping material is adopted in a vibration sensitive area. Under the high-power working condition, the heat dissipation performance of the controller is improved, vibration transmission is reduced, the overall weight is reduced, and high-reliability control hardware support is provided for the hovercar.

The invention relates to the technical field of building construction, in particular to a foundation construction material and a dynamic compaction construction method.The construction method comprises the following steps that S1, an early-stage preparation stage is conducted; s2, a trial compaction and parameter optimization stage; s3, a main body construction stage; s4, a multi-field coupling maintenance stage; s5, a foundation quality detection stage; and S6, an acceptance and filing stage. Through intelligent sensing and dynamic parameter regulation and control, self-adaptive optimization of the tamping process is achieved, over-tamping or under-tamping is avoided, and the foundation bearing capacity is improved by 15%-20%; the layered filling design of the gradient material is matched with different depth mechanical requirements, the grading continuity coefficient is larger than or equal to 0.5, and the compactness of the pier body is improved by 25% or above; an innovative Q value evaluation formula integrates multi-dimensional parameters, the detection accuracy rate reaches 90% or above, and the rework rate is remarkably reduced; the maintenance period is shortened to 7 days through the multi-field coupling maintenance technology, and the construction efficiency is improved by 50%; and the material cost is reduced by 30% by recycling the construction waste, and the method has economical efficiency and environmental protection performance and is suitable for various complex foundation treatment sites.

The invention provides a functionally graded material modeling and path planning method based on additive manufacturing, and relates to the technical field of functionally graded material additive manufacturing. The method comprises the following steps: firstly, slicing a three-dimensional space model of a part to obtain geometric contour information of a model slice layer; taking the geometric contour of the layered model slice as a constraint, and carrying out triangulation processing on the two-dimensional polygon slice layer to obtain a two-dimensional triangular mesh model; correlating the material information of the customized workpiece with the geometric information by using a curved surface grid thermal diffusion model algorithm, namely, designing a single or multiple heat source points or heat source lines, and performing gradient diffusion in a grid to generate a scalar field containing material gradient distribution information; extracting a contour line of a specific scalar value to perform region division on the slice model to form a plurality of gradient feature sub-regions; and finally, according to the contour features of different sub-regions, a corresponding path planning strategy is adopted to optimize the path, an optimal path is generated, and accurate forming of the functionally graded material is achieved.

The invention provides a cooling capacity-increasing overhead conductor, a dynamic current-carrying capacity determination method, a medium and equipment, and relates to the technical field of power transmission lines, the method is characterized in that the overhead conductor adopts a three-layer composite structure, the outer layer is a passive cooling coating, the thickness is 50-200 [mu] m, the surface is provided with a micro-nano structure for enhancing mid-infrared radiation, the emissivity is greater than or equal to 0.92, and the dynamic current-carrying capacity is greater than or equal to 0.92; the contact angle is greater than 120 degrees through hydrophobic modification treatment; the middle layer is a high-conductivity aluminum alloy conductor layer, and the inner layer is a high-strength galvanized steel core; a directional heat conduction path is formed between the coating and the conductor layer through a gradient heat conduction material, and the heat conductivity coefficient of the gradient material is gradually increased from the coating to the conductor layer; the coating mode of the coating is axial segmented coating or net-shaped coating. According to the overhead conductor, the current-carrying capacity of the line can be effectively improved, the power transmission design of the line is optimized, and the quantitative index of the capacity increasing effect can be obtained through the dynamic current-carrying capacity determination method.

The invention relates to the technical field of shoes, and discloses a foot self-adaptive support adjusting method based on a biomechanical model, which comprises the following steps: S1, foot biomechanical modeling: acquiring foot geometric data of a user through three-dimensional scanning, acquiring dynamic load parameters in combination with gait analysis, and constructing a personalized foot finite element model; s2, stress distribution calculation: sampling according to 0-100% phase intervals of 10% in a gait cycle; s3, material gradient design: determining a gradient material rigidity mapping relation according to Pmax distribution; and S4, realizing a self-adaptive structure: constructing a gradient sole structure through 3D printing. A high-shear-force area is judged through double threshold values, and a pressure gradient self-adaptive non-uniform honeycomb structure and configuration classification are arranged in the area, so that local deformation is dynamically regulated and controlled in a pedaling and stretching period and a landing period, and the effects of reducing a stress peak value of the high-shear area and reducing friction heat accumulation are achieved.

