543 results about "Erosion resistance" patented technology

The present invention belongs to the field of resource utilization of building materials and solid waste, and relates to a red-mud-based cementing material based on efficient drying, component homogenization and activity improvement, and a preparation method therefor. The preparation method comprises: adding a filter aid to red mud to carry out sedimentation, then subjecting same to filter pressing until the water content is 14-16%, then drying the solid material, which has been subjected to filter pressing, until the water content is 4% or below, and finally grinding same to obtain the product. The filter aid comprises the following raw materials: 10-30 parts of polyaluminum chloride, 5-15 parts of polyaluminum sulfate, 1000-1200 parts of blast furnace slag or fly ash, 700-900 parts of steel slag, 400-600 parts of carbide slag or alkaline residues, and 300-400 parts of desulfurized gypsum or phosphogypsum or fluorgypsum. By means of the present invention, the dehydration efficiency of red mud can be improved, the red-mud-based cementing material can also be prepared in one step; the preparation process for the red-mud-based cementing material is simplified; and the prepared red-mud-based cementing material has the advantages of a high mechanical strength, high durability and erosion resistance.

The invention provides a concrete super-early-strength quick-hardening material, and relates to the field of building materials. The high-strength concrete comprises the following components in percentage by mass: 40%-50% of calcium aluminate, 30%-40% of gypsum, 8%-15% of high aluminum, 1%-3% of an additive, 3%-12% of an exciting agent and 1%-5% of an auxiliary material. According to the super-early-strength quick-hardening material provided by the invention, hour-level strength can be quickly and stably improved, and the strength increasing curve of each age is smooth and stable, so that the requirements of scenes such as road repair and tunnel construction on early strength can be met; it can be guaranteed that the 28-day compressive strength of the material breaks through 70 MPa, the later strength is kept stable, and the long-term safety of an engineering structure is guaranteed; the anti-seepage, anti-freezing and anti-erosion capabilities are realized in a complex environment, the service life of a project can be effectively prolonged, and the maintenance cost is reduced. In addition, the invention further provides a preparation method of the concrete super-early-strength and quick-hardening material, and the preparation method is used for preparing the super-early-strength and quick-hardening material provided by the invention.

According to the mullite castable preparation method based on comprehensive utilization of the secondary aluminum ash nonferrous smelting slag, components are regulated and controlled by controlling the molar ratio of Al2O3 to SiO2, so that porous light mullite stably falls into a mullite phase region, and generation of excessive corundum phases is avoided. PMMA microspheres, corn flour, carbonized rice husks and SiO2 coated calcium carbonate composite pore-forming agent systems are adopted, and a layered slurry formula, gradient slip casting and segmented sintering processes are combined, so that the porosity and strength distribution are accurately regulated and controlled, and low-temperature sintering and amorphous phase change control are realized. By optimizing the grading of the porous light mullite aggregate and adding the homologous fine powder, the bonding strength and compressive strength of the castable are improved. And finally, the surface of the castable is coated with a compact mullite coating, so that the porosity is reduced, and the erosion resistance, corrosion resistance and stripping resistance are remarkably improved. The obtained castable has the advantages of light weight, high temperature resistance, high strength, low cost and excellent thermal stability and erosion resistance.

According to the MoSi2 coating erosion rate prediction method based on the particle collision theory, a MoSi2 coating erosion rate prediction model is constructed based on the particle collision theory, and the dynamic damage process of a MoSi2 coating is simulated through a test measurement set obtained by carrying out a particle-containing high-temperature combustion gas flow erosion test. The mass loss of the MoSi2 coating formed under the erosion of the particle-containing high-temperature combustion gas flow is obtained, so that the prediction of the MoSi2 coating erosion rate prediction model is more accurate, and meanwhile, the limitation of a traditional erosion prediction model method on the characterization of a multi-factor coupling effect is broken through; in addition, the dynamic damage process of the MoSi2 coating is visualized by constructing a morphology graph prediction model, and a high-confidence-coefficient theoretical tool is provided for anti-erosion design of the MoSi2 coating.

