68 results about "Microstructure morphology" patented technology

The invention provides a laser deposition workpiece temperature field simulation and microstructure prediction method and system, and relates to the technical field of additive manufacturing. Constructing a finite element model of the deposition structure, and setting laser deposition parameters; constructing a heat source model and a surface growth model; selecting a material type and a calculation type, and setting the mass ratio of each element in the mixed powder as a deposition material, and the material thermophysical property parameters and the temperature gradient of the mixed powder; constructing a laminar fluid flow equation; constructing a non-isothermal flow equation and an equation that the surface tension coefficient changes along with the temperature; simulating a temperature field and a velocity field in the laser deposition manufacturing process; and according to the temperature field and velocity field distribution result, the temperature gradient and the solidification rate of each area in the sedimentary structure are calculated, and microstructure morphology prediction is carried out according to the temperature gradient and the solidification rate. The problem that in the prior art, it is difficult to predict temperature distribution and microstructure morphology of a deposited layer of the titanium-based composite manufactured through laser deposition is solved.

The invention discloses a selective laser melting simulation method simultaneously considering molten pool and microstructure evolution, which mainly comprises establishment and calculation methods of powder laying and a powder melting and solidification process model, and comprises the following specific steps: setting the geometric dimension and the number of internal crystal grains of a substrate to generate a polycrystalline substrate; establishing a discrete element model, simulating a roll shaft powder spreading process, and obtaining particle information; introducing a sequence parameter, constructing a free energy density functional, and establishing a heat-flow-microstructure strong coupling phase field model; constructing a powder bed geometric model, distributing grain orientation, and dividing grids for the powder bed geometric structure; setting material attributes and boundary conditions, and solving the phase field model by a finite element method; and carrying out visualization processing on a calculation result to obtain a molten pool and a microstructure morphology. Evolution behaviors of the molten pool and the microstructure in the selective laser melting process can be simulated at the same time, alternate simulation and data transmission of the powder laying process and the laser scanning process are achieved, and therefore actual machining production is guided, and technological parameters are optimized.

The invention discloses a method for printing a two-dimensional structure of a thermosetting material with controllable surface roughness. The method comprises the following steps: regulating and controlling the rheological property of the extrusion behavior of the selected thermosetting material; calculating and determining the relationship between the deposition morphology of the thermosetting material and the printing parameters, and drawing an H-V phase diagram to determine a critical printing interval for realizing uniform deposition; establishing a single fiber deposition morphology evolution model and a multi-fiber fusion geometric evolution model, and providing a correlation corresponding relation for the fusion degree and the surface microscopic roughness of adjacent deposition fibers, so as to obtain a preset surface microstructure morphology; and according to the required surface roughness, the interface is cured and locked through thermocuring at different fusion stages, so that the thermoset material two-dimensional film with continuously adjustable roughness and a stable structure is obtained. According to the invention, two-dimensional structure printing of any thermosetting material system on any spreading substrate can be realized, and the surface roughness can be continuously and programmably adjusted.

The invention discloses a tantalum-tungsten alloy microstructure morphology corrosive liquid and a using method thereof. The corrosive liquid is composed of aqua regia, hydrofluoric acid, hydrogen peroxide and sulfuric acid. The using method comprises the following steps: 1, preparing a tantalum-tungsten alloy microstructure morphology corrosive liquid; secondly, the ground and polished metallographic sample is placed in a tantalum-tungsten alloy microstructure morphology corrosive liquid to be etched; and 3, taking out, cleaning, drying, and observing under a metallographic microscope. According to the corrosive liquid, a synergistic effect is achieved through component design, a passivation film of the tantalum-tungsten alloy is attacked and damaged through multiple mechanisms, corrosion dynamic balance is controlled, a microstructure is kept clear, and the microstructure is highlighted through phase selective dissolution of acid, so that the corrosion resistance of the tantalum-tungsten alloy is improved on the premise that the microstructure is not damaged. The method has the advantages of high efficiency, easiness in control, simplicity in use, high efficiency and wide application range, and is suitable for the technical field of metal detection.