The invention provides a gradient material accurate forming-oriented closed-loop control friction solid-phase additive manufacturing method and system. The invention discloses a closed-loop control friction solid-phase additive manufacturing method for gradient material accurate forming. The method comprises the following steps that S1, a metal substrate is prepared, and a reference digital twin model is loaded; s2, depositing a first metal layer by adopting a friction solid-phase additive process; s3, at a preset interval of completing one-layer deposition or multi-layer deposition, the current actually-measured forming surface of the workpiece is scanned to obtain three-dimensional point cloud data of the workpiece; s4, generating a three-dimensional shape deviation graph containing positive and negative deviation values of each coordinate point; s5, generating a compensatory manufacturing scheme for depositing a next layer; s6, the friction solid-phase additive manufacturing equipment is driven to execute a compensatory manufacturing scheme to deposit a next layer; and S7, the steps S3-S6 are repeatedly executed. According to the method, the component precision of the gradient material component can be maintained while morphology compensation is carried out.

The invention discloses a high-density packaged TGV gradient material filling interconnection structure and a filling method thereof, and relates to the technical field of semiconductor packaging. The TGV gradient material filling interconnection structure comprises a glass through hole located in a glass substrate, and the glass through hole is filled with a conductive metal body. A micro-nano anchor structure layer, a molecular bridging layer and a conductive metal seed layer are sequentially arranged between the inner wall of the glass through hole and the conductive metal main body, and a metal bridging structure is arranged in the middle of the interior of the glass through hole; the micro-nano anchor structure layer is located on the surface of the inner wall of the glass through hole and is of a concave-convex dot matrix arrangement structure. According to the method, the micro-nano anchor nail structure and the molecular bridging layer are formed on the surface of the glass, so that the copper-glass interface bonding strength is remarkably improved, and void-free electroplating filling of the TGV through hole with the depth-diameter ratio larger than or equal to 10: 1 is achieved. The glass bridge is embedded in the glass substrate, ultra-high-density interconnection with local interconnection line width / line distance smaller than or equal to 1 m is achieved, and the 2.5 D integration requirement of more than 16 silicon-based core particles is met.

The invention belongs to the technical field of metallurgical equipment remanufacturing, and particularly relates to a gradient functionalized high-toughness shear blade material based on double-laser melting forging time sequence coupling and a preparation method thereof. The gradient functionalized high-toughness shear blade material is prepared from the following components in percentage by mass: 0.6 percent to 0.7 percent of C, 4.5 percent to 5.5 percent of Cr, 1.8 percent to 2.2 percent of W, 1.2 percent to 1.5 percent of Mo, 0.8 percent to 1.0 percent of V, 2.8 percent to 3.2 percent of Ti, 0.008 percent to 0.015 percent of B, 0.02 percent to 0.05 percent of Ce and the balance of Fe and inevitable impurity elements. Through a three-in-one coordinated regulation and control system of gradient material design, double-laser time sequence coupling and in-situ interface strengthening, the technical bottleneck that the hardness and the toughness of a shear blade material cannot be obtained at the same time is broken through, and the problems of tipping failure, insufficient fatigue life and the like of a traditional disc shear blade material during service are solved.

