90 results about "Aluminothermic reaction" patented technology

The invention relates to the technical field of metal materials, and discloses a preparation method of high-purity vanadium, which comprises the following steps: step 1, controlling the purity, granularity and content of raw materials for preparing a vanadium-aluminum intermediate alloy; 2, carrying out an aluminothermic reaction in a vacuum aluminothermic smelting furnace; thirdly, a plate ingot is smelted in a vacuum electron beam horizontal furnace for the first time; fourthly, the plate ingot is smelted in the vacuum electron beam horizontal furnace for the second time; and 5, smelting the high-purity vanadium ingot in a vacuum electron beam ingot pulling furnace. According to the method, traditional slag formers such as CaO are not used, so that alloy components are more stable in the smelting process, component fluctuation caused by the reaction of the slag formers and main reactants is reduced, the reaction temperature and degree are controlled by controlling the addition amount of the Al2O3 cooling material, energy is saved, and the smelting cost is reduced; the beneficial effects that a CaO slag former does not need to be used, and introduction of impurities is avoided are achieved.

The present invention provides an aviation-grade vanadium-aluminum alloy and a preparation method thereof, and belongs to the field of alloy technology. The preparation method of the aviation-grade vanadium-aluminum alloy provided by the present invention comprises the following steps: mixing vanadium pentoxide and aluminum particles and then pressing to obtain a mixture sheet; subjecting the mixture sheet to a vacuum aluminothermic reaction under side-blowing argon gas, and then cooling to obtain a vanadium-aluminum alloy ingot with an upper layer of an aluminum oxide layer; the angle between the argon gas pipe of the side-blowing argon gas and the horizontal direction is 30 to 60°; removing the aluminum oxide layer on the upper layer of the vanadium-aluminum alloy ingot to obtain an aviation-grade vanadium-aluminum alloy. The present invention can destroy the high vacuum area by the angle of the side-blowing argon gas during the vacuum aluminothermic reaction, so that the aluminum oxide slag inside the vanadium-aluminum alloy is completely separated from the vanadium-aluminum alloy ingot, and a floating aluminum oxide layer is formed on the surface of the vanadium-aluminum alloy ingot, and at the same time, it is in an argon gas protective atmosphere to ensure that the nitrogen element in the vanadium-aluminum alloy ingot will not increase, thereby reducing the aluminum oxide inclusion content and nitrogen content of the vanadium-aluminum alloy.

The invention provides a gas phase change rock breaking device and method based on an aluminothermic reaction, and belongs to the technical field of rock blasting. The rock breaking device comprises a graphite excitation pipe, a liquefied air bag and a sealing cover, the excitation pipe is filled with thermite, and thermite reaction can be carried out to release heat; the liquefied air bag is hermetically sleeved outside the excitation tube, is filled with liquid oxygen or liquid nitrogen and is changed into gas under the action of heat released by the excitation tube, and rock mass fracture is realized by volume expansion. By arranging a multi-section excitation pipe serial connection structure, adopting the industrial graphite excitation pipe, designing a liquid oxygen or liquid nitrogen double-medium system and using the polyethylene degradable material bag body, the safety, the economical efficiency and the environmental adaptability of open-air rock mining are remarkably improved.

According to the composite current collector manufactured by coating the two sides of the aluminum foil with the single-walled carbon nanotube coatings, the two sides of the thin rolled aluminum foil are precisely coated with the single-walled carbon nanotube coatings; a single single-walled carbon nanotube with comprehensive technical characteristics of relatively long length, proper diameter, relatively few growth defects, relatively high conductivity, relatively high mechanical strength and bending flexibility is used as a raw material, and two surfaces of a rolled aluminum foil are respectively and precisely coated to prepare coatings mainly comprising the single-walled carbon nanotube; the single-walled carbon nanotubes in the coating have high three-dimensional physical entanglement density, tensile strength and conductivity, the mechanical property of the composite current collector is improved, belt breakage is prevented, the novel composite current collector meets the smooth requirement of the battery production process, and the energy density of the battery is improved; the use amount of aluminum foil in the positive electrode current collector is reduced, direct contact between the aluminum material and the positive electrode active material is avoided, heat released by aluminothermic reaction during thermal runaway of the battery is reduced, and the safety of the battery is improved.

