252 results about "Pyrolytic carbon" patented technology

A composite, comprising a binder, the binder comprising one or more of polymeric, metallic, or ceramic, or pyrolytic carbon binder and a nanostructured carbon having a cellular structure. The cellular structure comprises one or more cell walls having a structure formed by a template and one or more cavities. Each cavity is substantially enclosed by the one or more cell walls and substantially unimpregnated by a liquid or solid.

The invention relates to a preparation method of a ceramic-based composite material, in particular to a preparation method of a ceramic-based composite material with a pyrolytic carbon-carbon nanotube interface, which is used for solving the problem that in the aspect of improving the thermal conductivity of an interface layer, metals such as Fe, Co, Ni and the like are widely used as catalysts for growing carbon nanotubes at present, so that the thermal conductivity of the interface layer is improved. Carbon nanotubes obtained through a traditional preparation method are prone to agglomeration and uneven in distribution, the risk of the preparation process is high, the carbon nanotubes are not suitable for large-scale production, although metal particles can be reduced through a chemical plating method, the particle sizes of the metal particles are not controlled, the distribution of the metal particles is uneven, and the requirement of a chemical vapor reduction method for distribution of an earlier-stage metal salt solution is high. And the defect is difficult to realize easily. According to the preparation method of the ceramic-based composite material with the pyrolytic carbon-carbon nanotube interface, the ceramic-based composite material with the pyrolytic carbon-carbon nanotube interface is finally obtained through pretreatment, solution A preparation, metal salt solution in-situ reduction and chemical vapor deposition in sequence.

The invention discloses a ceramic component gradient modified C / C-SiC-ZrC composite material and a preparation method thereof, and belongs to the technical field of carbon / carbon composite material matrix modification preparation, a carbon fiber preform and a heating element are placed in chemical liquid phase vaporization deposition equipment, a precursor solution is added until the carbon fiber preform is fully soaked, and a ceramic component gradient modified C / C-SiC-ZrC composite material is obtained; and carrying out chemical liquid phase vaporization deposition reaction to obtain the low-density C / C composite material with porosity in unidirectional gradient distribution. And putting the mixture into a graphite crucible with a carbon-rich area facing downwards and a carbon-less area facing upwards, completely putting the graphite crucible into the ceramic powder for modification, reacting and infiltrating, and cooling to room temperature to obtain the C / C-SiC-ZrC composite material with the gradient modified ceramic components. The end with high ceramic content endows the material with a high-temperature thermal protection function, the end with high pyrolytic carbon content can effectively conduct heat generated in a ceramic-rich area, and the end with low ceramic content can effectively conduct heat generated in a ceramic-rich area. Due to the gradient design from the ceramic-rich area to the carbon-rich area, the material has high-temperature oxidation resistance and ablation resistance and is light, and lightweight design of an aerospace thermal protection structure is facilitated.

The invention provides a high-strength winding thin-wall SiC composite cladding tube and a preparation method thereof. A preparation method of a high-strength winding thin-wall SiC composite cladding tube comprises the steps that silicon carbide fibers are wound and laid around a core mold, the winding pre-tightening force is smaller than or equal to 10 N. The winding mode comprises the first mode that one layer of annular winding is conducted firstly, then one layer of spiral winding is conducted, and the number of fiber intersection points in the whole annular direction at a certain position of the outer surface of the core mold is 1. One-layer annular winding is carried out firstly, then two-layer spiral winding is carried out, the number of fiber intersection points in the whole annular direction at a certain position of the outer surface of the core mold is 3, and a prefabricated body is obtained; carrying out a densification deposition process on the preform, wherein the densification deposition process comprises PyC pyrolytic carbon interface deposition, CVI chemical vapor infiltration and CVD chemical vapor deposition; and precise inner circle and outer circle machining is conducted, and the SiC composite cladding pipe is obtained. According to the preparation method disclosed by the invention, through a specific dry winding mode and a densification deposition process, the SiC composite material tube blank is higher in density and better in mechanical property.