The invention relates to the field of material thermal expansion testing, and provides a thermal expansion measuring device and method for gradient materials, and the device comprises an array probe module, a machine vision system, a temperature control system, a driving mechanism, a control module and a housing. The probe array module comprises probes arranged at equal intervals, and the bottom ends of the probes are in direct contact with the surface of a sample; the driving mechanism drives the probe array to scan along a sample component gradient direction; the machine vision system is used for collecting a probe top end image and combining an image processing algorithm to achieve full-area analysis of gradient components. Compared with existing equipment, the thermal expansion behavior of samples such as component gradient materials and composite materials can be represented, the thermal expansion behavior characterization device is particularly suitable for thermal expansion behavior characterization of key components such as aerospace gradient coatings and nuclear reactor cladding materials, and a reliable testing means is provided for design optimization of functionally gradient materials.

The invention discloses a preparation method of a functionally graded material without prefabricated powder addition, which specifically comprises the following steps: step 1, pretreatment: cutting and milling a test block workpiece, processing the test block workpiece into a fixed size and shape, and then cleaning the processed workpiece by using an ultrasonic cleaning machine; step 2, preparing a sample, and polishing the test block by using a metallographic polishing machine until the test block is polished; 3, electron beam treatment, wherein electron beams are adopted for conducting multiple times of irradiation treatment on the sample. And 4, tissue and performance testing is conducted, specifically, the microstructure is observed through a scanning electron microscope, and the mechanical performance of the functionally graded material is detected through a Vickers hardness tester. The method disclosed by the invention can be used for quickly synthesizing the functionally graded material without prefabricated addition, and has an extremely good application scene.

The invention discloses a nano-particle filling axial gradient material structure optimization method, which comprises the following steps of: constructing equivalent material parameters according to agglomeration quantity parameters of a nano-particle filling axial gradient material; a perturbation amount is set according to the agglomeration amount parameter, and a vibration control equation of the axial gradient beam is constructed according to the equivalent material parameter and the perturbation amount; perturbation expansion is carried out on the vibration control equation; solving according to the perturbation expanded vibration control equation to obtain a mapping relation between perturbation amount and frequency; and acquiring a design frequency, and calculating the design frequency according to a mapping relation between perturbation and frequency to obtain corresponding agglomeration parameter data of the nano-particle filled axial gradient material, namely a structure optimization result. According to the method, the mathematical corresponding relation between the agglomeration amount parameter and the vibration frequency can be established, so that quantitative analysis, reverse design and structural optimization of the structure of the nano-particle filling axial gradient material are facilitated.

The present invention relates to the field of 3D printing, and particularly to a high-efficiency 3D printing device and method for gradient materials based on a spiral flow channel, which are used to solve the technical problem that in traditional 3D printing technologies, it is impossible to achieve a complex gradient distribution of the particle size of reinforcing particles in composite materials or the pore size of porous materials. The printing device includes an additive manufacturing forming platform, a spiral separation and assembly system, a material supply system, and a computer control system. Through the inertial microfluidic particle manipulation mechanism of the spiral separation channel in the spiral separation and assembly system, combined with the design combination of the digital assembly extrusion head and the optimization of printing process parameters, a complex gradient distribution of reinforcing particles or sacrificial template particles in the matrix material can be achieved, which has great application potential in the fields of materials and engineering.

The invention discloses an artificial shoulder joint prosthesis design method and system, and the method comprises the steps: collecting the motion trail and muscle activation state of a shoulder joint in different motion modes, separating the feature frequency and amplitude of the shoulder joint motion, and extracting a dynamic motion feature set of the shoulder joint; inputting the dynamic motion feature set into a contact mechanical model based on a discrete element method, and simulating contact force and friction behaviors between the shoulder joint prosthesis and the skeleton to obtain contact mechanical characteristics of the prosthesis and the skeleton; and according to the contact mechanical characteristics, generating an initial structure of the prosthesis by using a topological optimization algorithm based on a generative adversarial network, generating a prosthesis topological structure with gradient material distribution, and obtaining an optimized prosthesis design scheme. By utilizing the embodiment of the invention, a prosthesis design scheme with gradient material distribution can be generated, the weight of the prosthesis is reduced, and the strength and durability of the prosthesis are enhanced.