The present invention provides a method for producing a molybdenum-vanadium-aluminum-chromium alloy with high uniformity. The composition of the molybdenum-vanadium-aluminum-chromium alloy is as follows: Mo 25% - 28%, V 24% - 27%, Cr 28% - 31%, with the balance being Al, O ≤ 0.05%, C ≤ 0.05%, and the segregation of the main content being < 0.6%. It relates to the field of metallurgical technology. The technological steps are as follows: (1) Prepare an ammonium molybdate-ammonium dichromate-ammonium metavanadate precursor by hydrothermal method using sodium molybdate, sodium metavanadate, sodium dichromate, and ammonium chloride; (2) Perform high-temperature treatment on the precursor to obtain a MoO3 / V2O5 / CrO3 composite material; (3) Mix the MoO3 / V2O5 / CrO3 composite material, refined aluminum powder, and calcium oxide in proportion, load them into a furnace and ignite to undergo a thermite reaction to obtain a molybdenum-vanadium-aluminum-chromium alloy ingot. Compared with the molybdenum-vanadium-aluminum-chromium alloy produced by the traditional thermite method, the uniformity of the present invention is greatly improved, and it can be used for the production of titanium alloys such as TB2, TB9, TB15, and TB16.

The invention relates to a composite thermite for forcible entry and a preparation method thereof. The composite thermite comprises an aluminothermic reaction agent; a fluxing agent; a binder; and a strong oxidant. Wherein the thermit reaction agent is mixed powder composed of fuel metal particles and metal oxide particles, and the surfaces of the fuel metal particles are subjected to coating modification treatment through a fluorine-containing polymer; in the composite thermite, the mass ratio of the thermite reaction agent is 40%-75%, the mass ratio of the fluxing agent is 2%-10%, the mass ratio of the binder is 5%-20%, and the mass ratio of the strong oxidant is 5%-30%. The composite thermite disclosed by the invention is prepared into a blocky or columnar structure through a compression molding process or a curing molding process, is used for forcible entry of metal or non-metal obstacles, improves the forcible entry performance, is high in medicament environment adaptability and good in use effect, and can be produced on a large scale.

The invention belongs to the technical field of refractory materials, and discloses an aluminothermic reaction sintered alumina hollow sphere heat-insulating refractory material and a preparation method thereof. The aluminothermic reaction sintered aluminum oxide hollow sphere heat-insulating refractory material comprises the following raw materials in percentage by mass: 20-30% of aluminum oxide hollow spheres with the particle size of 3-5mm, 10-20% of aluminum oxide hollow spheres with the particle size of 1-3mm, 5-15% of aluminum oxide hollow spheres with the particle size of 0.1-1mm, 2-10% of light-burned magnesia, 20-30% of activated aluminum oxide powder, 15-25% of magnesium peroxide powder and 4-7% of metal aluminum powder, a binding agent accounting for 2-4% of the total mass of the raw materials is added. According to the refractory material, aluminum and magnesium peroxide are subjected to aluminothermic reaction and self-reaction sintering, a continuous spinel structure is formed on the surfaces of the matrix and the aluminum oxide hollow spheres, high strength is achieved through sintering at low temperature, and low thermal conductivity and high thermal shock stability are both considered.

