97 results about "Materials science and technology" patented technology

The invention discloses an alloy functional material fatigue performance prediction model building method, and relates to the technical field of material scientificity, the method comprises the following steps: installing a sensor group on an alloy surface, using an instrument to collect alloy performance influence data, and transmitting the data to a data processor through a wireless network for preprocessing, data storage and analysis; the method comprises the following steps: constructing a load performance prediction model, calculating a thermal coupling fatigue damage coefficient and a multi-axial load fatigue damage coefficient, summarizing and calculating to obtain a composite fatigue damage coefficient, and carrying out preliminary evaluation on the composite fatigue damage coefficient and a safety fatigue damage threshold value. The environment corrosion influence coefficient is calculated by combining the corrosion influence data set and the precipitation object integral number, corrosion degree prediction risk assessment is carried out on the environment corrosion influence coefficient and the safety fatigue damage threshold value, finally, the comprehensive fatigue damage coefficient is obtained, comprehensive corrosion degree assessment and fatigue damage prediction are carried out, real-time early warning and optimization suggestions are provided, and the safety fatigue damage risk is improved. The safe use of the alloy material is ensured; the service life is prolonged.

The invention belongs to the crossing field of artificial intelligence and material informatics, discloses a multi-layer material knowledge graph construction method and system based on a large model, and solves the problems of low utilization rate of multi-modal information, flat knowledge representation, uncontrollable quality and insufficient entity alignment precision in the prior art. The method comprises the following steps: analyzing material science and technology literatures, extracting multi-modal information of texts, tables and images, and preprocessing the multi-modal information into structured data; constructing a three-layer semantic framework of a concept term layer, a material entity layer and a material data layer; extracting knowledge by a large model layer by layer to generate a triple, and performing multi-dimensional quality evaluation and dynamic threshold filtering; entity fusion is realized by adopting hybrid alignment of semantic embedding and literal similarity and large model discrimination, and an atlas is maintained by combining incremental updating and version management. According to the method, knowledge integrity and accuracy are improved, entity heterogeneous scenes in the material field are adapted, whole-process automation is achieved, and high-quality knowledge support is provided for material research and development and data sharing.

The invention relates to the technical field of material science, and particularly discloses a glaze performance evaluation method and system based on multiple application scenarios, and the method comprises the steps: obtaining the original data of the hardness value and wear loss of glaze, carrying out the standardization processing, calculating the hardness distribution index and wear resistance index, and carrying out the comprehensive analysis and classification of the glaze, thereby achieving the evaluation of the performance of the glaze. Qualified glaze and unqualified glaze are distinguished; then carrying out high-temperature stability test on the qualified glaze, and screening out the glaze with high thermal stability; and finally, a particle swarm optimization algorithm is adopted to search for an optimal solution of a hardness value and a wear loss regulation interval, and it is ensured that the glaze shows excellent performance in a changeable application environment. Through the systematic evaluation process, the problems of fuzzy standard, lack of scientific basis, poor performance consistency and low evaluation efficiency in a traditional evaluation method are solved, the consistency and reliability of glaze performance are effectively improved, the product quality is ensured, and the evaluation efficiency is remarkably improved.

The invention belongs to the technical field of material science, and relates to a generation method of a material formula, a target material, an automobile structural part, a vehicle, a device, a medium and electronic equipment. The method comprises the following steps: acquiring target performance data of a target material to be prepared; and inputting the target performance data into a pre-trained material large model, so that the material large model outputs formula data for preparing the target material and corresponding process data. The formula data and the process data of the preparation method are reversely deduced according to the target performance data required by the target material by utilizing the large material model, the large model is introduced into the field of material science, and the generation method of the reverse material formula realizing'target performance driving 'is provided without relying on a large number of manual experiment trials and errors; and the advantages of strong generalization ability and reasoning ability of the large material model are exerted, so that the research and development efficiency and success rate of new materials are improved, and the application scenarios of the large material model are enriched.

