395 results about "Thermal barrier coating" patented technology

The invention discloses a thermal shock failure prediction and laser repair device for a thermal barrier coating and an application method. The device comprises a multi-physics field coupling simulation analysis module, a thermal shock experiment loading module, an online damage monitoring and failure diagnosis module, a robot laser repair execution module and a central control and data processing core unit. A thermal-mechanical-chemical coupling model is established to predict a coating failure behavior, a high-frequency induction heating and gas quenching system is adopted to simulate an extreme thermal shock environment, a multi-band thermal infrared imager, an ultrasonic probe and a digital image related system are integrated to monitor damage evolution in real time, and in-situ repair of a damaged area is realized based on a six-degree-of-freedom industrial robot. According to the method, the whole-process closed-loop control from failure prediction to repair regeneration is realized, the problems of single function and lack of multi-field coupling analysis and real-time repair capability in the prior art are solved, and the service reliability evaluation precision and the remanufacturing efficiency of the thermal barrier coating are remarkably improved.

The invention discloses an infrared temperature measurement calibration method and device for a CMAS high-temperature corrosion thermal barrier coating. The method comprises the following steps: preparing a thermal barrier coating sample coated with CMAS and provided with holes in the side surface; placing the sample in a high-temperature furnace, and inserting a high-temperature thermocouple into the sample temperature measuring hole; adjusting the high-temperature infrared thermometer to align a temperature measuring light path of the high-temperature infrared thermometer with a to-be-measured area on the surface of the sample; heating the high-temperature furnace to a preset temperature and preserving heat; and comparing thermocouple and infrared temperature measurement data in real time, adjusting the infrared emissivity to enable the difference between the thermocouple and the infrared temperature measurement data to be within a preset error range, and determining the infrared emissivity parameter of the sample at the temperature. According to the method provided by the invention, the infrared temperature measurement parameters of the thermal barrier coating under different CMAS corrosion conditions can be accurately calibrated, so that the corresponding infrared emissivity is obtained, and a key technical support is provided for checking and evaluating the high-temperature CMAS corrosion service life of the thermal barrier coating and testing the reliability of the service life. Meanwhile, the device adopted by the invention is simple in structure, simple and convenient to operate, accurate and effective in test result and good in application value.

The invention discloses a method for quantitatively evaluating the CMAS corrosion resistance of a thermal barrier coating, which comprises the following steps: uniformly coating CMAS on the surface of the thermal barrier coating, and carrying out corrosion treatment according to set temperature and time; the corroded thermal barrier coating is subjected to longitudinal linear cutting, and the cut section is gradually ground and polished; sEM characterization is conducted on the polished cutting section, and an SEM image is shot for further quantitative analysis; based on the obtained SEM image, the corrosion depth of the CMAS in the thermal barrier coating is measured; selecting at least one identification area in the CMAS corrosion area, and calculating the area of the CMAS phase in each identification area; and calculating the corrosion degree C of the CMAS to the thermal barrier coating based on the proportion of the CMAS phase area in the identification area. The method is simple and easy to operate, the proportion of the area corroded by the CMAS in the corrosion area is introduced as a key evaluation index on the basis of corrosion depth measurement, and a unified, reliable and quantifiable standard is provided for objectively and quantitatively evaluating the CMAS corrosion resistance of the thermal barrier coating.

The invention discloses an automatic grading device for thermal shock cracks of a coating and an application method. Comprising a terahertz wave detection module, a laser ultrasonic excitation and detection module, a high-precision three-dimensional motion control platform, a multi-mode signal synchronous acquisition and processing unit, a crack intelligent grading evaluation unit, an environment simulation and temperature control unit, a protective shell and a human-computer interaction interface. The near-surface dielectric property change of the coating is represented through the terahertz technology, the deep mechanical property evolution is detected through the laser ultrasonic technology, the thermal shock service condition is reproduced in combination with a high-temperature environment simulation unit, and a multi-modal feature fusion algorithm and a physical model and machine learning collaborative inversion model are adopted to obtain the thermal shock resistance of the coating. And automatic quantitative evaluation and severity grading of the depth, density, length and network connectivity of the thermal shock cracks of the thermal barrier coating are realized. The problems that an existing single detection method is insensitive to vertical cracks, poor in high-temperature environment adaptability and low in manual evaluation efficiency are solved.