The invention provides a niobium-tungsten alloy and a preparation method thereof. The preparation method comprises the following steps: 1) performing vacuum reduction sintering on a powder blank comprising niobium powder, first tungsten powder, first molybdenum powder and yttrium powder to obtain a niobium-tungsten-molybdenum alloy strip; (2) carrying out aluminothermic reaction on powder comprising niobium oxide, aluminum powder, second tungsten powder and second molybdenum powder to obtain a niobium-tungsten-molybdenum-aluminum alloy block; (3) the niobium-tungsten-molybdenum-aluminum alloy block is subjected to vacuum electron beam melting, and a niobium-tungsten-molybdenum alloy plate is obtained; 4) forming a smelting electrode by using the zirconium sheet niobium-tungsten-molybdenum alloy strip, the niobium-tungsten-molybdenum alloy plate and the niobium wire; and (5) the smelting electrode is subjected to vacuum electron beam smelting, and the niobium-tungsten alloy is obtained and comprises, by mass, 4.5%-5.5% of tungsten, 1.5%-2.5% of molybdenum, 1.4%-2.2% of zirconium, smaller than or equal to 0.08% of yttrium, 0.002%-0.02% of carbon, smaller than or equal to 0.2% of tantalum, smaller than or equal to 0.023% of oxygen, smaller than or equal to 0.015% of nitrogen, smaller than or equal to 0.002% of hydrogen and the balance niobium and inevitable impurities, and the inevitable impurities must contain yttrium.

The invention discloses a battery thermal runaway self-inhibition coating based on a heat absorption type reverse thermit reaction as well as a preparation method and application thereof. The battery thermal runaway self-inhibition coating comprises the following raw materials in percentage by weight: 40-60% of Fe2O3, 15-25% of Al powder, 20-35% of a heat absorption additive, 5-10% of a binder and 0-5% of a trigger regulator, the heat absorption additive is Bi2O3 or SrCO3; the binder is a potassium silicate aqueous solution or high-temperature-resistant polysiloxane resin; the trigger regulator is copper oxide or manganese dioxide. The coating is not a single functional material, but is a'reaction system ', an thermit reaction is converted into an endothermic reaction by introducing an endothermic additive, and a product of the coating can be fused and sintered in situ to generate a compact porous ceramic-metal composite heat insulation layer during the endothermic reaction, so that a battery cell can be isolated in space, and the performance of the battery cell is improved. And heat radiation can be effectively blocked due to low heat conductivity, so that double insurance of heat absorption and isolation is realized.

The invention belongs to the field of vanadium-aluminum alloy smelting. The invention discloses a preparation method of a high-density low-defect vanadium-aluminum alloy. The method comprises the following steps: crushing raw materials; drying the raw materials; aluminum is prepared according to the amount of residual aluminum in the alloy accounting for 106%-108% of the theoretical amount of aluminum participating in the oxidation-reduction reaction, and the dried raw materials are evenly mixed; the mixed materials are put into a smelting furnace, and the composite flux is flatly laid on the materials; tiling titanium powder on the composite flux; igniting the titanium powder to carry out thermit reaction on the furnace charge in the furnace; gradient extreme cooling is conducted on the alloy, and sequential solidification from bottom to top is achieved at the temperature gradient of 50-100 DEG C / h; and after solidification, disassembling the furnace, carrying out water quenching, and cooling to obtain the vanadium-aluminum alloy. According to the method, the problems of surface oxidation, internal cracking, bottom loosening and the like of the vanadium-aluminum alloy can be synchronously solved, and the compactness and quality of the vanadium-aluminum alloy are remarkably improved.

The present invention discloses a method for controlling the yield of vanadium-aluminum alloy, which specifically comprises the following steps: (1) using a copper crucible and a graphite furnace body as a thermite reaction vessel; (2) mixing flaky vanadium pentoxide, aluminum particles and a slag-forming agent uniformly and adding the mixture to the thermite reaction vessel; (3) placing the reaction vessel filled with the mixed raw materials in a cooling pool with circulating water and installing a furnace cover; (4) igniting a magnesium strip to initiate the thermite reaction; (5) removing the furnace cover and the furnace body 5 to 8 minutes after the thermite reaction ends; (6) stopping the cooling water supply when the alloy ingot cools to 950°C and installing a heat-insulating furnace cover on the copper crucible; (7) cooling the alloy ingot naturally for 24 to 48 hours, and finishing the alloy after cooling to obtain a vanadium-aluminum alloy product. The present invention can increase the yield of vanadium-aluminum alloy to more than 86%.