The invention relates to the technical field of material science, and particularly discloses a method for testing photoelectric and thermal characteristics of a semiconductor device, which comprises the following steps of: acquiring crystal impurity evaluation parameters of the semiconductor device to perform crystal impurity evaluation of the semiconductor device, and acquiring a crystal impurity interference correction value, the method comprises the steps of obtaining a thermal characteristic parameter set and a light characteristic parameter set of a semiconductor device, determining a test temperature array and a test light intensity array, determining a plurality of photo-thermal coupling test schemes based on the test temperature array and the test light intensity array, applying each photo-thermal coupling test scheme to the semiconductor device and obtaining an electrical characteristic tested data set, according to the method, the electrical characteristic tested value is calculated based on the electrical characteristic tested data set corresponding to each photo-thermal coupling test scheme, the optimal photo-thermal coupling test scheme is determined, the rationality and adaptability of formulating the photo-thermal coupling test scheme are improved, and it is ensured that the test result can reflect the characteristic performance of the semiconductor device in various environments.

The invention relates to the technical field of computational material science, in particular to a high-entropy ceramic phase change strengthened silver-based electric contact material component screening method, which comprises the following steps of: firstly, based on first principle calculation and Monte Carlo molecular dynamics simulation, combining experimental data correction, and screening out a (MgCoNiCuZn) O component proportion of which the phase change temperature is close to a silver melting point and the single-phase enthalpy value is high; secondly, dynamically simulating wetting behaviors of liquid silver and O with different component proportions (MgCoNiCuZn) through molecular dynamics, and selecting a component proportion with the best wettability with the liquid silver in combination with phase boundary energy calculation and wetting angle experimental verification; and finally, preparing a sample based on spark plasma sintering, actually measuring a wetting angle by using a seat drop method, and feeding back and correcting simulation parameters to form closed-loop optimization. The method is suitable for wettability collaborative optimization screening of a rare earth element doped high-entropy oxide system and liquid metal, proper components can be efficiently and accurately screened out, and the performance of the silver-based electric contact material is improved.

The utility model relates to the technical field of material science, and discloses a pair of lockable glasses, which comprises glasses legs, pile heads and locking components, one end of each glasses leg is rotatably connected with the corresponding pile head, the locking component is arranged at the joint of each glasses leg and the corresponding pile head, and the other end of each glasses leg is fixedly connected with one end of a leg sleeve. According to the lockable glasses, through the design of the locking assembly, on the basis that the glasses legs and the pile heads of the glasses are connected in an inserted mode, connection of the second connecting ends on the pile heads is preliminarily reinforced through first small metal and second small metal, and then connection of the first connecting ends on the glasses legs is reinforced through third small metal and fourth small metal; and finally, the fifth small metal is in threaded connection with the third small metal for fixation, and meanwhile, a self-locking nut is arranged in the third small metal, so that the fifth small metal can be prevented from rotating after being in threaded connection with the fifth small metal, the connection stability is guaranteed, and loosening or falling is not likely to happen. The design is particularly suitable for users who need to keep the glasses stable in sports or daily activities.

The invention belongs to the field of metal material scientific and technical processing, and relates to a processing method for remarkably improving the impact toughness of a TC32 titanium alloy bar. According to the method, the microscopic structure type of the TC32 titanium alloy is a double-state structure, a primary alpha phase is converted into an equiaxial shape or a long rod shape under the action of dynamic recrystallization and static recrystallization under the action of 845-890 DEG C thermal deformation and double annealing, the volume fraction is kept at 15%-35%, a beta conversion matrix comprises two alpha phases with different sizes, and the size of the beta conversion matrix is kept at 10%-20%. Wherein the alpha laths of the coarse lamella form an alpha cluster, the toughness of the alloy is improved, and the fine needle-shaped alpha laths are woven into a mesh basket structure, so that the strength of the alloy is improved. Besides, through the radial forging mode of single-pass small deformation and accumulated large deformation, fine grain uniform forging deformation of the alloy is achieved, the strength level of the bar can be maintained to be 1000 MPa or above, and the impact toughness can stably reach 80 J / cm < 2 > or above. In addition, the machining method is high in efficiency, the size precision is easy to control, batch production can be achieved, and the structure performance stability of different furnace batches is improved.