The invention relates to a high-performance hafnium-based ultrahigh-temperature ceramic-based composite material and a preparation method thereof. The method comprises the following steps: depositing pyrolytic carbon on the carbon fiber surface of a carbon fiber preform through a CVD (Chemical Vapor Deposition) method; preparing a hafnium oxide interface layer on the surface of the pyrolytic carbon through an atomic layer deposition method, and performing ultra-fast annealing treatment to form a pyrolytic carbon-hafnium oxide composite interface layer; carrying out a reaction with a matrix containing a pyrolytic carbon-hafnium oxide composite interface layer through an impregnation pyrolysis method; a hafnium carbide coating is prepared on the surface of the composite material matrix through a CVD method; and preparing a hafnium oxide coating on the surface of the hafnium carbide coating through an atomic layer deposition method, and carrying out ultra-fast annealing treatment to prepare the high-performance hafnium-based ultra-high-temperature ceramic-based composite material. According to the preparation method, the pyrolytic carbon-hafnium oxide composite interface layer is prepared by adopting an atomic layer deposition process and depending on ultra-fast annealing treatment, and meanwhile, the hafnium carbide-hafnium oxide composite coating is prepared, so that the mechanical property of the composite material in a high-temperature aerobic environment is remarkably improved.

The invention discloses a method for preparing a C / C-SiC composite material through multi-stage recovery of carbon / carbon composite material processing waste, and belongs to the technical field of C / C composite material preparation. The method comprises the following steps: carrying out multi-stage screening treatment on the carbon / carbon composite material processing waste, and screening and separating short carbon fibers and pyrolytic carbon powder; mixing the screened short carbon fibers and pyrolytic carbon powder with phenolic resin, industrial silicon powder and SiC powder, and preparing a fiber reinforced resin block in a mold pressing manner; and carrying out one-step continuous carbonization and ceramic heat treatment on the fiber reinforced resin block to finally obtain the C / C-SiC composite material. According to the method, high-added-value recycling of the C / C processing waste is achieved, the process is simple, the cost is low, operation is convenient and fast, the problems of resource waste and environmental pollution caused by existing waste treatment are solved, and the prepared C / C-SiC composite material is excellent in performance and can be widely applied to the fields of aerospace, high-end manufacturing and the like.

The application discloses a preparation method of a carbon molecular sieve adsorbent for methane-nitrogen separation. The method comprises the following steps: 1) grinding graphite powder and placing the same in a metal salt solution, drying after sufficient stirring to obtain modified graphite; 2) placing phenolic resin powder in a metal salt solution, drying after sufficient stirring to obtain modified resin; 3) mixing the modified graphite and the modified resin, adding tar into the mixture, kneading and then extruding into a strip shape; 4) sufficiently drying the formed material, then transferring the material into a gas atmosphere calcination furnace, and calcining the material under an inert gas atmosphere for a certain time; and 5) performing programmed temperature heating on the obtained material under an inert gas atmosphere, introducing a carbon source, and depositing pyrolytic carbon on the surface of the material by a gas phase deposition method to obtain a carbon molecular sieve adsorption material. The carbon molecular sieve material is used as an adsorbent by adopting a pressure swing adsorption technology, has high adsorption capacity for nitrogen and high methane-nitrogen selectivity in methane-nitrogen separation application, and has a good industrial application prospect.

According to the catalyst for generating ethylene through electrocatalytic reduction of carbon dioxide, a CuO / SrCO3 heterojunction is synthesized through high-temperature liquid-phase pyrolysis and carbonization, an energy barrier of a reaction intermediate can be optimized through the electron effect of a heterojunction interface carried by the catalyst, efficient adsorption of OCHCHgroups of the reaction intermediate is achieved, and the catalytic activity of ethylene is improved. Further proton coupling of the intermediate is promoted, and finally, a target reduction product C2H4 is efficiently generated; meanwhile, the stability of the structure is guaranteed by a stable heterojunction surface of the heterojunction, so that the heterojunction has excellent durability.