The invention belongs to the technical field of target materials, and particularly discloses a silver alloy target material and a preparation method and application thereof. The silver alloy target material comprises the following raw material components in percentage by weight: 99.25 to 99.93 percent of Ag, 0.05 to 0.55 percent of Ce, 0.01 to 0.05 percent of aluminum-copper alloy and 0.01 to 0.15 percent of manganese-copper alloy. On one hand, a certain amount of Ce, Al-Cu alloy and Mn-Cu alloy are added into Ag for microalloying; and on the other hand, the microstructure form is regulated and controlled in combination with forging and hot rolling treatment in the manufacturing process. And finally, on the premise that the reflectivity is not reduced, the vulcanization resistance and the oxidation resistance are greatly improved, the silver alloy target material has high hardness and is easy to process, the time for starting blackening vulcanization of the silver alloy target material is 8.0-11.2 hours, the time for starting blackening oxidation of the silver alloy target material is 7.5-10.6 hours, and the Vickers hardness of the silver alloy target material is 97-138.

The invention discloses a scheme for realizing strain sensor performance modulation based on laser-induced programming, and belongs to the technical field of flexible electronic device preparation. According to the method, different laser etching schemes are used according to the actual requirements of different application scenes, a substrate is induced to generate a specific microstructure morphology, and the thickness gradient of a surface metal film grown through subsequent chemical plating is influenced through the microstructure morphology. And finally, the stress distribution of the metal film in the stretching process is influenced by the thickness gradient to generate different crack morphologies, and the characteristic adjustment of the resistance change of the sensor is realized through the regulation and control of the crack morphologies. According to the scheme for realizing strain sensor performance modulation based on laser-induced programming provided by the invention, the effect of regulating and controlling the performance of the sensor as required is realized by using different laser etching modes and material proportions.

The invention discloses a method and a device for predicting spatial and temporal distribution characteristics of a microstructure of a nickel-based single-crystal high-temperature alloy under creep-oxidation interaction, and belongs to the technical field of high-temperature structural material service performance prediction.The method comprises the following steps: performing creep tests of different temperatures, stresses and durations based on vacuum and atmospheric environments respectively; obtaining microstructure morphology characteristics and microscopic parameter distribution in the nickel-based single crystal superalloy under different environments and test conditions; quantifying the spatial-temporal distribution evolution law of the volume fractions of gamma'phases in the creep samples under different temperatures and stresses in vacuum and atmospheric environments; establishing a periodic cell element model and a microstructure evolution model; and predicting the spatio-temporal evolution law of the channel width of the gamma-phase matrix in the stress creep sample at different temperatures in the atmospheric environment. According to the method, spatial and temporal distribution of the microstructure caused by interaction of creep and oxidation is considered, a microstructure evolution behavior prediction framework is constructed in combination with a physical mechanism, and the distribution rule of the microstructure is accurately described.

The invention relates to the technical field of aluminum alloys, in particular to a method for enhancing the strength and plasticity of an aluminum alloy, which comprises the following steps: carrying out ultrasonic vibration and high-pressure co-treatment on the aluminum alloy to separate out a precipitation strengthening phase in the aluminum alloy and uniformly distribute the precipitation strengthening phase. According to the method, ultrasonic vibration and high-pressure treatment modes are combined, and the microstructure morphology and precipitate distribution of the aluminum alloy are promoted by utilizing the precipitation strengthening characteristic in the aluminum alloy strengthening process, so that the comprehensive performance of the aluminum alloy is improved; the yield strength and the tensile strength are remarkably improved while the elongation of the aluminum alloy is kept basically free of loss, and the problem of contradiction between the strength and the plasticity of the material is effectively solved; compared with the traditional heat treatment method, the method disclosed by the invention can be carried out at room temperature, reduces the aging heat treatment link, reduces the emission of harmful substances, is more energy-saving and environment-friendly, is simple and feasible in treatment process, has higher economical efficiency and industrial application prospect, and lays an important foundation for the application of the production process.