The invention discloses a recycled concrete permeability detection system and method, and relates to the technical field of material science, and the system comprises an electric field auxiliary module which applies a preset voltage gradient through an electric field auxiliary device, obtains initial ion concentration distribution data and a current change signal from a recycled concrete sample, and obtains a reference parameter of a permeation process; the modeling and simulation module is used for constructing a pore structure model by adopting a finite element simulation method according to the reference parameters, fusing an ion migration rate and a non-uniform distribution characteristic, and determining a dynamic regulation and control scheme under the action of an electric field; according to the recycled concrete permeability detection system and method, dynamic regulation and control and real-time monitoring of ion permeability behaviors are achieved, the barrier property evaluation precision of recycled concrete is remarkably improved, and efficient technical support is provided for durability optimization of engineering materials.

The present invention belongs to the field of material science and technology, and in particular, relates to a vacuum heat treatment process for a high-strength and tough titanium alloy workpiece. Compared with the prior art, the present invention performs solid solution at 30°C to 50°C below the phase transition point, at which time the primary α phase is precipitated inside the alloy, effectively increasing the strength performance, and then cools at an appropriate speed and keeps the temperature at a lower temperature, the alloy precipitates the secondary α phase, and by adjusting the heat treatment process parameters such as the cooling speed and the heating temperature to control the secondary α phase content, morphology and distribution, and size, etc., high strength is obtained while still retaining high plasticity, thereby obtaining a high-performance titanium alloy welded workpiece.

The invention discloses a high-pressure-resistant lead barium titanate-based thermal sensitive ceramic and a preparation method thereof, and belongs to the technical field of material science, a core layer of the high-pressure-resistant lead barium titanate-based thermal sensitive ceramic comprises the following raw materials in parts by mole: 2-5 parts of lead tetraoxide, 25-39 parts of barium carbonate, 30-45 parts of titanium dioxide, 0.03-0.3 part of manganese oxide and 0.2-0.4 part of niobium oxide; the shell layer comprises the following raw materials in parts by mole: 1-15 parts of a barium compound, 5-20 parts of a titanium compound, 0-3 parts of a strontium compound, 0-5 parts of a calcium compound, 0.5-5 parts of zirconium oxychloride and 1-8 parts of a tin compound; the preparation method comprises the following steps: mixing the raw materials of the core layer, calcining at 1000-1100 DEG C, adding a deionized water solution of the raw materials of the shell layer, mixing, spray-drying, calcining at 950-1050 DEG C, adding a polyvinyl alcohol water solution, granulating, forming, degumming and sintering. The ceramic prepared by the preparation method disclosed by the invention has high voltage-resistant characteristic and excellent PTC (Positive Temperature Coefficient) effect.

The invention relates to the technical field of material science, in particular to a porous liquid material based on an MIL-100 (Fe) base, preparation of the porous liquid material and application of the porous liquid material in extraction coupling oxidative desulfurization. The porous liquid material based on the MIL-100 (Fe) base is successfully prepared by compounding the MIL-100 (Fe) metal organic framework and the ionic liquid. The material not only retains the high specific surface area and excellent pore structure characteristics of MOF, but also shows liquid characteristics, the fluidity and adaptability of the material in the extraction process are remarkably improved, and the material is especially suitable for the continuous multi-stage extraction process in the industry; and the material can realize high-efficiency sulfide molecular adsorption and oxidative desulfurization reaction under wider operation conditions. Compared with a traditional solid MOF material, the material has remarkable advantages in the desulfurization process, including higher desulfurization rate (more than 90%), higher reaction speed and excellent cycle stability.

The invention discloses a training method, device and equipment of a hydrogen terminal diamond structure-spectrum-effect relationship prediction model and a readable storage medium, and relates to the technical field of material science. Comprising the following steps: firstly, obtaining structure parameters of the hydrogen terminal diamond, and carrying out first-principle high-throughput calculation on the structure parameters to obtain property parameters of the hydrogen terminal diamond; constructing a relevance data set between the structure parameters and the property parameters; then carrying out infrared spectrum calculation on the structure parameters of the hydrogen terminal diamond to obtain spectrum data of the hydrogen terminal diamond; constructing a mapping data set between the structural parameters and the spectral data; and finally, based on the relevance data set and the mapping data set, training a hydrogen terminal diamond structure-spectrum-effect relationship prediction model. According to the scheme, the high efficiency and accuracy of hydrogen terminal diamond structure-spectrum-effect relationship prediction are remarkably improved.