The utility model relates to the technical field of inflatable hoses, in particular to a high-performance wear-resistant extremely-cold-resistant inflatable hose. The inflation hose comprises a metal corrugated pipe, the metal corrugated pipe is sleeved with a steel wire mesh sleeve, the steel wire mesh sleeve is sleeved with a long connecting pipe, the long connecting pipe is sleeved with a vulcanization layer, one end of the metal corrugated pipe is connected with a long inner cone connecting nozzle in an inserted mode, and the outer surface of the long inner cone connecting nozzle is sleeved with a nut in a threaded mode. And a long outer cone connecting nozzle is inserted into the other end of the steel wire mesh sleeve. The inflatable hose can meet the requirement of a dew point of-65 DEG C by adopting a metal corrugated pipe structure, can meet the requirements of 40MPa working pressure and 120MPa bursting pressure structure by adopting a steel wire mesh sleeve structure and adopting a high-pressure brazing form after double-layer weaving, and meanwhile, the vulcanization layer is arranged outside the long connecting pipe in a sleeving manner, so that the service life of the long connecting pipe is prolonged. Therefore, the inflatable hose has excellent oxidation resistance, ozone resistance and erosion resistance.

The invention relates to the field of water conservancy project dams, in particular to a construction method of a dam composite flexible diaphragm wall. 2, equipment is in place; thirdly, wall forming is conducted through a construction method, and the equal-thickness cement soil underground continuous wall is formed; fourthly, the anti-seepage core plate is inserted; the anti-seepage core plate is composed of a body, a plurality of bundles of optical fibers are distributed inside or on the outer surface of the anti-seepage core plate, and the optical fibers extend downwards in the length direction of the body and can monitor environmental changes of the body and the underground diaphragm wall around the body. A continuous and uniform dam composite flexible anti-seepage wall can be formed for a winding dike, the erosion resistance and disturbance resistance of the anti-seepage wall can be improved, the anti-seepage durability is improved, meanwhile, whether a seepage area exists in the continuous wall or not is monitored through the anti-seepage core plate, and early warning is provided for effectively taking precautionary measures in time.

The utility model relates to a continuous pipe, belongs to the technical field of oil and gas development, and particularly discloses a scratch-resistant and erosion-resistant flexible composite continuous pipe which comprises a central pipe, a transition layer, a reinforcing layer, a tensile layer and an outer protective layer which are sequentially arranged from inside to outside, and a wear-resistant and erosion-resistant epoxy resin inner coating is sprayed on the surface of an inner cavity of the central pipe. The outer protective layer is made of a scratch-resistant alloy steel material, so that the strength of the whole pipe is improved; the transition layer is made of nitrile rubber; the reinforcing layer and the tensile layer are formed by weaving composite material belts reinforced by special fiber belts, and a signal cable and a power cable are fixedly arranged in the reinforcing layer and the tensile layer respectively. The composite material continuous pipe can obviously improve the scratch resistance and the fluid erosion resistance of the inner wall, is beneficial to saving materials, improves the utilization rate of the existing composite material continuous pipe material, and is suitable for various oil and gas exploitation.

The invention discloses a concrete mortar material mix proportion optimization method and system, and belongs to the technical field of concrete mortar. The invention discloses a concrete mortar material mix proportion optimization method. The method comprises the following steps: S1, establishing an initial mix proportion model; s2, obtaining an initial concrete mortar material mix proportion scheme; s3, constructing a concrete mortar material mix proportion optimization model; and S4, obtaining the mixing proportion of the concrete mortar material. The problem that the proportioning ratio of concrete mortar materials cannot be optimized in the prior art is solved, the use amount of a cementing material can be reduced, the cost is further saved, the compression resistance and the tensile strength are enhanced, the permeability and the carbonation are reduced, the freeze-thaw resistance and the erosion resistance are improved, the service life is prolonged, the slump, the fluidity and the plasticity can be improved, and the concrete mortar is suitable for large-scale production. The preparation method is simple, economic loss is reduced, the material mixing ratio can be optimized according to carbon emission, carbon dioxide generated in the concrete mortar production process is reduced, and the environmental protection effect is improved.