The invention relates to a uniform carbon-coated mesoporous silicon carbon negative electrode material and a preparation method and application thereof.The preparation method comprises the steps that a product obtained after pyrolysis and carbonization of a biomass carbon source is subjected to alkali activation treatment, acid pickling, drying, smashing, passivation, water washing and drying are conducted to obtain a mesoporous carbon matrix, nanometer silicon particles are deposited in pores of the mesoporous carbon matrix, and the uniform carbon-coated mesoporous silicon carbon negative electrode material is obtained. Then selecting a low-temperature carbonization material and polyethylene glycol to perform pre-carbonization and complete carbonization treatment on the mesoporous silicon carbon material to obtain a carbon coating layer, and finally obtaining the uniform carbon-coated mesoporous silicon carbon negative electrode material. When the uniform carbon-coated mesoporous silicon carbon negative electrode material is applied to a lithium battery, the mesoporous skeleton can effectively inhibit volume expansion of silicon in a battery circulation process, and the uniform carbon-coated layer can effectively reduce the risk of direct contact between the negative electrode material and an electrolyte, so that a stable SE I film is formed to reduce the occurrence of side reactions; and the first coulombic efficiency and the cycle performance of the battery are further improved.

The application discloses a kind of high thermal conductivity unidirectional carbon / carbon composite material and preparation method thereof, carbon fiber bundle is spread, carbon fiber bundle is flat, and flat carbon fiber bundle is obtained;Flat carbon fiber bundle is arranged in parallel, and weaving is carried out, and carbon fiber cloth is obtained;Pyrolytic carbon is deposited to carbon fiber cloth;The carbon fiber cloth of pyrolytic carbon deposition is pre-graphitized;Pre-graphitized carbon fiber cloth of preset layer number is laminated, and preform is obtained;Flat carbon fiber bundle is arranged in imitation bricklaying structure;Preform is clamped along the thickness direction, and pyrolytic carbon is deposited to preform densification, then graphitization treatment is carried out, and high thermal conductivity unidirectional carbon / carbon composite material is obtained.The structure and arrangement mode of fiber bundle and unidirectional fiber cloth are controlled and designed, cross-scale structure design on micro-mesoscopic-macro scale is realized, and unidirectional C / C composite material with high thermal conductivity, high bearing and ultra-light is obtained.

The invention relates to a process for treating carbon black, which process comprises gasification of a carbon black-containing feedstock at a temperature of from 730°C to 950°C. The carbon black-containing feedstock is typically pyrolytic carbon black, such as recycled carbon black. It is believed that the resulting treated carbon black has a lower coke content and, as a result, the resulting rubber articles have improved properties.

The application discloses a multi-component carbon fiber reinforced composite material and a low-temperature infiltration preparation method. The reaction infiltration technology is adopted, a low-melting-point infiltrant is used as a carrier, a high-melting-point component is introduced into the C / C composite material at low temperature, different components are enriched in different regions according to the reaction rate difference of each component and pyrolytic carbon, the internal content of the low-melting-point phase is reduced, and the ablation resistance is improved.

The invention discloses a method and a system for recycling a carbon fiber composite material through step-by-step thermal cracking based on a nitrogen atmosphere, the nitrogen atmosphere is adopted to replace a high-vacuum system, so that the equipment investment and maintenance cost are greatly reduced, meanwhile, the explosion risk caused by air back-suction is effectively prevented through positive pressure protection, and the method and the system are more suitable for industrial amplification; through a two-step method strategy of taking oil at a low-temperature section and removing residues at a high-temperature section, the cracking process is refined, macromolecular oil products are quickly removed under nitrogen carrying by first-stage low-temperature cracking, secondary cracking is effectively inhibited, and first-stage cracked oil which is simpler in component, higher in quality and easy to refine is obtained; long-time high-temperature exposure of the fibers is avoided through step-by-step cracking, decomposition products can be taken away in time through nitrogen flow, deposition of pyrolytic carbon on the surfaces of the fibers is reduced, the fibers with the clean surfaces can be obtained through follow-up short-time oxidation, and the retention rate of the tensile strength of the fibers can reach 90% or above.