The invention discloses a data-driven high-infrared-radiation-characteristic high-entropy rare earth tantalate material screening method and application, and belongs to the technical field of thermal barrier coating materials. The method aims at breaking through the infrared radiation performance bottleneck of a traditional rare earth tantalate ceramic material, a high-precision prediction model of the infrared emissivity of the rare earth tantalate is innovatively developed by constructing a multi-system common data set, and rapid evaluation of the infrared spectral characteristics of the A-site high-entropy rare earth tantalate RE3TaO7 material is achieved. On the basis of the model, a multi-element rare earth tantalate system which comprises (Y < 0.2 > Dy < 0.2 > Gd < 0.2 > Sm < 0.2 > Nd < 0.2 >) < 3 > TaO7 and (Nd < 0.2 > Eu < 0.2 > Dy < 0.2 > Er < 0.2 > Yb < 0.2 >) < 3 > TaO7 and has excellent infrared radiation characteristics is successfully screened out. According to the method, the limitation of traditional small sample material research is broken through through big data modeling, and an efficient theoretical design normal form is provided for developing a novel high-entropy infrared radiation material.

Disclosed in the present invention is a spraying fixture for a combustion liner of a combustion chamber of a gas turbine, relating to the technical field of spray tooling. The spraying fixture comprises a clamping unit comprising an abutting component abutting against a port of the combustion liner, a grating component arranged at the circle center position of the abutting component, the lower end of the grating component extending to a position below the abutting component, and eight clamping members arranged on the abutting component and annularly distributed using the grating component as the circle center. The present invention can achieve stable and effective clamping of the combustion liner of the combustion chamber of the gas turbine during manufacturing for an inner surface thermal barrier coating layer, ensuring the stability thereof during spraying; furthermore, by means of a grating design, a channel for communicating the interior of the combustion liner with external air is increased, the efficiency of cooling the wall of the combustion liner is improved, and the clamping and fixing range of the device can be adjusted on the basis of the actual size of the port of the combustion liner, thereby meeting more use requirements.

The invention belongs to the technical field of nuclear power, and particularly relates to a nuclear power plant equipment coating heat conductivity coefficient prediction method and device. According to the model building disclosed by the invention, the common defects of pores and macroscopic horizontal cracks in the coating are considered, the coating is used as a tight skeleton, pore and crack three-phase composite system, and after one defect is gradually added into the substrate, the formed system becomes a new substrate in the next step. And repeating the compounding process until the two defects of pores and cracks are added into the system. Therefore, the actual operation state of the thermal barrier coating of the nuclear power equipment can be simulated more vividly. Furthermore, pore shape influence factors and crack shape influence factors corresponding to different porosities and crack rates can be determined through modeling and heat conductivity coefficient simulation calculation, and the actual heat conductivity coefficient of the coating is further predicted. And a theoretical basis is provided for researching the failure behavior of the service thermal barrier coating.

The invention discloses a double-probe film thickness and defect collaborative decoupling method. The method comprises the steps that microwave reflection signals of a thermal barrier coating are synchronously collected through a coaxial resonance probe and a CSRR resonance ring probe; the microwave reflection signal comprises reflection coefficient amplitude, reflection coefficient phase and resonant frequency; constructing a frequency deviation model based on the microwave reflection signal; training the dual-channel deep learning network based on the frequency deviation model to obtain a trained dual-channel deep learning network; and obtaining film thickness information and a defect positioning result based on the trained dual-channel deep learning network. According to the method, collaborative decoupling of the film thickness and the defect signal is achieved through a physical-data fusion method, effective decoupling and independent recognition of the coating film thickness change and the defect response signal are achieved, and the resolution ratio, the accuracy rate and the practicability of a detection system are improved.