The invention provides a low-oxygen low-nitrogen aluminum-niobium intermediate alloy and a preparation method thereof, and belongs to the technical field of intermediate alloys. The preparation method of the low-oxygen low-nitrogen aluminum-niobium intermediate alloy comprises the following steps that a niobium source, an aluminum source and an oxidizing agent are mixed, then charging is conducted under the argon and vibration conditions, and a mixture is obtained; and the mixture is sequentially subjected to a thermit reaction and cooling under the vibration condition, and the low-oxygen low-nitrogen aluminum-niobium intermediate alloy is obtained. According to the method, charging is carried out under the argon and vibration conditions, air remaining in gaps of mixture particles can be eliminated, introduction of oxygen and nitrogen in the thermit reaction process is reduced, and therefore the oxygen and nitrogen content of the aluminum-niobium intermediate alloy is reduced; and the thermit reaction and cooling are carried out under the vibration condition, so that thick dendritic crystals formed in the alloy solidification process can be crushed, the purpose of grain refinement is achieved, fine grain strengthening is achieved, and the obdurability of the aluminum-niobium intermediate alloy is improved.

A method and cascade reactor system for producing elemental rare earth metals and rare earth-aluminum alloys via aluminothermic reduction are disclosed. The method involves combining rare earth oxides or halide salts with aluminum powder, initiating a thermite-type reaction under inert or controlled atmospheric conditions, and recovering the molten metal product. Fluxing agents may be used to enhance slag fluidity and phase separation. The cascade reactor comprises multiple thermite zones with staged ignition, thermal transfer mechanisms, and slag separation interfaces, enabling sequential reduction of mixed feedstocks. The system supports both batch and continuous formats and achieves high recovery yields, reduced aluminum contamination, and compatibility with alloying and post-purification processes. The invention is adaptable to individual rare earth species and mixed oxide concentrates, offering a scalable, energy-efficient, and environmentally favorable route to rare earth metal and alloy production.

Disclosed herein are exothermic reaction mixtures that can be used for copper-based thermite reactions. The disclosed exothermic reaction mixtures can be advantageously formulated with synthetically made copper oxide(s), which can improve consistency and stability of thermite reactions. An example exothermic reaction mixture includes an alloy comprising copper and aluminum and a metal oxide comprising Cu2O and CuO. Also disclosed are methods of preparing the exothermic reaction mixture and methods of welding that include the exothermic reaction mixture.

The invention discloses a Ni3Al-PPy composite wave-absorbing material as well as a preparation method and application thereof, and belongs to the technical field of electromagnetic wave-absorbing materials. The Ni3Al-PPy composite wave-absorbing material with a core-shell structure is successfully synthesized by combining a thermit reaction with a chemical oxidation polymerization method and hydrochloric acid modification. By regulating and controlling the addition amount of the pyrrole monomer in the range of 0.25-0.75 mL, the continuous regulation and control of the thickness of the PPy shell layer from 0.22 [mu] m to 0.31 [mu] m is realized. When the thickness of a PPy shell layer is 0.27 mu m and the matching thickness of the composite wave-absorbing material is 3.0 mm, the minimum reflection loss and absorptivity gt of-40.0 dB are obtained at 9.27 GHz; and when the matching thickness is 2.0 mm, the effective absorption bandwidth reaches 3.02 GHz. According to the invention, the effect of the shell layer thickness in regulating and controlling the performance of the wave-absorbing material with the core-shell structure is illustrated, and a feasible strategy is provided for designing a high-performance light-weight wave-absorbing material with adjustable electromagnetic parameters and enhanced durability.