The invention discloses construction and application of a biosensor based on an efficient antifouling interface and dual signal amplification, and belongs to the technical fields of optical / electric analytical chemistry, biosensing and material science. According to the invention, the electrode interface is modified with polyaniline doped with polytannic acid as an antifouling film, so that non-specific adsorption of interfering biomolecules in a complex medium is resisted; euTb-MOF is prepared as an efficient luminous body, Tb < 3 + > can transfer energy of Tb < 3 + > and ligand to Eu < 3 + >, and effective signal self-enhancement is realized; according to the EuTb-MOF, the reduction of S2O8 < 2-> is promoted by utilizing the reversible conversion of valence states of Co < 2 + > / Co < 3 + > and Fe < 2 + > / Fe < 3 + > and the synergistic catalysis of Ag NPs, so that the electrochemical luminescence signal of the EuTb-MOF is further improved. Based on the above strategy, the constructed biosensor has high detection sensitivity and precision and long service life, the linear range is 10 fM to 100 nM, and the detection limit is as low as 3.62 fM.

This invention relates to the field of materials science and technology, specifically to an X-ray diffraction measurement system for silicon wafer oxide layers. The system includes a detector body for measuring dislocations in the silicon wafer oxide layer, a support stage fixed to the front of the detector body, and a support box for carrying the silicon wafer material. It also includes a transfer mechanism located on top of the support stage and a transmission component located on the left side of the top of the support stage for transporting the support box containing the silicon wafer material. This invention improves transmission stability by using magnetic attraction to limit the position of the support box carrying the silicon wafer material during transmission. It also facilitates the limiting of support boxes of different sizes, thereby facilitating the transmission of silicon wafer materials of different sizes and enabling the detection of silicon wafer materials of different specifications. Furthermore, the cooperation between the transmission component and the transfer mechanism facilitates the transmission of support boxes of different specifications, making it convenient for practical use.

The invention discloses a high-performance latent curing solvent-free adhesive for bonding an EPDM (Ethylene-Propylene-Diene Monomer) heat insulation layer and a carbon fiber composite material, and belongs to the technical field of advanced high polymer material science. Comprising the following components: epoxy-terminated modified hydroxyl-terminated rubber, epoxy resin, a curing agent and a vulcanizing agent, the epoxy-terminated modified hydroxyl-terminated polybutadiene rubber comprises the following components: isophorone diisocyanate (IPDI), hydroxyl-terminated polybutadiene rubber (HTPB), epoxy resin and a catalyst. Compared with adhesives widely used in the spaceflight industry in China at present, the high-performance latent-curing solvent-free adhesive has the characteristics of high adhesive strength and latent curing solvent-free property, the adhesive does not need to be prepared at present, the high-performance latent-curing solvent-free adhesive only needs to be coated on an EPDM heat insulation layer, is subjected to heating and pre-curing, and is covered with a release film to form a self-adhesive sheet, so that the self-adhesive sheet is formed; and during use, the release film covering the surface is torn off, the EPDM heat insulation layer is attached to the carbon fiber composite material, hot-pressing vulcanization is performed, and bonding is completed.

This utility model discloses an amorphous component placement device for a horizontal magnetic furnace, relating to the field of materials science and technology. The utility model includes a limiting frame, with a connecting plate slidably connected to the inner wall of the limiting frame. A placement mechanism is provided on the connecting plate, and a picking mechanism is provided on the limiting frame. The placement mechanism includes a sliding groove. By incorporating a clamping plate, and with a spring in a compressed state, the spring rebounds, pushing the sliding plate towards the placement box. Simultaneously, the sliding plate slides on a fixed rod, causing the clamping plate to move. The clamping plate then causes a slider to slide within the sliding groove. Through the clamping plate that can clamp the placement box, the placement box containing the amorphous components is fixed in position, ensuring the stability of the components within the furnace and guaranteeing the uniformity of the heating process, thereby improving the heating effect and component performance.