The invention relates to the field of suspension plasma spraying, in particular to a long-service-life suspension plasma spraying thermal barrier coating based on a platinum-aluminum coating and a preparation method of the long-service-life suspension plasma spraying thermal barrier coating. The preparation method comprises the following steps: preparing a vertical crack or columnar-like structure ceramic layer on the surface of a platinum modified aluminide bonding layer with lower roughness by using suspension slurry prepared from fully-stable tetragonal phase yttrium oxide stabilized zirconium oxide powder and adopting suspension plasma spraying suspension, so as to obtain a thermal barrier coating system with long service life. The problems that in the prior art, due to stress existing between a ceramic layer prepared through plasma spraying and a low-roughness platinum modified aluminide bonding layer, cracks are continuously formed and expanded at an interface, and the service life of a thermal barrier coating system is short are solved. The long-life thermal barrier coating system can be prepared on the platinum modified aluminide bonding layer through suspension plasma spraying.

The invention provides a CMAS corrosion resistant thermal barrier coating and a preparation method thereof.The CMAS corrosion resistant thermal barrier coating comprises a metal bonding layer, an yttria-stabilized zirconia layer and a multi-component rare earth zirconate layer, and the yttria-stabilized zirconia layer and the multi-component rare earth zirconate layer are sequentially arranged on the metal bonding layer. The multi-component rare earth cerate layer and / or the CMAS barrier layer are / is sequentially arranged on the multi-component rare earth zirconate layer; the multi-component rare earth zirconate layer comprises multi-component rare earth zirconate, the chemical formula of the multi-component rare earth zirconate is (nRE1 / n) 2Zr2O7, RE is any n of Sc, Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu, and n is not smaller than 10; the CMAS barrier layer includes an anti-corrosion oxide having an optical basicity of 0.55 to 0.68. The CMAS corrosion resistant thermal barrier coating disclosed by the invention realizes high thermal insulation, sintering resistance and CMAS corrosion resistance, reduces the surface temperature of a matrix alloy, and improves the sintering resistance and CMAS corrosion resistance of ceramics.

A method for testing the heat insulation performance of a thermal barrier coating comprises the following steps: preparing a set of plasma flame spraying equipment, preparing a metal sheet, and spraying the thermal barrier coating on the surface of the metal sheet to prepare a coating sample; preparing a high-temperature electric furnace and an aluminum oxide fiberboard with the same size as a furnace door brick, embedding the metal sheet into the aluminum oxide fiberboard, and exposing the coating surface and the back surface of the metal sheet; opening a furnace door of the high-temperature electric furnace, sealing the furnace door by using the cut aluminum oxide fiber plate as a furnace door brick, and embedding the metal sheet into the aluminum oxide fiber plate in the direction that the coating surface faces the interior of the furnace; setting a heating program of the electric furnace to heat the electric furnace to a temperature required to be tested; testing the temperature of the back surface, exposed in the air, of the metal sheet by using a laser thermometer; the steps are repeated for multiple times, the difference value between the furnace temperature and the back temperature is recorded, and the average value is calculated and can serve as the judgment basis of the heat insulation performance of the thermal barrier coating. The method is simple and convenient to operate, accurate in test condition and high in practical application value.

The invention discloses a double-ceramic-layer thermal barrier coating of a differentiated columnar crystal structure and a preparation method, and belongs to the technical field of thermal barrier coating corrosion and protection. The invention innovatively discovers and utilizes the double influence of the columnar crystal size on the performance of the coating; the YSZ layer adopts a fine grain structure of 1-1.5 microns, so that the bonding strength and thermal shock resistance of the coating can be obviously improved; and the modified gadolinium zirconate layer adopts a 2-3 [mu] m coarse grain structure, so that the heat conductivity can be reduced, the permeation path of CMAS along a grain boundary can be effectively inhibited, and meanwhile, the modified gadolinium zirconate layer reacts with CMAS to form a compact barrier layer to prevent further permeation of CMAS. Through accurate regulation and control of electron beam physical vapor deposition (EB-PVD) process parameters, differential control of the sizes of the two layers of ceramic columnar crystals is realized, and under the synergistic effect of the two columnar crystal structures with different sizes, the thermal cycle life and CMAS corrosion resistance of the whole coating system in an ultra-high-temperature environment are remarkably prolonged and improved.