The invention discloses an assembly type flexible connection shock-resistant and anti-seismic protection device with a gradient coupling layer, the assembly type flexible connection shock-resistant and anti-seismic protection device comprises an inner side anti-seismic layer, the gradient coupling layer and an outer layer shock-resistant layer, the inner side anti-seismic layer comprises a foundation bottom plate, a flange plate, a first corrugated plate module and a second corrugated plate module, and the flange plate is located above the foundation bottom plate. The gradient coupling layer comprises first coupling layer modules and second coupling layer modules, and the four first coupling layer modules are adjacently arranged on the sides, away from the concrete square column, of the four inner-layer buffer plates correspondingly. The two ends of the second coupling layer module are fixedly connected with the corresponding ends of the two adjacent first coupling layer modules in an inserted mode respectively, and each first coupling layer module is fixedly connected with the corresponding inner layer buffer plate through a memory alloy connecting assembly. And the outer anti-impact layer is arranged on the periphery of the gradient coupling layer. The gradient material layers are used for dissipating impact energy step by step, brittle failure caused by energy superposition is avoided, an energy transfer path is optimized, interface stress concentration is reduced, and stability under multi-disaster loads is improved.

This invention discloses a multi-mode processing method for friction stir deposition modeling driven by cascaded electric spindles. Based on a cascaded electric spindle-driven friction stir deposition modeling die head, the die head includes a screw shaft, a first electric spindle, and a second electric spindle that drives the screw shaft to rotate; a material conveying assembly including a storage box cover and a storage cavity formed by a specific inlet and a specific first outlet; and a stirring extrusion tool, wherein the first electric spindle includes a first hollow mandrel. This invention employs a compact coaxial cascaded electric spindle design, integrating the force transmission, heat transfer, and material transfer functions of the innovative hollow electric spindle into one unit, exhibiting modular characteristics. This overcomes the current additive manufacturing process where granular materials cannot be processed using a stirring tool in a coaxial friction stir process. Based on a circumferentially distributed multi-material conveying assembly design within the electric spindle assembly, this invention features material openness, enabling friction stir deposition modeling of multiple materials or gradient materials.

The invention relates to the technical field of selenium drum circulation, and particularly discloses a selenium drum recycling and replacing system and a control method.The method comprises the steps that firstly, quantitative characterization of subsurface defects and local mechanical properties is conducted on waste metal core base materials through microwave resonance and nanoindentation multi-source fusion detection, and a base material state quantitative data set is generated; performing multi-physical field transient simulation by taking the data set and target coating parameters as input, and predicting an interface residual stress score in a regeneration process; based on a prediction result, reversely solving a dynamic temperature control sequence and gradient material matching scheme; in a vacuum coating environment, active stress compensation coating is realized, transient thermal excitation modal testing is performed on the regenerated toner cartridge, high-frequency dynamic characteristics of the regenerated toner cartridge are extracted and compared with a simulation predicted value, simulation model parameters are optimized according to deviation data feedback, closed-loop control is formed, and the interface bonding strength and long-term imaging reliability of the regenerated toner cartridge are improved.

An arc wire feeding additive manufacturing method for a 321 stainless steel tissue gradient material, which relates to the field of additive manufacturing. The purpose of the present invention is to address the problems of complex processes, high costs, low deposition efficiency, easy contamination, and limited forming size existing in the preparation process of existing tissue gradient materials. The present invention proposes to control the recrystallization degree of different deposition positions by matching different ultrasonic impact and arc wire feeding additive manufacturing process parameters, and then achieve the purpose of tissue structure gradient transition, so as to prepare a metal FGM with a tissue structure gradient in this way. The present invention can achieve a relatively continuous gradient transition of the tissue structure and function gradient material of large and complex structures, achieving the effects of improving deposition efficiency, simplifying the process flow, and reducing manufacturing costs.