The invention provides a solid waste-based cementing material and a preparation method thereof, and relates to the technical field of solid waste resource utilization and cementing material preparation. The cementing material is prepared by mixing and grinding 60-80 parts by weight of modified phosphogypsum and 20-40 parts by weight of an auxiliary material, and the auxiliary material comprises at least one of steel slag powder, fly ash, lithium slag and mineral slag; a preparation method of the modified ardealite comprises the following steps: carrying out microwave treatment on ardealite for 0.5-1 hour, mixing the treated ardealite with aluminum oxide, attapulgite and sodium lignosulphonate, adding a tetramethylammonium hydroxide solution, and drying to obtain the modified ardealite. According to the solid waste-based cementing material disclosed by the invention, the phosphogypsum is modified, so that the solid waste-based cementing material has the characteristics of high strength, stable cementing, strong erosion resistance and the like while the mixing amount of the phosphogypsum is increased.

The invention provides a hot-state repairing material and a preparation method thereof, and belongs to the technical field of refractory materials. The hot-state repairing material provided by the invention is prepared from the following raw materials in percentage by mass: 87 to 98 percent of waste bricks, 0.5 to 4.5 percent of magnesium mineral micro powder, 0.5 to 5.0 percent of slag powder, 0.5 to 2.0 percent of dispersing agent, 0.2 to 1.5 percent of organic fiber and 0.1 to 0.5 percent of binding agent. According to the invention, waste bricks are used as aggregates, contain tiny pores, provide channels for reaction gas for heating the hot-state repairing material, and can be rapidly sintered with a furnace lining; the slag powder can be matched with the binder to improve the thermal adhesion rate of the thermal repairing material; the magnesium mineral micro powder can improve the reaction activity, and the dispersing agent assists the combination effect of the slag powder, so that the repairing material can be sintered through rapid reaction, and the compression strength and the erosion resistance are improved; and the organic fibers can form good filling among particles and fine powder, so that the compression strength and the erosion resistance are improved.

The invention relates to the technical field of construction material testing, and provides a tunnel construction material waterproof performance testing device which comprises a freezing and thawing test box, a machine box and a rack, a pressurized water injection system and a sealing slotting mechanism are arranged in the rack side by side, and the pressurized water injection system comprises a jack and a water pressure system; the jack is used for detecting the bearing load strength of the material test block, and the water pressure system is used for pressurizing water and detecting the waterproof performance of the material test block under high load. The tunnel construction material waterproof performance testing device integrates pressure resistance, erosion resistance, freezing resistance and waterproof performance detection tests on construction materials, can simulate the overall state of the construction materials in different tunnel environments to perform waterproof performance tests, so that the construction materials are added according to different tunnel requirements to improve the waterproof performance, and meanwhile, through the arrangement of the sealing slotting mechanism, the waterproof performance of the tunnel construction material is improved. The contact surface of the material test block and the water pressure system can be subjected to sealing waterproof treatment, and water is prevented from overflowing from the contact surface during water seepage detection.

The invention discloses sulfate-erosion-resistant metakaolin-slag-based geopolymer concrete, belongs to the technical field of concrete, and aims to solve the problems that the corrosion resistance of traditional silicate concrete is ineffective and the adaptability of conventional alkali-activated concrete is insufficient in a special environment. The concrete comprises the following components in parts by weight: 60-90 parts of a cementing material, 120-170 parts of aggregate, 15-30 parts of a composite activator, 2-8 parts of a function regulator and the like, the cementing material is prepared from nano TiO2 / KH-550 composite modified metakaolin, slag and silica fume-coal gangue powder-HAP composite powder; the aggregate comprises modified limestone macadam (soaked and dried by a sodium dihydrogen phosphate solution) and river sand; the composite exciting agent comprises water glass, sodium hydroxide, sodium pyrophosphate, propylene glycol and the like; the function regulator comprises superfine fly ash, a naphthalene water reducer, HPMC (Hydroxy Propyl Methyl Cellulose) and boric acid. Through the synergistic effect of the components, the sulfate corrosion resistance, the mechanical property and the environmental adaptation performance of the concrete are improved, and the concrete is suitable for engineering construction under the service environment of high-concentration sulfate and the like.