The invention belongs to the technical field of thermal structure materials, and particularly discloses a high-temperature-oxidation-resistant carbon fiber reinforced boron nitride-based composite material and a preparation method thereof. According to the carbon fiber reinforced boron nitride-based composite material, the high-temperature oxidation resistant coating made of cracked carbon is formed on the surface of the carbon fiber, the thickness of the high-temperature oxidation resistant coating is reasonably controlled to serve as a reinforcement body, and the density of the reinforcement body is controlled within a reasonable range; according to the coating, the boron nitride matrix and the carbon fibers are uniformly mixed, direct oxidation of the carbon fibers in the coating can be protected and delayed, certain mechanical properties are kept in a high-temperature environment, the strong interaction between the boron nitride matrix and the carbon fibers is reduced, the excellent mechanical properties of the whole material are achieved, and brittle fracture is avoided. Meanwhile, due to the existence of the high-temperature oxidation resistant coating, the skeleton stability of the reinforcement is also guaranteed, the linear ablation rate of the composite material is reduced, and the ablation resistance is improved.

The application discloses a method for recovering graphite from carbon residues of waste lithium ion batteries and regenerated graphite, and relates to the technical field of lithium battery recycling. The carbon residues of waste lithium ion batteries after acid leaching are subjected to heat treatment, in the heat treatment process, the inorganic impurities and organic impurities in the carbon residues can be dissociated into smaller particles, which is convenient for removal in subsequent processes; the pyrolysis carbon residues obtained through heat treatment are subjected to scattering treatment and screening to obtain small particle materials, and the excess large particle impurities are removed; then, through grinding and grading, graphite coarse powder with a particle size Dv50 of 12-15 mu m is obtained, and since the ash impurities are mainly concentrated in the fine powder, the ash can be effectively removed after grading. The heat treatment-scattering, screening-grinding and grading linkage technical means proposed in the application does not need to add additional chemical reagents, but only relies on several physical technical means, which not only can achieve the effect of removing ash impurities, but also can effectively remove amorphous carbon, and the method is simple, easy to operate, safe and environment-friendly.

The utility model provides a high-melting-point graphite pipe for elemental analysis, which belongs to the technical field of spectral analysis and comprises a circular hollow graphite pipe main body and transverse support parts symmetrically arranged on two sides of the graphite pipe main body, an inner pyrolytic carbon layer is deposited on the inner wall of the graphite pipe, a porous structure is arranged in the inner pyrolytic carbon layer, and an outer compact pyrolytic carbon layer is further deposited on the surface of the inner pyrolytic carbon layer. Through the inner pyrolytic carbon layer and the outer compact pyrolytic carbon layer, in the high-temperature working process, the inner wall pyrolytic carbon layer can be selectively consumed to form a compact glassy carbon film, a self-adaptive protection mechanism enables the graphite tube to still keep stable analysis performance under extreme conditions, reaction or permeation of a detected element and graphite at high temperature is reduced, and the analysis accuracy of the graphite tube is improved. The phenomenon of cross contamination is reduced, the memory effect of the graphite pipe is reduced by 70%, but the memory effect of a traditional pyrolytic graphite pipe can only be reduced by 30-40%, and the graphite pipe is particularly suitable for analysis of high-melting-point elements.

The application discloses a kind of carbon-tao collaborative skeleton modified C / C composite material and preparation method thereof, belong to ceramic modified C / C composite material technical field.The method disclosed in the application comprises the following steps: low-density C / C composite material is immersed in initial emulsion, then sequentially heat curing, drying, carbonization and deposition pyrolytic carbon treatment, obtain porous carbon matrix;ZrC suspension liquid is introduced into porous carbon matrix by suction filtration treatment, obtain carbon matrix containing carbon-tao collaborative skeleton;Carbon matrix containing carbon-tao collaborative skeleton is immersed in organic zirconium polymer solution, vacuum impregnation-drying and heat treatment are carried out several times, and carbon-tao collaborative skeleton modified C / C composite material is obtained;The method can realize the adjustment of carbon and ceramic interface reaction by adjusting the filtration parameters, and solves the technical problem of poor interface compatibility between carbon matrix and ceramic particles in the ceramic modification process.