The present invention belongs to the field of target material technology, and specifically discloses a silver alloy target material, its preparation method and application. The raw material components of the silver alloy target material include, by weight percentage: Ag 99.25-99.93%, Ce 0.05-0.55%, aluminum-copper alloy 0.01-0.05%, and manganese-copper alloy 0.01-0.15%. On the one hand, the present invention performs microalloying by adding a certain amount of Ce, Al-Cu alloy and Mn-Cu alloy to Ag; on the other hand, the microstructure morphology is regulated by combining forging and hot rolling treatments during the manufacturing process. Ultimately, without reducing the reflectivity, a significant improvement in anti-sulfurization and oxidation performance is achieved, and the target material has high hardness and is easy to process. The silver alloy target material starts to turn black and sulfurized in 8.0-11.2 hours, starts to turn black and oxidized in 7.5-10.6 hours, and has a Vickers hardness of 97-138.

The present invention belongs to the field of oxide layer thickness analysis, and relates to a method for evaluating the oxide layer thickness around high-temperature holes of film holes in nickel-based single crystal alloys. The angle value of the film holes of the initial sample of the nickel-based single crystal alloy is obtained; the initial sample containing the film holes is subjected to aging tests of different times to obtain metallographic samples, and the microstructure morphology and aging test time of the metallographic samples are obtained; the average thickness of the oxide layer of the metallographic samples is obtained according to the microstructure morphology; and a new oxidation kinetic equation is established by fitting the existing oxidation kinetic equation according to the angle value of the film holes, the aging test time, and the average thickness of the oxide layer. By introducing the angle influencing factor, the present invention can more accurately predict the oxide layer thickness at different angles, more accurately describe the growth law of the oxide layer thickness of nickel-based single crystal alloys under high-temperature aging conditions, and improve the accuracy and reliability of the prediction.

The invention relates to the technical field of bonding wires, in particular to a grain corrosion method of a bonding silver wire and application of the grain corrosion method. The grain corrosion method of the bonding silver wire comprises the following steps: carrying out low-temperature rapid annealing on the bonding silver wire subjected to large deformation to obtain the annealed bonding silver wire; performing first corrosion on the annealed bonding silver wire by adopting a first corrosive liquid, and oxidizing and / or vulcanizing the surface of the annealed bonding silver wire to obtain a pre-corroded bonding silver wire; and carrying out second corrosion on the pre-corrosion bonding silver wire by adopting second corrosion liquid so as to display a microstructure. By means of the method, effective corrosion of the extremely-fine bonded silver wire metallographic specimen subjected to large deformation can be achieved, and the microstructure morphology is shown.

The present application relates to the technical field of titanium alloy material engineering, and particularly relates to a yield strength calculation method based on the microstructure of titanium alloy with basket weave structure. The yield strength of titanium alloy with basket weave structure is divided into matrix strength, solid solution strengthening effect, grain boundary strengthening effect, dislocation strengthening effect and alpha phase precipitation strengthening effect. The present application innovatively designs a more accurate alpha phase precipitation strengthening model, and designs a circumscribed rectangle length-width statistical method and a phase microstructure weighting algorithm based on area for auxiliary statistics. The traditional method converts lamellar alpha phase into an equal-area circle to consider the strengthening effect. The present application fits the lamellar alpha phase into a long-axis rectangular part and a short-axis two-semicircle part. Compared with the traditional method, the yield strength calculation method based on the microstructure of titanium alloy with basket weave structure in the present application is more close to the actual situation, the statistical method is more accurate and reliable, the result has a smaller error with the actual result, and can be used in the engineering technical fields of titanium alloy microstructure design and performance control.