This invention belongs to the field of materials science and technology, and discloses a machine learning-based method and related apparatus for optimizing the mechanical properties of cyanate ester / quartz fiber. Using a trained neural network prediction model, it recommends the tensile modulus and tensile strength targets of cyanate ester corresponding to the tensile strength target of the cyanate ester / quartz fiber composite material. Using the trained machine learning model, it recommends the composition and process parameters of the cyanate ester corresponding to the tensile modulus and tensile strength targets. The recommended cyanate ester composition and process parameters are then screened to obtain the cyanate ester composition and process parameters corresponding to the tensile strength target of the cyanate ester / quartz fiber composite material. This invention can utilize limited production line data, reduce the number of experiments and costs, rapidly optimize cyanate ester performance, and thus obtain high-performance composite materials.

The present invention relates to an evaluation method, system and electronic equipment for the anti-penetration performance of cement-based materials, and belongs to the field of computational materials science and technology. The method comprises: performing ultrasonic detection on a plurality of cement-based materials, respectively obtaining the propagation speed of ultrasonic waves in different cement-based materials; detecting the normalized penetration depth and the opening diameter of cement-based materials; establishing a correlation equation between the ultrasonic propagation speed and the normalized penetration depth / opening diameter; substituting the ultrasonic propagation speed of the cement-based material to be evaluated into the correlation equation, and calculating its normalized penetration depth and opening diameter. The characterization system established by the present invention can accurately evaluate the anti-penetration performance of cement-based materials with different material compositions and different compressive strengths. Compared with traditional penetration experiments, the detection method can quickly and accurately evaluate the anti-penetration performance of cement-based materials of unknown components, and since it basically does not damage the test blocks, it can also greatly improve the accuracy and repeatability of the test.

The invention discloses a manufacturing method for recrystallizing semiconductor material silicon carbide, belongs to the technical field of material science, and aims to solve the problems that a material'dead zone 'possibly occurs, the cost is high, the technology is complex and difficult, and the rejection rate is relatively high when silicon carbide crystals are manufactured by a silicon carbide differential high-temperature vapor deposition method. Comprising the following steps that 1, 4-5 kg of 24-mesh high-purity silicon carbide, 2-3 kg of 100-mesh high-purity silicon carbide and 1-2 kg of differential silicon carbide are selected; 2, the high-purity silicon carbide selected in the step 1 is mixed and put into an electric furnace, and 2-3 kg of 100-mesh monocrystalline silicon is laid at the bottom of the electric furnace; 3, the temperature is increased to 1100 DEG C and kept for 1 h, then the temperature is increased to 1600-2200 DEG C, and heat preservation is conducted for 24-48 h; and 4, blowing out the furnace and discharging. The method is low in cost, simple in technology and high in economic benefit.

The invention provides a novel composite material and a preparation method thereof, and relates to the technical field of material science. The novel composite material is prepared from the following raw materials in percentage: 43.2 to 43.6 percent of magnesium oxide, 14.6 to 14.8 percent of magnesium chloride, 0.02 to 0.1 percent of citric acid and 41.7 to 41.9 percent of water. Wherein the magnesium oxide, the magnesium chloride and the water jointly react to generate 7Mg (OH) 2. MgC l 2.8 H2O, the raw material composition further comprises fibers and a filler, the fibers are filled according to 15%-20% of the total amount of the magnesium oxide, the magnesium chloride, the citric acid and the fibers, and the filler is filled according to the amount smaller than 10% of the total amount of the magnesium oxide, the magnesium chloride, the citric acid and the fibers. According to the invention, a novel composite material with excellent performance is successfully developed by optimizing the raw material ratio and the preparation method, the composite material is formed by compounding a plurality of inorganic and organic raw materials, not only has excellent mechanical properties, wear resistance and corrosion resistance, but also is simple and efficient in preparation method, and has relatively high industrial application value.

The utility model belongs to the technical field of material science, and particularly relates to a low-temperature co-fired ceramic dielectric material forming performance testing device which comprises a workbench, a fixing plate is fixedly installed on the side face of one end of the workbench, a fixing support is fixedly installed on the side face of the fixing plate, and a supporting plate is fixedly installed on the side face of the fixing support. A motor is fixedly installed at the top of the supporting plate, the output end of the motor penetrates through the interior of the fixing support and is fixedly provided with a threaded rod, a nut is installed outside one end of the threaded rod in a threaded mode, a first moving block is fixedly installed outside the nut, and fixing rods are fixedly installed at the two ends of one side of the fixing support. The motor drives the threaded rod to rotate, the threaded rod drives the first moving block to move, the first moving block drives the second moving block, and the second moving block moves to drive the clamp to move, so that the effect of fixing the detected object is achieved, and the consistency and reliability of the test result of the detected object are effectively improved.