The invention relates to the field of soil nitrogen fixation, in particular to nitrogen fixation biochar particles and a preparation method and application thereof. The preparation method of the nitrogen-fixing biochar particles provided by the invention comprises the following steps: pyrolyzing a biomass raw material to obtain pyrolytic carbon; mixing the pyrolytic carbon with a strong alkali solution, and reacting to obtain nitrogen-fixing biochar particles; the strong base in the strong base solution is alkali metal hydroxide. The number of oxygen-containing functional groups on the surfaces of the nitrogen-fixing biochar particles is increased by adopting strong base modification, and meanwhile, the specific surface area and the porosity of the nitrogen-fixing biochar particles are increased; the method reduces migration of dissolved nitrogen, facilitates fixation of nitrogen in the soil, effectively relieves nitrogen runoff and leaching loss caused by application of nitrogen fertilizer in the soil, improves the utilization rate of the nitrogen fertilizer, and relieves the pollution problem of lake water around a farmland.

The invention relates to a method for recycling an exhaust gas (50) from chemical vapor deposition or permeation of pyrolytic carbon, the exhaust gas comprising hydrogen, C1 to C4 light unsaturated hydrocarbons, and C5 + heavy hydrocarbons, the method comprising the steps of: a) removing (60) the heavy hydrocarbons (501) from the exhaust gas, b) catalytically hydrogenating (80) the light unsaturated hydrocarbons, c) removing (60) the heavy hydrocarbons (501) from the exhaust gas, and d) removing (60) the heavy hydrocarbons (502) from the exhaust gas. The present invention relates to a process for the production of light saturated hydrocarbons, comprising the steps of: a) adding an exhaust gas (402) obtained after carrying out step a) to a reaction chamber (30) in order to remove them by converting them into C1 to C4 light saturated hydrocarbons, the catalytic hydrogenation step being carried out for the exhaust gas obtained after carrying out step a) and consuming a portion of the hydrogen present in said exhaust gas, and c) adding the exhaust gas (402) obtained after carrying out step b) to the reaction chamber (30), pyrolytic carbon is formed by chemical vapor deposition or permeation using C1 to C4 light saturated hydrocarbons present in the thus added exhaust gas.

The invention relates to a preparation method of a CVD method silicon carbide coating, and relates to the field of coating preparation, and the preparation method comprises the following steps: carrying out ultrasonic cleaning and drying on a substrate to obtain a cleaned substrate; performing pyrolytic carbon deposition on the cleaned substrate to obtain a substrate with a pyrolytic carbon layer; activating the matrix with the pyrolytic carbon layer to obtain an activated matrix; introducing mixed reaction gas to perform deposition treatment on the activated substrate to obtain a substrate with a silicon carbide coating; and carrying out heat treatment and passivation treatment on the substrate with the silicon carbide coating to complete the preparation of the silicon carbide coating by the CVD method. The compactness, the bonding strength and the stability of the coating are improved, and the silicon carbide coating is compact, uniform and free of cracks and has good coverage on a matrix in a complex shape.

This invention discloses a solid heat carrier heating device, comprising a pyrolysis reactor, a fluidized bed furnace, a gas-solid separator, a mechanical return feeder, and a flue gas generator. The pyrolysis reactor is used to feed solid pyrolysis reactants into the fluidized bed furnace for reaction. The gas-solid separator is used to separate the reaction products in the fluidized bed furnace into gas and solid components to obtain a solid heat carrier, which is then transported to the fluidized bed furnace for reaction via the mechanical return feeder. The flue gas generator is used to supply flue gas into the fluidized bed furnace to heat the solid pyrolysis reactants. This invention also discloses a flue gas generator. The solution of this invention is applicable to the pyrolysis of organic solid wastes such as waste plastics, oil sludge, tires, and sewage sludge. Through efficient combustion and heating methods, the large solid heat carrier furnace achieves high-efficiency pyrolysis carbon combustion, stable bed temperature and bed pressure, and has a function for regulating the flow rate of circulating solid particles.