The invention belongs to the technical field of alloy stability analysis, and relates to a nickel-based single crystal alloy gamma'phase evaluation method based on coarsening kinetics. According to the method, the air film hole with the preset angle is machined in the initial sample of the nickel-based single crystal alloy. Carrying out aging tests of different preset times on the nickel-based single crystal alloy sample after the air film holes are processed at a preset temperature; preparing a metallographic sample according to the initial sample after the aging test; the microstructure morphology of the gamma'phase of the metallographic sample is obtained; according to the microstructure morphology, carrying out statistics on gamma'phase average size data of a gamma 'phase in the metallographic specimen under different preset angles and different aging time conditions; and fitting a new coarsening kinetic equation and a gamma'phase strengthening coarsening activation energy formula containing the gas film hole with the angle, evaluating the size of the gamma 'phase by using the new coarsening kinetic equation, and evaluating a gamma' phase activation energy rule by using the gamma 'phase strengthening coarsening activation energy formula containing the gas film hole with the angle. And accurate evaluation of the nickel-based single crystal alloy gamma'phase size and the coarsening activation energy is realized.

The invention relates to the field of nickel-based superalloy welding manufacturing, in particular to a nickel-based superalloy welding joint structure prediction method based on multi-scale simulation. The method aims at solving the key problems that nickel-based superalloy is poor in weldability, and joint structure simulation and prediction exist in the welding production and manufacturing process. The microstructure evolution process of the nickel-based high-temperature alloy welding joint is quantitatively calculated and analyzed by establishing a multi-scale nickel-based high-temperature alloy welding joint microstructure simulation model, so that the microstructure morphology prediction of the joint under different welding process parameter groups is realized. The multi-scale nickel-based superalloy welding joint structure simulation model is combined with actual welding process conditions, so that the grain morphology can be effectively improved, welding defects are reduced, the joint performance is improved, the service life of the joint is prolonged, and effective guidance can be provided for the welding process and product quality optimization of a nickel-based superalloy welding structure.

This invention discloses a phase-field method for controlling creep microstructure through lattice strain using an interface-based input / output system. This method provides a visual input / output interface, enabling direct input / output of parameters and computational data. By establishing a dual-sublattice thermodynamic model coupled with a crystal phase-field kinetic model, and setting initial kinetic and thermodynamic parameters, the creep microstructure morphology is controlled by altering the coherent mismatch degree between the precipitated phase and the matrix phase, as well as the magnitude of external stress and strain. This invention, while enabling control of creep microstructure morphology, also includes a visual operating interface, making the computer simulation process more convenient and efficient. The combination of the crystal plastic phase-field method and the operating interface module yields rich simulation results, providing theory and methods for establishing the relationship between creep microstructure and strain in high-temperature alloys, as well as for the optimization design of microstructure control.

The invention relates to a preparation method of a titanium alloy super-thick-wall hot-rolled pipe, which comprises the following steps: S1, freely forging a titanium alloy cast ingot into a bar blank, and forging heating number is not less than four; s2, the bar billet is placed in a heating furnace to be heated in a sectional mode; s3, after heating is stopped, the bar is cooled to the room temperature in the furnace; s4, repeating the steps S2-S3 for two to three times; s5, the bar billet is heated again; s6, the heated pipe blank is subjected to cross piercing; s7, the hot-rolled perforated pipe directly enters a heat preservation sleeve; s8, hot air precooling is conducted on the surface of the heat preservation sleeve; s9, the perforated pipe is taken out of the heat preservation sleeve and air-cooled to the room temperature; and S10, the perforated pipe is sequentially subjected to annealing, straightening, machining and flaw detection, and then the finished titanium alloy super-thick-wall seamless pipe is obtained. The titanium alloy super-thick-wall hot-rolled pipe prepared through the method has the dual-state structure morphology, meanwhile, the high surface quality and the high yield are achieved, and more excellent deformation performance is provided for subsequent machining.