This invention relates to the field of materials science and technology, and discloses a method for optimizing the composition of a chemical nickel plating solution for ceramic substrates. The method includes: analyzing target ratio combinations of key variables to establish an initial nickel plating solution; plating a preset ceramic substrate using the initial nickel plating solution, and recording the current pH value during the initial nickel plating process; analyzing the pH adjustment parameters of the initial nickel plating solution, marking the comprehensive lifetime score of the initial nickel plating solution under the pH adjustment parameters to determine the failure point of the initial nickel plating solution; performing nickel plating on the ceramic substrate using the initial nickel plating solution to obtain a nickel-plated ceramic substrate; identifying the critical load for plating peeling off the nickel-plated ceramic substrate to determine the adhesion of the nickel-plated ceramic substrate; analyzing the conductivity and corrosion resistance of the nickel-plated ceramic substrate; outputting the composition optimization parameters of the initial nickel plating solution; and performing composition optimization of the nickel plating solution based on the composition optimization parameters. This invention can improve the optimization effect of the nickel plating solution composition.

The present invention relates to the field of materials science and technology, and specifically relates to a high-strength cemented carbide and its preparation method and application, which includes the following steps: S1: Weigh the raw materials of tungsten carbide, cobalt, tantalum carbide, niobium carbide, titanium carbide, yttrium oxide, nickel, and trace strengthening elements according to a preset weight to form a mixture A; S2: Place the mixture A in a wet ball milling device for ball milling treatment; S3: Perform drying treatment on the ball-milled slurry; S4: Perform plasma activation treatment on the dried powder; S5: Press the activated powder to form a dense green compact; S6: Perform two-stage sintering treatment on the green compact in a vacuum sintering furnace; S7: After sintering is completed, perform cooling treatment; In the present invention, by optimizing the alloy formula and innovating the preparation process, the hardness, toughness, and high-temperature resistance of the high-strength cemented carbide are improved, and at the same time, the production process is simplified, and the overall performance and application versatility of the material are enhanced.

The present invention discloses an α-Fe2O3 / RGO / mpg-C3N4 nanocomposite material and its preparation method and application, belonging to the field of materials science and technology. The mpg-C3N4 material is modified in terms of morphology control, element doping, and heterostructure construction, and a Z-type heterojunction photocatalyst with a solid electron mediator is synthesized based on the mpg-C3N4. By controlling the synthesis conditions, a large specific surface area, visible light response, non-toxic and environmentally friendly α-Fe2O3 / RGO / mpg-C3N4 nanocomposite material is prepared. This nanocomposite material overcomes the inherent shortcomings of single semiconductors g-C3N4 and α-Fe2O3, such as small specific surface area, low charge carrier separation efficiency, and limited visible light absorption capacity. The structure and properties of the nanocomposite material are characterized by XPS, XRD, SEM, TEM, FT-IR, BET, UV-vis DRS, and Zeta potential analysis, proving the successful preparation of the material. It was used to photocatalytically degrade the explosive 2,4,6-trinitrotoluene. A series of exploratory experiments showed that under 12 hours of illumination, the photodegradation rate of TNT by 10wt% α-Fe2O3 / RGO / mpg-C3N4 nanocomposite material can reach 99.57%, which is better than other materials and methods.

This application discloses a method for obtaining the detonation velocity and detonation pressure of energetic materials based on atomic-scale dynamics, relating to the field of materials science and technology. The method includes: acquiring an initial configuration file of the energetic material to be tested, and performing dynamic processing on the initial configuration file using a materials simulation model to generate a first training dataset; iteratively training the potential function using the first training dataset to obtain a structure file corresponding to each generation of training; sampling and screening the structure files, and calculating the accuracy adjustment parameters corresponding to the sampled and screened structure files using first-principles calculation software; adjusting the parameters of the materials simulation model using the accuracy adjustment parameters, and using the adjusted materials simulation model to generate a second training dataset from the structure files obtained from each generation of training and the first training dataset; and predicting the performance of the energetic material to be tested based on the potential function trained on the second training dataset. A general method for predicting material properties that balances accuracy and efficiency is proposed.