The invention belongs to the technical field of jet-type hydraulic down-the-hole hammer drilling tools, and relates to an involution type jet-flow element which is formed by involution of a jet-flow element plate A and a jet-flow element plate B. The jet-flow element plate A and the jet-flow element plate B are of a mirror symmetry structure. And an input channel, a left signal channel, a left control channel, an upper cavity emptying channel, a right control channel, a right signal channel, an output channel, a lower cavity emptying channel, a main nozzle, a split wedge fixing screw hole, an involution plate fixing pin hole A and an involution plate fixing pin hole B. According to the invention, the processing difficulty is reduced, the processing period is shortened, the processing cost is reduced, and the production efficiency is improved. According to the flow channel with the small depth-to-width ratio, the stress of a stress concentration area is reduced, the jet element is promoted to adopt a hard alloy with a lower mark and higher erosion resistance, then the erosion resistance of the jet element is improved, the service life of the jet element is prolonged, the small-depth-to-width-ratio oppositely-combined jet element provides possibility for design and machining of the jet element with the ultra-large width-to-depth ratio, and the design cost is reduced. And enough strength redundancy is provided.

The invention discloses a clay stabilizer for a high-temperature environment and a preparation method of the clay stabilizer, and belongs to the technical field of oil field oil extraction auxiliaries. The preparation method comprises the following steps: mixing and stirring quaternary ammonium salt modified silicon dioxide and modified acrylamide according to a mass part ratio of 1: (5-6) to obtain the clay stabilizer. The clay stabilizer is obtained by mixing quaternary ammonium salt modified silicon dioxide and modified acrylamide, so that not only is the anti-swelling performance improved, but also the scouring resistance is improved.

The invention discloses a method for detecting softening resistance, chlorine salt erosion resistance and frost heaving resistance of aggregate, and relates to the field of performance detection of aggregate for pavement engineering, and the method comprises the following steps: obtaining image information of the preprocessed aggregate, carrying out partition processing on the image information by using an image partition processing technology, and obtaining a classification result of the aggregate according to a processing result; carrying out interval sampling on the aggregate based on the classification result, and carrying out identification analysis on the aggregate in combination with a directional tracking algorithm to obtain a grading result of the aggregate; carrying out softening resistance, chlorine salt erosion resistance and frost heaving performance tests on the aggregate, and summarizing the relationship between the aggregate color and the mass loss to obtain the mass loss result of the aggregate; and performing product performance fitting operation on the aggregate to evaluate the aggregate use performance satisfaction degree under the condition of a corresponding quality loss result so as to optimize the aggregate pretreatment process. According to the invention, softening resistance, chlorine salt erosion resistance and frost heaving performance tests are carried out on the aggregate to obtain the mass loss result of the aggregate, and the quality problem can be identified in advance.

The invention discloses a soil erosion resistance prediction method and system based on earth surface parameters, and relates to the technical field of soil erosion and water and soil conservation monitoring and prediction, and the method comprises the steps of earth surface parameter collection, parameter preprocessing, erosion response modeling, erosion resistance threshold tensor inversion and erosion resistance prediction. Collecting multi-source earth surface parameter data; secondly, constructing a unified earth surface parameter feature set; obtaining erosion response simulation data by adopting an erosion response modeling method combining physical process simulation and lightweight machine learning residual correction; an explicit Bayesian neural network and a variational reasoning framework are constructed, observation data are combined, and a four-dimensional anti-corrosion threshold tensor is obtained through inversion; introducing a double-branch space-time multi-task fusion prediction model of an anti-erosion threshold tensor, and outputting a prediction value and a prediction grade of the soil anti-erosion capability; according to the scheme, dynamic and spatial prediction of the erosion resistance of the soil can be realized, and a scientific basis is provided for water and soil conservation and ecological environment management.

The invention discloses a preparation method of nano sepiolite fibers, which comprises the following steps: acidizing sepiolite by a hydrothermal synthesis method to enable the interior of the sepiolite to have mutually communicated holes, and loading SiO2 particles on the surface of the sepiolite to prepare the nano sepiolite fibers; the sepiolite is modified, the specific surface area of the sepiolite is increased, the sepiolite is used for the steel structure water-based acrylic acid anti-corrosion coating in the inland wharf environment, good compatibility with water-based acrylic acid emulsion is achieved, and the tensile strength and the erosion resistance of the coating can be improved.