Disclosed is a preparation method for a heteroatom-doped carbon material, comprising the following steps: (S1) uniformly mixing a phenolic monomer, an aldehyde monomer and a non-metal doping source, then pre-polymerizing same to obtain a liquid phenolic resin oligomer, then adding a metal doping source and uniformly mixing same, and then curing same to obtain a solid precursor; (S2) sequentially subjecting the solid precursor to crushing, pyrolysis and carbonization, and then an activation process for pore forming, to obtain a carbon material having a porous structure; (S3) pulverizing the carbon material having the porous structure, placing same into a reactor and introducing a silicon-containing gas, performing silicon deposition, and then subjecting same to stabilization treatment to obtain a silicon-carbon composite material; and (S4) performing carbon coating on a surface of the silicon-carbon composite material to obtain a product heteroatom-doped carbon material. By doping with non-metal and metal heteroatoms in a specific order, the present invention improves the kinetic properties of lithium ions and electrons, inhibits composite material particle breakdown during charging and discharging, and improves interface stability.

The utility model provides a kind of sludge treatment system of coupling carbonization and gasification, including pyrolysis unit, combustion unit, waste heat recovery unit and flue gas collection unit. Among them, pyrolysis unit includes pyrolysis furnace and cyclone separator, the top of pyrolysis furnace is equipped with gas injection port, it is suitable for the temperature of fluidized gas in pyrolysis furnace is adjusted by inputting oxygen, to control pyrolysis furnace in gasification reaction or carbonization reaction;Cyclone separator is suitable for the pyrolysis product is carried out gas-solid separation and obtains pyrolysis gas and pyrolysis carbon, the outlet of cyclone separator includes gas product outlet and solid product outlet;Combustion unit is suitable for receiving pyrolysis gas generated in pyrolysis furnace and carries out combustion reaction, obtains flue gas;Waste heat recovery unit includes heat exchange component, heat exchange component is communicated with combustion unit, it is suitable for receiving and recovering heat in flue gas by heat transfer;Flue gas collection unit is communicated with heat exchange component, it is suitable for purifying and collecting flue gas.

The invention belongs to the field of research and development and technical application of gas adsorption separation materials, and discloses a preparation method and application of a carbon molecular sieve neon / helium separation adsorbent. The carbon molecular sieve adsorbent is prepared by pyrolysis and carbonization of a polyimide precursor with an adjustable structure. Monomers with carboxylic acid groups are introduced in synthesis of a polyimide precursor, the molar ratio of the monomers is adjusted, the structure of the carbon molecular sieve is regulated and controlled through the pre-crosslinking effect in the subsequent carbonization process, more defect and sub-micropore structures can be formed, and therefore neon selective adsorption micropores are achieved. The obtained neon / helium separation adsorbent has the advantages of being large in neon adsorption capacity, high in neon / helium adsorption separation selectivity, good in stability and reproducibility, easy to produce on a large scale and the like, and has wide prospects in preparation of high-purity and ultra-high-purity helium and purification and separation application of electronic special gas.

The invention provides an algae source soil conditioner for synergistically passivating copper and cadmium as well as a preparation method and application of the algae source soil conditioner, and belongs to the technical field of soil remediation. The algae source soil conditioner comprises an algae source active component and a biochar-based carrier. By combining activity retention of the seaweed extract and functional modification of pyrolytic carbon, the content of copper ions and cadmium ions in soil can be remarkably reduced, meanwhile, the activity of soil urease, sucrase and dehydrogenase is promoted to be remarkably improved, and the synergistic effect of heavy metal passivation and soil ecological function restoration is achieved; the preparation method disclosed by the invention is simple and easy to operate, and the prepared algae source soil conditioner has a multi-stage pore structure and rich surface functional groups.

This invention relates to a method for preparing composite materials, specifically a method for preparing a high thermal conductivity C / SiC-ZrB2 composite material with a three-dimensional interpenetrating network structure, and the high thermal conductivity C / SiC-ZrB2 composite material itself. This invention addresses the shortcomings of existing technologies, such as the high difficulty in weaving mesophase pitch-based fiber preforms, which makes it difficult to obtain high thermal conductivity triaxial orthogonal preforms. The method of this invention utilizes a hybrid fiber formed by weaving pitch-based carbonized fibers and aramid fibers to prepare a first high thermal conductivity fiber preform. High thermal conductivity carbon nanotubes are then introduced, and a three-dimensional CNT@PyC@SiC matrix is ​​constructed by depositing a PyC pyrolytic carbon layer and a SiC layer. Finally, multi-component ZrB2 particles and SiC particles are used to regulate the stress compatibility between the matrix, resulting in a high thermal conductivity C / SiC-ZrB2 composite material with excellent thermal conductivity and mechanical properties.