The invention relates to the technical field of thermal barrier coatings, in particular to a gadolinium oxide and aluminum oxide co-doped modified YSZ: Dy thermal barrier sensing coating material as well as a preparation method and application thereof. The invention provides a thermal barrier sensing coating material. The chemical composition of the thermal barrier sensing coating material is Y Gd Al < c > Zr < d > DeyOf, wherein a is equal to 0.01 to 0.04, b is equal to 0.15 to 0.35, c is equal to 0.40 to 0.60, d is equal to 0.35 to 0.70, e is equal to 0.01 to 0.02, and f is equal to 1.50 to 1.70. The temperature measurement upper limit of the thermal barrier sensing coating material is 1200 DEG C, and the average thermal expansion coefficient is increased by 18% at the room temperature of 1200 DEG C, so that the thermal shock resistance of the thermal barrier sensing coating is effectively improved, and the service life of the thermal barrier sensing coating is prolonged.

The application belongs to the field of turbine blade thermal barrier coating of an aero-engine. Specifically, it is a structure design, a preparation method and a prepared coating of a double-layer radiation-resistant thermal barrier coating with a high-reflection layer and a high-absorption layer. The coating comprises a high-absorption layer and a high-reflection layer. The high-absorption layer can absorb part of the energy of photon radiation and re-emit it into the environment, while relying on a cooling gas film to quickly remove heat. Part of the energy of the photon radiation is reflected by the high-reflection layer again to the high-absorption layer after passing through the high-absorption layer, and the process of absorption-emission-cooling gas film heat dissipation is repeated. Within a set temperature range, the absorption rate of the high-absorption layer is determined based on the temperature difference requirement between the inner and outer surfaces of the thermal barrier coating, and the high-absorption layer material is determined based on the absorption rate. The application greatly reduces the radiation heat flow penetrating the coating, avoids the direct heating of the high-temperature alloy by infrared radiation, and significantly improves the heat insulation capacity of the thermal barrier coating and the service life of the turbine blade.

The utility model discloses a thermal barrier coating material fixing device which comprises a fixing device body, a fixing frame is arranged at the top of the fixing device body, a fixing piece is fixedly installed at the end of the fixing frame, a fixing block covers the surface of the fixing piece, and meanwhile a first support is fixedly welded to the bottom of the fixing frame. Supporting columns are fixedly welded to the ends, away from the fixing frame, of the first supports. According to the thermal barrier coating material fixing device, the thermal barrier coating material covers the three groups of fixing pieces on the surface of the fixing frame, and the thermal barrier coating is adsorbed and fixed on the surface of the fixing frame through the three groups of fixing blocks, so that the thermal barrier coating cannot fall off from the surface of the fixing frame when being tested; the fixing device bodies can be combined together to test a plurality of groups of thermal barrier coating samples, and the plurality of groups of fixing device bodies can be tightly concentrated together, so that more space is saved, and centralized management is facilitated.

The application provides a heat insulation performance testing device for thermal barrier coating, which comprises a hollow cavity with a through mold loading groove, a cylindrical graphite mold placed in the mold loading groove, and a temperature rising device and a first temperature measuring device which are opposite to each other and face one end surface of the cylindrical graphite mold; wherein one end surface of the cylindrical graphite mold is sprayed with a thermal barrier coating to be measured, and the side surface of the cylindrical graphite mold is sprayed with a heat insulation coating. The heat insulation condition of the heat insulation performance testing device for thermal barrier coating is set by spraying the heat insulation coating on the side surface of the graphite mold, and the heat insulation condition is set ingeniously so that the device can meet the Fourier heat transfer law under one-dimensional condition as much as possible, unnecessary heat escape is avoided, the heat flow on the coating surface completely realizes conduction to the back of the substrate, and thus, the measurement error caused by neglecting is avoided, and the result is accurate and reliable.