The invention relates to the technical field of building repairing materials, and particularly discloses an anti-impact and wear-resistant repairing material and a preparation method thereof.By optimizing the content of all the components of the raw materials, the prepared repairing material has excellent anti-erosion performance and wear-resistant performance, Portland cement serves as a main cementing material, and the anti-impact and wear-resistant performance of the repairing material is improved; basic strength and cohesiveness are provided; fly ash and silicon powder synergistically enhance compactness and durability; quartz sand is used as wear-resistant aggregate, so that the compression resistance and the wear resistance are improved; the toughness and the impact resistance are enhanced by the composite modified carbon fibers; the redispersible latex powder improves the flexibility and the binding power; the polycarboxylate superplasticizer optimizes the flowability and improves the compactness; and the defoaming agent reduces pore defects and ensures material uniformity. The repair material provided by the invention is suitable for repair engineering needing to bear mechanical shock or wear environment, and has good construction performance.

The invention discloses an impact corrosion and wear resistance test device and a use method, and relates to the technical field of test equipment. The impact corrosion and wear resistance test device comprises a test tank body, a corrosion assembly, a wear assembly and an impact assembly, wherein the test tank body is provided with an accommodating space; the corrosion assembly comprises a discharge part, and the discharge part is arranged in the test tank body and is used for injecting a corrosion medium into the accommodating space; the abrasion assembly comprises a friction piece and a first driving piece, the friction piece is arranged in the containing space and makes contact with the sample, and the first driving piece drives the friction piece to move relative to the sample; the impact assembly comprises an impact hammer and a second driving piece, and the second driving piece drives the impact hammer to intermittently impact the friction piece, so that impact pressure is transmitted to the sample through the friction piece. According to the impact corrosion and wear resistance testing device, three working conditions of corrosion, impact and wear are coupled to act on the sample, and the accuracy and reliability of part performance evaluation are improved.

The invention relates to the field of high-temperature refractory materials, and discloses a fusion casting method for improving the performance of an AZS octagonal cylinder checker brick, which comprises the following steps: mixing and smelting main raw materials and a composite additive (containing surface-modified nano YAG particles and a rare earth core-shell structure) to obtain a high-purity melt in an inert atmosphere; staged vibration pouring is conducted in the vacuum environment, low-frequency vibration and high-frequency vibration are combined, and the melt filling compactness is improved; an alternating magnetic field is coupled in the gradient cooling process, grain growth is directionally regulated and controlled, and thermal stress is released; and annealing treatment is combined with a surface densified coating, so that the defects are further eliminated, and the erosion resistance is enhanced. According to the invention, through linkage of technologies such as strengthening of a crystal boundary by the composite additive, collaborative optimization of a structure by vibration-magnetic field, inhibition of phase change by a gradient process and the like, the material has excellent thermal shock resistance, high-temperature strength and molten medium corrosion resistance, and is suitable for harsh working conditions such as glass kilns and metallurgical high-temperature equipment.

The invention relates to a low-sodium low-silicon fused zirconia corundum brick and a preparation method thereof, and relates to the technical field of refractory materials. The low-sodium low-silicon electric smelting zirconium corundum brick is prepared from the following raw material oxides in percentage by weight: 30 to 45 percent of ZrO2, 9.0 to 12 percent of SiO2, 0.1 to 1.0 percent of Cr2O3, 0.9 to 1.6 percent of Na2O + K2O + CaO, 0.3 to 2.0 percent of mixed rare earth oxide and the balance of Al2O3 and inevitable impurities. By introducing a proper amount of Cr2O3 and mixed rare earth oxide and controlling the composition of a glass phase, the number of baddeleyite-corundum eutectic and the viscosity of the glass phase are improved, the erosion resistance and resistivity of the zirconia corundum brick are further improved, the safe service life of a glass kiln is prolonged, meanwhile, the performance of a glass product is also improved, and the application prospect is wide. And defects on the glass surface are reduced.

The invention relates to prestressed pipe pile coarse aggregate ultra-high performance concrete and a preparation method thereof, in the prestressed pipe pile coarse aggregate ultra-high performance concrete, each cubic meter of concrete comprises the following components: 380 to 600 kg of cement, 50 to 150 kg of silica fume, 30 to 100 kg of microbeads, 500 to 800 kg of sand, 900 to 1200 kg of modified coarse aggregate, 8 to 25 kg of a water reducing agent, 0.8 to 2.0 kg of a defoaming agent, 100 to 170 kg of water and 40 to 240 kg of steel fiber; the modified coarse aggregate comprises gravels coated with a graphene film. The surface of the modified coarse aggregate is coated with a layer of graphene, the interface transition area of the aggregate and cement mortar can be improved, the compressive strength and erosion resistance of concrete can be improved, the durability of the tubular pile can be improved, the service life of the tubular pile structure can be prolonged, and the maintenance cost can be reduced.