The invention provides a device and method for smelting magnesium and co-producing carbon nanotubes through carbon thermal reduction in a vacuum electric arc furnace, the device comprises a magnesium smelting electric arc furnace, MgO, coke, biological pyrolytic carbon and methane gas are used as raw materials to be added into molten iron in the magnesium smelting electric arc furnace for carbon thermal reduction, and mixed furnace gas containing metal magnesium steam, iron steam and CO is obtained; the mixed furnace gas is introduced into a heat compensation chamber, iron-containing chloride is introduced into a quenching condenser to be mixed with the mixed furnace gas flowing out of the heat compensation chamber so as to conduct isentropic expansion and cooling treatment on the mixed furnace gas, and then ternary mixed powder is obtained after the mixed furnace gas is cooled through a first cooling chamber; performing metal magnesium vacuum distillation and carbon annealing operation on the ternary mixed powder offline; residual gas in the first cooling chamber is subjected to secondary cooling through the second cooling chamber; and further, carbon thermal reduction magnesium smelting and carbon nanotube co-production are realized.

The application belongs to the technical field of ceramic matrix composite, and discloses a hypersonic aircraft hot end component and a preparation method and application thereof, and the method comprises the following steps: (1) printing a green body of the hypersonic aircraft hot end component to be prepared by taking ceramic-metal silicon-binder composite powder as raw materials; wherein the raw materials of the ceramic-metal silicon-binder composite powder comprise ceramic powder, metal silicon and organic binder; (2) after the green body is solidified, pressureless sintering is first carried out under the condition of nitrogen, then carbon precursor is infiltrated and reaction sintering is carried out, and then the hypersonic aircraft hot end component is obtained. By means of nitriding, uniformly distributed silicon nitride bonding phases and pyrolytic carbon are generated in the body, reaction sintering silicon infiltration converts the pyrolytic carbon into silicon carbide, the obtained material contains in-situ nitrided silicon nitride and secondary silicon carbide (beta-SiC) generated by reaction sintering silicon infiltration as bonding phases, and has more excellent mechanical properties.

The invention relates to the field of C / C-SiC composite materials, and discloses a reinforcement which is sequentially provided with a pyrolytic carbon interface layer, a TiC-carbon composite interface layer and a SiC layer from inside to outside. Wherein the TiC-carbon composite interface layer comprises nano TiC particles and resin carbon, the nano TiC particles are arranged in the pyrolytic carbon interface layer and the SiC layer in a pinning manner, and the resin carbon provides a carbon source for the SiC layer. A reaction carbon source is provided for the SiC layer through the TiC-carbon composite interface layer, the PyC interface strength is reserved, meanwhile, through pinning of nano TiC particles at the interface, crack propagation is controlled, the composite material interface connection strength is improved, TiC and silicon can generate an anti-oxidation barrier composed of Ti5Si3 and Ti3SiC2, and the stability of a material friction layer is improved.

The invention provides an electric furnace thermal reduction magnesium smelting co-production silicon carbon negative electrode material and a device thereof. MgO, SiO2, coke, biological pyrolytic carbon and methane gas are used as raw materials and are added into a magnesium smelting electric arc furnace for carbon thermal reduction to obtain mixed furnace gas; the mixed furnace gas enters a quenching condenser to be subjected to isentropic expansion and cooling treatment after being subjected to heat compensation through a heat compensation chamber, and solid-phase particles and cooling furnace gas are obtained; the solid-phase particles and the cooling furnace gas are cooled by a first cooling chamber to obtain ternary mixed powder, and the ternary mixed powder is subjected to the operations of metal magnesium vacuum distillation, magnesiothermic reduction and silicon monoxide disproportionation reaction offline; residual gas in the first cooling chamber is secondarily cooled through the second cooling chamber, and a primary material required by the silicon-carbon negative electrode material is co-produced in a gas-phase reaction mode in the magnesium smelting process, so that near-full continuous production of main links of the silicon-carbon negative electrode material and co-production coupling of carbon thermal reduction of magnesium metal are realized.