The invention discloses a method for predicting surface erosion characteristics and temperature distribution of a thermal barrier coating based on numerical simulation. The method comprises the steps of establishing a grid model, establishing an erosion model considering dynamic physical property changes of the coating, establishing a thin-wall thermal resistance model supporting the dynamic thickness of the coating, setting a time amplification factor and the like. The characteristics that the porosity, Young modulus, Vickers hardness and other physical properties of the coating change along with the service time are considered. And in combination with a thin-wall thermal resistance model considering the dynamic thickness of the coating, the erosion characteristic of the coating surface and the temperature distribution condition of the coating surface at any moment in the future are quickly predicted and obtained. The method has the advantage of high simulation precision in coating erosion prediction. According to the method, the wall surface erosion characteristics and thermal barrier coating surface temperature distribution caused after erosion can be predicted, so that the service life conditions of different device surface coatings are effectively predicted, and reliable data support and guidance are provided for design of a thermal protection system and timely replacement of equipment.

The invention relates to a combustion system, an engine and a vehicle. The combustion system comprises an air inlet channel, an exhaust channel, an air inlet valve, an exhaust valve, a cylinder cover, a cylinder sleeve and a piston, a cylinder cover combustion chamber is arranged in the combustion system, and at least one of the inner surface of the cylinder cover combustion chamber, the surface, facing the interior of the combustion system, of the air inlet valve, the surface, facing the interior of the combustion system, of the exhaust valve and the top surface of the piston is provided with a thermal barrier coating.

The invention discloses a high-entropy ceramic thermal barrier coating and a preparation method thereof, and relates to the technical field of thermal barrier coating materials. The method comprises the following steps: mixing ZrO2, HfO2, Ta2O5 and various rare earth oxides, and carrying out high-energy wet ball milling, drying, solid solution sintering and crushing to prepare submicron high-entropy ceramic powder; mixing the modified powder with aluminum sol obtained by hydrolyzing aluminum isopropoxide, rare earth nitrate and the like, dispersing, drying and carrying out heat treatment to obtain modified powder coated with aluminum oxide nanoparticles on the surface; carrying out spray drying granulation to obtain spherical agglomerated powder; and finally, a DD6 single-crystal high-temperature alloy matrix is subjected to sand blasting and pre-oxidation treatment, agglomerated powder is deposited on the surface of the matrix through a plasma spraying vapor deposition technology, a columnar crystal coating is formed, and a finished product is obtained through vacuum annealing. The coating prepared through the method is uniform in structure and high in bonding strength, thermal shock resistance and high-temperature phase stability are remarkably improved, and the coating is suitable for surface protection of aero-engine hot end components.

A spark plug for a spark ignited reciprocating internal combustion engine includes a mounting portion and an ignition portion. One or more surfaces of the ignition portion are at least partially coated with a thermal barrier coating.

The application relates to a dual-phase high-entropy ceramic material for high-temperature thermal barrier coatings and a preparation method thereof, in particular to a dual-phase high-entropy ceramic (La 0.2 Nd 0.2 Gd 0.2 Y 0.2 Ho 0.2 )2Zr2O7 with low thermal conductivity and high thermal expansion coefficient, which is mainly used for thermal isolation, thermal barrier coatings and other applications in high-temperature environments. The application is prepared by adopting a solid-phase reaction sintering process through accurate design of the combination of rare earth elements, forms a stable dual-phase structure, effectively inhibits grain growth through grain boundary pinning, and thus maintains a nanoscale grain structure. Meanwhile, the material can efficiently block heat transfer at high temperatures through optimization of phase proportion, and the thermal expansion characteristics are matched with a metal base layer, effectively avoiding the falling risk caused by the difference in thermal expansion of the two, and thus greatly improving the service life and reliability of the material in a high-temperature environment. The high-entropy ceramic material of the application can be widely applied to fields with high demand for high-temperature thermal isolation in aerospace, aviation, automobile industry and the like, is especially suitable for thermal barrier coatings, high-temperature thermal insulation materials and other high-temperature thermal insulation applications, and has important engineering application value.