The invention belongs to the technical field of functional coatings and composite materials thereof, and particularly relates to a low-infrared-emissivity coating based on aluminum powder pretreatment and a preparation method of the low-infrared-emissivity coating. Nanometer CeO2 with a porous structure and Al powder are calcined to form an interface heterojunction under the combined action of nanoparticles and nanowires, and then the interface heterojunction is used as a filler to be prepared into a low-infrared-emissivity coating with fluorocarbon resin and an auxiliary agent; after pretreatment, the aluminum powder with the interface heterojunction structure can greatly promote electron migration, so that the conductivity is improved by 2 orders of magnitude compared with that of a traditional metal oxide; and according to the Hagen-Rubens law, the conductivity is in negative correlation with the emissivity, so that the emissivity is reduced. The infrared emissivity of the final coating at the wave band of 8-14 microns is as low as 0.16, the coating has high stability, light weight, high temperature resistance and environmental erosion resistance, the preparation process is simple, the coating is suitable for the fields of aerospace thermal management, military stealth and industrial energy saving, and an innovation direction is provided for the next generation of infrared stealth coatings.

The present invention relates to the technical field of building materials, and discloses a seawater-resistant calcium ferrite cement concrete and a preparation method thereof, which are obtained by using bis[3-(trimethoxysilyl)propyl]amine, perfluorohexylethylene, and 3-bromopropene as raw materials, through addition and quaternization reactions, polymerizing with acrylic monomers, and then compounding with calcium ferrite cement, composite steel slag powder, and modified basalt fibers, etc.; the fluorinated quaternary ammonium salt siloxane modifier has relatively rich siloxane bond functional groups on the surface of the siloxane, which can undergo a condensation reaction with the silanol groups on the surface of the concrete substrate after hydrolysis, effectively filling the pores and cracks in the concrete material; the composite steel slag powder admixture has fine particles, which can make the system structure filled more tightly and improve the ability to hinder the penetration and diffusion of Cl ‑ ions; the modified basalt fibers improve the dispersion stability in the matrix and further improve the seawater erosion resistance of the concrete.

The invention discloses fluid-state solidified soil prepared from engineering residue soil and a preparation method thereof, belongs to the technical field of building materials, and aims to effectively improve the impermeability, strength and flowability of the fluid-state solidified soil and solve the problems of poor seawater erosion resistance, poor flowability, weak stability and the like of the fluid-state solidified soil in a marine environment in the prior art. A large amount of wastes such as the engineering residue soil, the fly ash and the slag powder are used, dependence on natural resources is reduced, and meanwhile, the environmental protection problem of the wastes is effectively solved. And industrial waste is converted into useful building materials, so that the recycling of resources is promoted, and the concept of sustainable development is met.

A diameter-reducing speed-increasing type drilling tool check valve erosion resistance simulation detection test bed belongs to the field of drilling tool check valve erosion resistance detection, and comprises a mortar box, a circulating pipeline, a mortar pump, a motor, a stirrer and a drainage sleeve, and further comprises a check valve loading vehicle, the upper end face of the mortar box is a detection working platform provided with a backflow window and a stirrer, a flow guide hole is formed in the bottom of the mortar box, the drainage end of the circulating pipeline is connected and communicated with the flow guide hole, the erosion end of the circulating pipeline is arranged on the upper portion of the backflow window, and a mortar pump driven by a motor is connected in the circulating pipeline. The circulating pipeline is a variable-diameter pipeline with the diameter gradually reduced from the flow guide end to the erosion end, gradient reduction of the flux of the circulating pipeline can assist the mortar pump to regulate and control the flowing speed of liquid mortar, the reliability of liquid mortar flow speed control and the stability of liquid flow flowing are improved, the liquid flow speed increasing efficiency is improved, the operation power is reduced, and the operation cost is reduced. The working efficiency is improved, the operation efficiency can be further improved, and the labor intensity is reduced.