The invention discloses an isogeometric transient dynamics topological optimization method and system of a functional gradient plate structure, and belongs to the field of topological optimization design of functional gradient structures. According to the method, the problems of collaborative optimization of the gradient direction in the gradient material plane and the multi-material structure topology under the transient load effect and the like are solved. According to the technical key points, an isogeometric transient dynamics finite element analysis model of the functional gradient plate structure is constructed based on a reduced Gaussian integral method; constructing a smooth projection scheme and a material interpolation scheme of design variables of the functional gradient plate structure, and providing a transient dynamic topological optimization model of the functional gradient plate structure by taking the density of a control point and the volume fraction of a strong material attached to a plate unit as the design variables and the minimization of dynamic flexibility as a target; constructing a time domain adjoint equation of the topological optimization model, and obtaining sensitivity information of the target function; and finally, obtaining the optimal anti-vibration design of the functional gradient plate structure convenient for engineering application. The device is used for structural light-weight vibration reduction design of large engineering equipment under the strong vibration working condition.

The invention provides a low-deformation light-weight locally-reinforced bulletproof helmet, which relates to the field of helmet manufacturing, and comprises a basic protective layer (1), a locally-reinforced layer, a buffer energy-absorbing layer (3) and a lining comfortable layer (4), the local reinforcing layer is of a gradient material composite structure composed of a carbon fiber composite material layer (21), a silicon carbide ceramic particle reinforcing layer (22) and an aramid fiber composite material layer (23), and all the layers are combined through composite adhesive films. The buffering energy-absorbing layer (3) is arranged on the inner surface of the basic protective layer (1), and the lining comfortable layer (4) is arranged on the inner surface of the buffering energy-absorbing layer (3). The helmet has the characteristics of light weight and low deformation, local reinforcement is achieved, and the problems that an existing helmet is large in weight, poor in protection performance in key areas, large in deformation after being impacted and the like are solved.

The invention discloses a nanoindentation simulation design-based material indentation depth calibration method, device, equipment and medium, and relates to the technical field of material mechanics characterization, and the method comprises the steps of establishing a continuous gradient material finite element geometric model corresponding to a Brookfield indenter nanoindentation experiment, and constructing a continuous gradient material constitutive model with an elastic modulus continuously changing; combining the two models to perform indentation simulation at a plurality of preset maximum indentation depths to obtain simulation results; calculating an equivalent elastic modulus based on a load displacement curve in a simulation result to determine a material indentation depth corresponding to a preset maximum indentation depth of the indenter; and establishing a quantitative mapping model between the preset maximum indenter indentation depth and the material indentation depth so as to map a test result of the Brookfield indenter nanoindentation experiment at the preset maximum indenter indentation depth to the corresponding material indentation depth according to the quantitative mapping model. And the nanoindentation test result can be accurately mapped to the specific depth position of the continuous gradient material.

The invention discloses a laser welding crack tendency evaluation method for an aluminum-based gradient material packaging shell, and the method comprises the steps: designing a proper packaging shell structure according to the functional requirements of the aluminum-based gradient material packaging shell; for various material welding situations appearing in a laser welding area, metallurgical factors influencing laser welding cracks are obtained, namely, physical and chemical factors influencing laser seam welding cracks are judged according to the welding metallurgy principle, and cross test is conducted on the influencing factors through a method of generating random variables; a detection leakage rate value is obtained according to the air tightness of the verification piece after laser welding, so that the crack tendency is obtained through calculation; and a contribution model, namely a laser welding system model, of each physical and chemical factor to the laser welding crack tendency is obtained by utilizing a mathematical identification means, so that the laser welding crack tendency of the aluminum-based gradient material packaging shell is predicted. According to the method, the design of an aluminum-based gradient material packaging shell can be guided, and finally high-density packaging of the microwave part is achieved.