The utility model provides workpiece thermal barrier coating thickness detection equipment, which relates to the field of detection equipment, and comprises a base, the upper end of the base is provided with a group of parallel and opposite vertical plates, the upper side of the base and the inner sides of the vertical plates are provided with direction adjusting assemblies, the upper side of each direction adjusting assembly is provided with a clamping cylinder, and the opposite end of each clamping cylinder is connected with a clamping plate. A sliding rail is arranged on the upper side of the clamping plate, a manual sliding block is connected to the outer side of the sliding rail in a sliding mode, and a first detection device and a second detection device are installed on the outer side of the manual sliding block. The thermal barrier coating thickness measuring device solves the problems that an existing thermal barrier coating thickness measuring device is not convenient to automatically operate to achieve detection comprehensiveness, and the detection mode is single.

The present disclosure provides a ceramic material for a thermal barrier coating and a manufacturing method thereof. A chemical composition of the ceramic material is LaYbZrCeO7. The ceramic material is manufactured by doping LaO1.5, YbO1.5 and CeO2 into ZrO2. A mole ratio of LaO1.5, YbO1.5, CeO2 and ZrO2 is 1:1:1:1. The manufactured ceramic material is in a composite phase structure mainly including a pyrochlore phase and a fluorite phase. The ceramic material according to the present disclosure can effectively inhibit corrosion penetration of molten CMAS in a high temperature environment, which reduces or avoids ceramic cracking and peeling. This better maintains microstructural integrity of the ceramic surface, thereby extending service life of ceramics.

The invention provides a thermal barrier coating high temperature resistance CMAS sedimentability evaluation method and system, and the method comprises the steps: preparing CMAS simulation particles with uniform particle size distribution through a spray granulation technology; spraying the CMAS to the surface of a thermal barrier coating sample to be evaluated by using a thermal spraying technology, observing the deposition state of the CMAS on the surface of the sample through a scanning electron microscope, carrying out image analysis and statistics based on the deposition state, and calculating the area deposition rate of the CMAS; performing three-dimensional shape reconstruction on the CMAS simulation particle sediment on the surface of the sample through a laser confocal microscope, and calculating the volume deposition rate of the CMAS based on reconstruction data; and comparing the area and volume deposition rate of the thermal barrier coating to be evaluated with a reference thermal barrier coating serving as a benchmark, and quantitatively evaluating the high-temperature CMAS deposition resistance of the thermal barrier coating to be evaluated. According to the method, the deposition behavior of the high-temperature CMAS on the surface of the thermal barrier coating is evaluated and measured, and the anti-CMAS performance of the thermal barrier coating in a real service environment is evaluated more accurately.

The application discloses a high-entropy rare earth strontium aluminate thermal barrier coating material with high fracture toughness and a preparation method thereof, and belongs to the technical field of thermal barrier coatings. 0.2 Nd 0.2 Sm 0.2 Eu 0.2 Gd 0.2 )2SrAl2O7. The high-entropy rare earth strontium aluminate thermal barrier coating material is synthesized by a solid phase method. According to the high-entropy design of the rare earth strontium aluminate, five different rare earth elements are doped in the rare earth position, the dislocation resistance of the ceramic is increased by using the serious lattice distortion effect, and the mechanical properties are improved. Through nanoindentation test, the fracture toughness reaches 2.15MPa.m 0.5 , so that the high-entropy rare earth strontium aluminate thermal barrier coating can better prevent the growth and extension of cracks.

A silicone-acrylic adhesive is made from a combination of I) a first aqueous emulsion containing a soft acrylic polymer, II) a second aqueous emulsion containing a hard acrylic polymer, and III) an aqueous emulsion of a silicone resin. The silicone-acrylic binders can be used to prepare thermal insulation coating compositions that can be applied to metal (e.g., steel) substrates or primed substrates. A thermal barrier coating prepared by drying the thermal barrier coating composition provides corrosion resistance under thermal barrier to a metal or primed substrate.