The invention discloses sand dust erosion test equipment and method, and the sand dust erosion test equipment disclosed by the invention is characterized in that an erosion unit and a sand conveying unit are integrated through an equipment main body; a test sample is fixed and heated through a test bed of the erosion unit, so that the test sample can be at a working condition temperature, and a sand and dust erosion test is stably carried out; a spray gun of the erosion unit can spray the heated mixed high-speed airflow and the sand dust particles to a test sample, so that the sand dust erosion test process meets the temperature of sand dust erosion of an engine in aviation operation. Therefore, the sand and dust erosion test is closer to the working condition environment of the aero-engine, and the sand and dust erosion test can more accurately reflect the influence of sand and dust erosion on the aero-engine, so that the erosion resistance of the material of the aero-engine is obtained, and a reference basis is provided for the design of the aero-engine.

The invention discloses a capacitor aluminum alloy shell protective coating and a preparation method thereof, and belongs to the technical field of coating preparation. The modified epoxy resin is prepared by modifying the epoxy resin through two compounded ultraviolet absorbents, the ultraviolet absorbents are chemically bonded with the epoxy resin, migration resistance is achieved, the anti-ultraviolet and anti-aging performance of a coating is remarkably improved, degradation of the resin is delayed, and the ultraviolet absorbents and the organic silicon modified FEVE tetrafluoro resin have a synergistic effect, so that the anti-ultraviolet and anti-aging performance of the coating is improved, and the anti-ultraviolet and anti-aging performance of the coating is improved. According to the present invention, the coating has characteristics of high weather resistance, high chemical stability and further environmental erosion resistance, the antioxidant modifies the alkyd resin, the chemical bonding effect provides the significant oxidation resistance, the added nanometer anti-rust agent fills the coating microdefects, and the coating defects can be significantly reduced under the interaction with the leveling agent, the defoaming agent and the dispersant, such that the coating quality can be improved; and the service life of the capacitor shell in the outdoor or strong light environment can be prolonged comprehensively.

The invention provides a method for repairing a loose ruins body through crack grouting and bundling and pulling, and belongs to the field of earthen ruins protection. According to the method, the loose ruin body is reinforced in the mode of combining crack grouting and bundling and pulling, the reinforced fiber composite material is adopted for bundling and pulling, the integrity and stability of the loose ruin body can be enhanced, structural cracks of the loose ruin body can be filled in combination with crack grouting, and deformation or movement under the action of external force is prevented; after being dried and cured, the reinforced fiber composite material is high in strength and hardness, can effectively prevent the ruin body from continuing to crack, and has good tensile strength, scouring resistance and wind erosion resistance; compared with a traditional reinforcing method, the method has the advantages that intervention on the ruin body is small, original historical styles and cultural information of the ruin body can be reserved to the maximum extent, and protection and display of the ruin body are facilitated; the structure stability and the anti-seismic property of the reinforced ruin body are remarkably improved, the frequency and the cost of later maintenance and repair are reduced, and the economic burden of cultural relic protection is reduced.

The invention belongs to the field of materials, and particularly discloses a high-toughness wear-resistant material and a preparation method and application thereof.The high-toughness wear-resistant material is prepared from 50 wt%-70 wt% of corundum, 20 wt%-40 wt% of mullite, 5 wt%-10 wt% of nanometer silicon carbide micro powder, 3 wt%-5 wt% of zirconium oxide, 2 wt%-5 wt% of nanometer titanium carbide micro powder, 1 wt%-3 wt% of rare earth oxide and 1 wt%-3 wt% of silicon oxide micro powder; the high-temperature strength and the thermal shock resistance are both considered through corundum-mullite combination, the wear resistance and the anti-scouring performance of the material are remarkably improved through introduction of the nano silicon carbide micro powder and the nano titanium carbide micro powder, the overall toughness of the material is improved through zirconium oxide, the material is made to adapt to mechanical shock at the high temperature, and the service life of the material is prolonged. Through the synergistic effect of the rare earth oxide and the silicon oxide micro powder, a stable protective film is formed at a high temperature, and the acid gas erosion resistance of the material is remarkably improved.