The present invention belongs to the technical field of nonferrous metal material preparation, and discloses a light alloy semi-solid melt preparation and injection extrusion casting molding equipment and method. The equipment includes an intelligent melt microstructure prediction module, a melt preparation unit, and an extrusion casting molding unit. The method includes the steps of equipment preheating, semi-solid melt preparation, injection feeding, and extrusion casting molding. The present invention achieves seamless docking between the melt preparation unit and the extrusion casting molding unit, realizing an integrated process from preparation to molding of the semi-solid melt. By coupling a unified phase field model to predict the changes in microstructure morphology under different process parameters during the semi-solid melt preparation process, the optimal process parameters of the semi-solid melt preparation process are determined, and the melt preparation process is optimized. This is of great significance for improving the controllability of the semi-solid melt, the stability of the semi-solid molded castings, and the product quality.

The present invention relates to the technical field of arc additive manufacturing, and particularly to a method for additive manufacturing of heterogeneous dual-wire arc of NiTi-based shape memory alloy. The manufacturing method is to feed NiTi alloy wire and metal wire simultaneously through a dual-wire arc additive device, and use an ultra-high frequency pulsed TIG welding power source to realize the additive manufacturing of heterogeneous dual-wire arc of NiTi-based shape memory alloy. The present invention is used to solve problems such as low phase transformation temperature and large phase transformation hysteresis in existing arc additive manufacturing technology. Moreover, the ultra-high frequency pulsed TIG arc can improve the microstructure morphology, thereby being beneficial to stabilizing and improving the performance of NiTi-based alloys, broadening the application fields of NiTi-based ternary alloys, and providing an effective solution for arc additive manufacturing of NiTi-based shape memory alloys.

This invention discloses a method for printing two-dimensional structures of thermosetting materials with controllable surface roughness, comprising: controlling the rheological properties of the extrusion behavior of a selected thermosetting material; calculating and determining the relationship between the deposition morphology of the thermosetting material and printing parameters, and plotting an H-V phase diagram to determine the critical printing range for achieving uniform deposition; establishing a single-fiber deposition morphology evolution model and a multi-fiber fusion geometric evolution model to provide a correlation between the degree of fusion of adjacent deposited fibers and the surface micro-roughness, thereby obtaining a preset surface microstructure morphology; and, according to the required surface roughness, solidifying and locking the interface through thermal curing at different fusion stages to obtain a continuously adjustable and structurally stable two-dimensional film of thermosetting material. This invention can realize the printing of two-dimensional structures of any thermosetting material system on any spread substrate, and can continuously and programmably adjust the surface roughness.

The invention discloses an HAR microstructure morphology restoration method based on a modulation aberration data model, which avoids using expensive devices such as a deformable mirror to compensate aberration in the process of measuring a microstructure by near-infrared microscopic interferometry, avoids an aberration detection link, achieves transient response and accelerates the characterization process of a sample to be detected. On the basis of a BP neural network, a modulation aberration data network is constructed, errors are transmitted layer by layer through training, so that network parameters are corrected, a modulation aberration data model is constructed and optimized, required modulation aberration data are obtained through prediction according to characteristic parameters of a sample to be tested, a virtual phase filter is constructed, and accordingly aberration of an HAR microstructure interferogram is corrected. And finishing the morphology restoration of the HAR microstructure. The modulation aberration data model is continuously iterated and updated, accidental errors are avoided, and the robustness of the correction algorithm is higher.

The invention discloses a 3D printing deposition layer microstructure morphology prediction method which comprises the following steps: firstly, carrying out a multilayer deposition physical experiment, and collecting experimental data; building a finite element simulation model based on a physical experiment, and carrying out machine learning model calibration; building a machine learning model, and predicting by using the machine learning model to obtain a cooling rate matrix; the cellular automaton iteratively simulates a crystal grain evolution process based on a cooling rate matrix predicted by a machine learning model, and microstructures are predicted; according to the method, deep learning and the cellular automaton are combined to predict the microstructure morphology of the 3D printing deposition layer, and the problems that in the prior art, microstructure prediction depends on complex physical modeling, efficiency is low, and adaptability is poor can be solved.