The invention discloses a hard ceramic coating stress solving method, device and equipment and a medium, relates to the technical field of materials science, and aims to accurately capture the influence of a microstructure on the hard ceramic coating stress and improve the solving precision of the hard ceramic coating stress. The method comprises the steps that effective sampling point coordinates in at least one unit material area are obtained according to a microstructure image of the hard ceramic coating, and the microstructure image is used for presenting various detail features of the surface of the hard ceramic coating; the coordinates of the effective sampling points in the at least one unit material area are input into a pre-trained mechanical property analysis model, mechanical property parameters of the at least one unit material area are obtained through solving of the mechanical property analysis model, and the mechanical property analysis model comprises an auxiliary solving network and a parameter solving network; and calculating the stress value of the hard ceramic coating according to the mechanical property parameters of the at least one unit material area.

The invention belongs to the technical field of environmental engineering and material science, and particularly relates to a hydroxyl-containing zinc zeolite imidazole framework material as well as a preparation method and application thereof. The preparation method comprises the following steps: mixing a zinc precursor and an imidazole ligand in proportion by adopting a mechanochemical method, mechanically grinding under the assistance of a small amount of water, washing and drying. The obtained material is of a microporous structure, the specific surface area is 500-2000 m < 2 > / g, the particle size is 20 nm-50 [mu] m, and the defect rate is high. The method has the advantages that the preparation process is green, environment-friendly, rapid, efficient and suitable for mass production, and the coordination capability can be enhanced through the synergistic effect of hydroxyl and imidazole groups of the residual raw materials. The obtained material can be used for heavy metal ion adsorption, especially has high removal rate and high adsorption capacity (50-600 mg / g) for radioactive uranium elements, and has wide application prospects in the field of environmental restoration.

The utility model discloses a special net cap for enhancing stability of a transcranial Doppler headstock and probe contact. The special net cap comprises a cap body, an adjusting device and a fixing module, the cap body is connected with the fixing module; two ends of the adjusting device are respectively connected with the fixing module; the fixing modules are annular and are connected end to end; the size and distribution of meshes of the mesh cap are meticulously designed, so that the mesh cap can adapt to patients with different head shapes; when the net cap is worn, the contact pressure can be uniformly dispersed; meanwhile, an elastic space is provided for head movement, and probe displacement caused by head micro movement is reduced; the adjusting device can adjust the lengths of the second elastic band and the third elastic band according to the size of the neck to ensure that the net cap better fits the head of the patient; meanwhile, the headstock and the probe are covered by the net cap, so that the headstock and the probe are tightly attached to the head; the design is based on human engineering, modern material science and technology are combined, and examination equipment capable of guaranteeing the stability of the head frame and the probe and improving the comfort level of a patient is ingeniously created.

The invention discloses a preparation method of a high-zinc small-wall-thickness aluminum alloy profile for aviation, and belongs to the technical field of material science. Preparation: preparing a high-zinc aluminum alloy cast ingot; after two-stage homogenizing annealing, saw cutting and turning are conducted, and after heating, extrusion forming is conducted; and after two-stage solid solution quenching treatment, pre-stretching is conducted, then two-stage aging treatment is conducted, and a T76511-state profile, namely the high-zinc small-wall-thickness aluminum alloy profile for aviation, is obtained. According to the method, the two-stage homogenizing annealing and two-stage solid solution heat treatment processes are adopted, so that the structure property of the profile is more uniform and stable, and it is guaranteed that all properties of a final product meet standard requirements. The prepared high-zinc small-wall-thickness aluminum alloy profile has the advantages of being high in strength, good in corrosion resistance, resistant to corrosion and the like, the average tensile strength of the high-zinc small-wall-thickness aluminum alloy profile is 635 MPa which is 21 MPa higher than the product standard requirement, the average yield strength of the high-zinc small-wall-thickness aluminum alloy profile can reach 610 MPa which is 24 MPa higher than the product standard requirement, the requirement of amphibious aircrafts of special models for high-performance aluminum alloy materials is met, and the high-zinc small-wall-thickness aluminum alloy profile can be widely applied to the field of aerospace.