The invention discloses a preparation method of a composite heat insulation baffle for a single crystal furnace. The preparation method comprises the following steps: preparing heat insulation slurry; carrying out compression molding on the heat insulation slurry to form a composite heat insulation baffle pre-blank, and carrying out heating foaming treatment on the composite heat insulation baffle pre-blank to obtain a composite heat insulation baffle pre-body; introducing the reinforcing phase into pores in the composite thermal baffle preform, and drying the composite thermal baffle preform; carrying out carbonization treatment and graphitization treatment on the dried composite heat insulation baffle plate preform; and coating a thermal barrier coating on the outer surface of the carbonized and graphitized composite thermal baffle preform to prepare the composite thermal baffle for the single crystal furnace. According to the composite heat insulation baffle, the low-density porous graphite matrix is used as a main material, the carbon fiber reinforced phase is used as an auxiliary material, the YSZ thermal barrier coating is coated outside the composite heat insulation baffle, the low heat conductivity coefficient and high mechanical stability are achieved by optimizing the pore structure and fiber distribution, and the erosion resistance, oxidation resistance and thermal shock resistance are improved through the surface coating.

The application discloses a rusted anti-rust reflective heat-insulating coating containing tung oil coated flaky zinc powder and belongs to the technical field of zinc powder modification. According to mass fractions, the rusted anti-rust reflective heat-insulating coating comprises the following components: 5-10 parts of natural tung oil, 60-65 parts of flaky zinc powder, 10-15 parts of aluminum silver paste, 1-2 parts of lubricant, 2-4 parts of adhesion promoter, 8-12 parts of high molecular epoxy resin water-based dispersion, 0.5-1 part of polymerization catalyst and 5-10 parts of cosolvent. The rusted anti-rust reflective heat-insulating coating containing tung oil coated flaky zinc powder can reduce the reaction between zinc powder and water in the water-based emulsion, improve the storage stability of the zinc powder, and make the zinc powder not lose the cathode protection and shielding protection due to the early reaction. The preparation method is simple, raw materials are easy to obtain, and the cost is low.

The invention relates to the field of data management, in particular to a BRM business rule automatic reasoning method based on a knowledge graph. Comprising the following steps: obtaining a resource description framework triple based on a heterogeneous time series data stream containing a blade CNC machining log and thermal barrier coating process parameters, loading the triple into a graph database, and constructing a manufacturing knowledge graph data model; extracting historical time sequence data, and initializing a completely undirected graph; based on the process mechanism model and condition independence test, determining a data dependence path, and outputting a directed acyclic graph; performing analysis through intervention calculation, and calculating an average causal effect value; forming a causal knowledge graph by taking the average causal effect value as an attribute and the data dependence path as a relationship; and querying thermal spraying parameter nodes with average causal effect values exceeding a threshold value in the causal knowledge graph, and converting the thermal spraying parameter nodes into storage strategy rules. According to the method, the causal knowledge graph is converted into the storage strategy rule, so that automatic and closed-loop management from data acquisition to rule optimization is realized.

The invention relates to the field of high-temperature thermal resistance coatings, in particular to a material selection and preparation process of a low-infrared-transmittance coating, and particularly relates to a preparation method of a high-scattering-rate high-temperature thermal resistance coating, a base material of the high-scattering-rate high-temperature thermal resistance coating is Gd2Zr2O7, and the high-scattering-rate high-temperature thermal resistance coating further comprises a second-phase material; firstly, a required second-phase material is screened on the basis of machine learning in combination with experiments and a first principle, then a PS-PVD gas phase-solid phase codeposition method is adopted, the high-scattering-rate high-temperature thermal resistance coating is prepared, according to the obtained coating, a high-refractive-index-low-refractive-index interface between GdFeO3 particles and Gd2Zr2O7 gas phase columnar crystals can effectively increase scattering of infrared radiation, and the heat resistance of the coating is improved. And the vapor phase and solid phase co-deposited columnar crystals have uniform thermal physical properties, so that excellent coating binding force and excellent anti-sintering performance are provided.