A material surface three-dimensional microstructure morphology obtaining method comprises the steps that a sample is scanned through an OCT system, three-dimensional interference spectrum signals are collected, and complex signals containing sample structure information and a three-dimensional OCT image are obtained; extracting material surface contours from all B-scan images in the three-dimensional OCT image, removing material substrates and noise signals, extracting phase information of complex signals, and generating a phase difference image; and finally obtaining the three-dimensional microstructure morphology on the surface of the material. Compared with the prior art, the method has the advantages and beneficial effects that the method is simple and efficient, non-contact three-dimensional imaging of micron-scale and nano-scale microstructures of any curved surface or plane material surface can be quickly realized, the three-dimensional microstructure morphology of the material surface is obtained, and computing resources are saved.

The present invention discloses a Sn-Zn lead-free solder containing Ag, Bi, and Ge and a preparation method thereof, belonging to the field of soldering materials of electronic materials. The present invention regulates the microstructure morphology, phase composition, and melting properties of the solder alloy by controlling the content of Ag, Bi, and Ge elements in the solder, and provides a preparation method of the Sn-Zn lead-free solder containing Ag, Bi, and Ge. The solder is prepared by a three-master alloy mixing method. Compared with the traditional melting and casting method, the solder alloy has a uniform structure, accurate composition, simple process, and cost savings, and the solder alloy has improved wettability, antioxidant properties, and corrosion resistance. The solder can be used for brazing microelectronic chip circuit boards of electrical equipment serving in high-temperature and high-humidity environments.

The present invention discloses a global continuous modeling method for the real microstructure of a composite material. The microstructure morphology of the composite material is obtained by a scanning electron microscope and saved as a digital image; the digital image is decolorized by an image processing software, and the minimum and maximum values ​​of the output brightness value are set to increase the contrast; a geometric model of the corresponding size of the digital image coverage area is established; based on the decolorization map and the material parameters of each single phase or component of the composite material, a spatial distribution function of the material parameters in the entire domain of the composite material is established, and the material parameter items of the numerical model are assigned; according to conventional simulation means, grid division, physical field definition, boundary condition and initial condition setting and numerical solution are completed in sequence. The present invention can not only extract the microstructure of the material with higher resolution, but also automatically define the material parameter values ​​corresponding to different phases or components in the entire domain at one time based on the real microstructure, significantly reducing the error rate and distortion rate during modeling.

The invention discloses a preparation method of an ultra-thin electrolytic copper foil, and belongs to the field of electronic circuits and lithium ion battery copper foils. According to the method, a non-traditional conductive material is used as a carrier, and the ultra-thin electrolytic copper foil is prepared in a chemical plating mode and an electro-deposition mode in sequence. The non-traditional conductive material is one or more of glass, ceramic and plastic. According to the novel preparation process, materials with different surface roughness are adopted as carriers, introduction of a stripping layer in a traditional process can be abandoned, and a series of production problems caused by the stripping layer and the problems of impurity invasion, failure and the like caused by introduction of heterogeneous substances are avoided; and the surface performance of the ultra-thin copper foil can be further regulated and controlled by controlling the subsequent electro-deposition process so as to meet different application scenes (thickness, roughness, tensile property and the like), the microstructure morphology of the copper foil can be further regulated and controlled by adding an additive into the plating solution, and the method has high industrial application value.

The present disclosure is applicable to the technical field of solar power generation. Provided are a solar cell and a photovoltaic module. The solar cell comprises a silicon substrate, wherein the rear surface of the silicon substrate is provided with a first texture structure; and a side face of the silicon substrate is provided with a second texture structure, both the first texture structure and the second texture structure presenting a frustum-like microstructure morphology, the first texture structure comprising several first micro-polygonal frustums, the second texture structure comprising several second micro-polygonal frustums, and the size of each first micro-polygonal frustum being smaller than the size of each second micro-polygonal frustum. By means of the above arrangement, texturing is first performed on the front, back and side faces of the silicon substrate to generate the first texture structure, and then etching is performed again on the basis of the first texture structure on the side face of the silicon substrate to generate the second texture structure, so as to etch away an emitter layer material and a doped polysilicon layer material that have permeated and spread to the side face of the silicon substrate, thereby preventing a short circuit from being caused by an emitter layer and a doped polysilicon layer on the back face coming into contact on the side face of the silicon substrate.