The invention discloses a W-Cu gradient composite material containing a pure W layer and a preparation method of the W-Cu gradient composite material, and belongs to the technical field of tungsten-copper composites.The preparation method comprises the steps that W powder is dried for 6-8 h at the temperature of 150-160 DEG C, the pretreated W-Cu gradient composite material is preheated for 2 h at the temperature of 200-300 DEG C, then the dried W powder is laid at the W-rich end of the W-Cu gradient composite material, and the W-Cu gradient composite material containing the pure W layer is obtained; performing laser cladding on the W-Cu gradient composite material paved with the W powder in a protective gas atmosphere to obtain a W-Cu gradient composite material containing a pure W layer; the pure W layer is prepared on the surface of the W-Cu gradient material through the laser cladding method, diffusion of Cu can be effectively restrained, the density of the pure W layer is improved, and meanwhile the high-purity characteristic of the pure W layer is guaranteed; the preparation method has the characteristics of high efficiency, flexible processing and accuracy, and is suitable for industrial popularization and application.

This invention applies selective laser cladding (SLS) technology to the fabrication of reducer pin tooth housings, designing a lightweight, high-strength pin tooth housing with both material and structural gradients. In terms of materials, a gradient material layer-by-layer printing process is employed, with the outer layer using high-strength alloy steel as the base layer, the middle layer using GCr15 bearing steel powder, and the inner gear surface coated with a thin layer of AlCoCrFeNi high-entropy alloy powder. A certain proportion of transition zone material is incorporated between each layer to enhance the wear resistance and contact fatigue strength of the pin tooth housing. Structurally, a certain structural gradient is used, with a three-layer structure designed using UG 3D modeling software. The top and bottom layers are solid and gapless, while the middle layer uses a negative Poisson's ratio hollow structure, significantly reducing the weight of the pin tooth housing and achieving lightweight design. This dual-gradient design allows the reducer to maintain better overall mechanical performance while achieving a lightweight design.

This invention relates to the field of silicon carbide crystal preparation technology, and discloses a crucible for growing high-purity semi-insulating silicon carbide crystals, comprising an inner liner layer, a transition layer, and an outer support layer sequentially composited from the inside out. The inner liner layer of the crucible adopts a composite structure of high-purity tantalum carbide matrix and rare earth oxides. Under high-temperature crystal growth environment, rare earth elements form a continuous segregation layer through grain boundary diffusion behavior, passivating active sites at grain boundaries and preventing oxygen impurities from penetrating inward. At the same time, the gradient material design of the transition layer achieves progressive matching of the coefficient of thermal expansion, fully absorbing the interfacial stress during thermal cycling and avoiding the risk of interlayer delamination, thereby ensuring the high stability and long service life of the semi-insulating properties of silicon carbide crystals. The microgroove array structure set on the outer surface of the inner liner layer is treated with pyrolytic carbon coating to construct a regular gaseous material transport path, reducing the tendency of polymorphic phase transitions at the crystal growth interface, thereby obtaining a highly uniform, inclusion-free silicon carbide single crystal structure.

The present invention provides a NbCr2 / MoSi2 gradient material for knives and scissors. The material is prepared by mixing and mechanical alloying the mixed powder required for each layer, followed by cold pressing to obtain a preform. Finally, multiple cumulative roll-forming passes are performed at a specific temperature to obtain the Laves-phase NbCr2 / MoSi2 gradient material for knives and scissors. The Laves-phase NbCr2 / MoSi2 gradient material obtained by the present invention exhibits sufficient reaction, high density, good bonding quality between gradient interfaces, and excellent performance.

The application provides a gradient material thickness measurement method and system based on laser ultrasonic dispersion spectrum, and relates to the technical field of laser measurement, and comprises the following steps: modulating excitation laser through an optical mask to form a transient grating with periodic intensity distribution, exciting ultrasonic waves with specific frequencies in a material to be measured by using the transient grating, and receiving Lamb wave signals generated by the structure of the material to be measured by using a laser interferometer for line scanning; performing two-dimensional Fourier transform on the Lamb wave signals to obtain a target dispersion curve; the target dispersion curve comprises a mapping relationship between signal frequencies and wave numbers; a sample pair composed of multiple groups of material thickness parameters and dispersion curve parameters is generated by using a transfer matrix algorithm, and a preset deep neural network is trained based on the sample pair until a loss function reaches a preset threshold range, so that a target neural network is obtained; and the target dispersion curve is input into the target neural network to obtain thickness parameters of the material to be measured.