This invention relates to the field of heat treatment technology for metallic materials, and discloses a method for controlling the microstructure and mechanical properties of welded thick titanium alloy plates. The method includes the following steps: providing a titanium alloy welded joint obtained by a narrow-gap welding method; performing stress-relieving annealing on the welded joint to obtain a primary part; and subjecting the primary part to a secondary annealing heat treatment in the two-phase region of the titanium alloy, the secondary annealing heat treatment comprising multiple cycles of heat treatment to eliminate acicular martensite in the fusion zone of the primary part and to equiax the acicular structure, thereby obtaining a finished part. This invention can effectively eliminate acicular martensite within coarse grains in the fusion zone of the welded joint, promoting the transformation of the acicular structure into a uniform and fine equiaxed structure, effectively improving its strength and plasticity, and significantly improving the microstructure morphology and mechanical properties of the fusion zone.

This invention relates to a superlens and its manufacturing method. The method includes: obtaining a wafer; the wafer comprising a substrate, a target layer on the substrate, a silicon nitride layer with openings in the target layer, and a hard mask material filling the openings; removing the silicon nitride layer by wet etching with an etchant under target heating conditions, the etchant being phosphoric acid with added bubble-generating agent, the bubble-generating agent decomposing to generate bubbles under the target heating conditions; and etching the target layer using the hard mask material as an etching mask to form multiple columnar microstructures. This invention adds a bubble-generating agent that decomposes upon heating to the phosphoric acid used for wet etching of the silicon nitride layer. The bubbles create turbulence in the etchant, promoting mass transfer and preventing the aggregation of silicate etching byproducts, effectively controlling the precipitation at the ends of the hard mask material, thereby obtaining a good columnar microstructure morphology.

The invention relates to a nickel-based single-crystal high-temperature alloy heat treatment process optimization method based on high-throughput experiment and machine learning, which comprises the following steps: constructing a multi-section solid solution temperature-time gradient window by taking as-cast nickel-based single-crystal high-temperature alloy as a starting point; batch vacuum-packaged samples in the window are synchronously fed into the furnace, are heated section by section, are immediately quenched after heat preservation, and are quickly frozen to corresponding tissues; measuring the Re element segregation ratio, the shrinkage porosity and porosity ratio and the eutectic content ratio of each section of the sample, and establishing a temperature-time-tissue data set; and inputting the optimal heat treatment parameters into a machine learning model for training, carrying out cross validation and fusion, reversely predicting the optimal heat treatment parameters capable of simultaneously meeting target tissue indexes, and finally verifying an optimization effect through a high-temperature mechanical test. Compared with the prior art, the method has the advantages that the element segregation improvement and microstructure morphology of the solid solution product are quickly learned by utilizing machine learning, so that the optimal solid solution process or heat treatment process of the single-crystal high-temperature alloy can be quickly predicted.

The application discloses Janus structure MXene-CNF aerogel as well as a preparation method and application thereof. The Janus structure MXene-CNF aerogel comprises a CNF layer and a MXene-CNF layer, wherein the CNF layer and the MXene-CNF layer can be self-assembled to form a Janus structure. The Janus structure MXene-CNF aerogel provided by the application is composed of the CNF layer with a porous microstructure morphology, low thermal conductivity, low light absorbance and high infrared emissivity, and the MXene-CNF layer with a sheet layer microstructure morphology, higher thermal conductivity, high light absorbance and low infrared emissivity, and can be widely applied to the thermal management field through the difference of the double-layer optical properties, physical properties and thermal conductivity, and meanwhile, the preparation process is simple, green, energy-saving and low in price, and can meet the demand of industrial production.