This invention provides a method for producing high-purity aluminum-niobium-tantalum master alloys and co-producing ammonium fluoride, belonging to the fields of metallic materials and inorganic chemicals. The invention involves mixing fluoroniobic acid, fluorotantalic acid, and ammonia water for a precipitation reaction to obtain a precipitate and an ammonium fluoride solution. The ammonium fluoride solution is then concentrated, cooled for crystallization, dehydrated, and dried sequentially to obtain ammonium fluoride. The precipitate is then dried and oxidized and calcined sequentially to obtain an oxide. The oxide, aluminum powder, potassium chlorate, and calcium fluoride are mixed and subjected to a vacuum aluminothermic reaction to obtain the high-purity aluminum-niobium-tantalum master alloy. This invention, considering both broadening the range of raw material selection and optimizing the production process, reacts fluoroniobic acid, fluorotantalic acid, and ammonia water to produce niobium hydroxide and tantalum hydroxide precipitates, which are then oxidized and calcined to form niobium and tantalum oxides. The high-purity aluminum-niobium-tantalum alloy is then prepared using a vacuum aluminothermic reaction. Simultaneously, ammonium fluoride can be co-produced, resulting in high raw material utilization.

The invention discloses a method for directly preparing ferrovanadium by taking ammonium vanadate as a raw material. The method comprises the steps of raw material pretreatment, vacuum heating decomposition, furnace charge mixing and aluminothermic reduction smelting. In the step of vacuum heating decomposition, the pretreated ammonium vanadate is loaded into a double-cone rotary vacuum dryer to be subjected to vacuum heating, so that the pretreated ammonium vanadate is decomposed, ammonia gas and water vapor are released, and a decomposition product with V2O4 and V2O5 as main components is obtained; the step of mixing the furnace charge comprises the following steps: uniformly mixing a decomposition product with aluminum powder, lime, iron powder and a cold charge according to the mass ratio of (60-120): (30-65): (6-10): (6-10): (6-15) based on the mass of V2O5; in the aluminothermic reduction smelting, a magnesium rod is used for igniting furnace charge to carry out aluminothermic reaction; and after the reaction is finished, cooling to room temperature to obtain the ferrovanadium alloy. The method can effectively simplify the process flow, reduce the production cost, improve the product quality, and solve the technical problems of tedious steps and high cost of the traditional process.

The present invention discloses a method for preparing metallic titanium by electrolytic separation of aluminum-titanium alloy, which mainly involves using fluotitanate to smelt spongy TiAl, TiAl3, Ti3Al alloy or a mixture thereof through aluminothermic reduction, and evaporating the fluotitanate and other incompletely reacted low-boiling impurities therein at high temperature. By means of molten salt electrolysis, using the spongy TiAl, TiAl3, Ti3Al alloy or a mixture thereof prepared by aluminothermic reaction as the anode material and the molten salt of cryolite and chloride system as the electrolyte, the Al in the anode is electrolytically separated, high-purity metallic Al is obtained at the cathode, and high-purity spongy titanium is obtained at the anode. The present invention makes full use of the method of preparing metallic spongy titanium at high temperature through molten salt electrolysis to prepare high-purity metallic spongy titanium and high-purity metallic aluminum as a by-product. Compared with the traditional Kroll method for preparing Ti, this method is energy-saving and environmentally friendly, has a simple process, and no harmful substances are emitted.

The invention discloses a vanadium-aluminum alloy and a preparation method thereof. The preparation method comprises the following steps: S101, coating the inner wall of a water-cooled copper crucible with a magnesium oxide coating; s102, vanadium pentoxide with the bulk density larger than 1.05 g / cm < 3 >, metal aluminum particles and a cooling agent are evenly mixed; s103, the mixed raw materials are added into a water-cooled copper crucible and subjected to water cooling, and after compaction, an aluminothermic reaction is triggered in the mode that an ignition agent is ignited on the upper portion; and after the thermit reaction is finished, water cooling is continuously carried out, and finally the finished vanadium-aluminum alloy is obtained. According to the preparation method, the water-cooled copper crucible is adopted as a reaction device, the solidification speed of alloy liquid can be increased, the specific gravity segregation of the alloy is effectively improved, and air holes in the alloy are reduced by controlling the bulk density of vanadium pentoxide, coating the inner wall of the crucible with a magnesium oxide coating and the like; therefore, the high-quality vanadium-aluminum alloy which is uniform in component, compact in crystal and free of obvious pores inside is obtained.

A material compacting device for a crucible thermit reaction comprises a base, a door-shaped support is fixed to the upper end of the base, two linear guide rails are arranged on the table top of the base, and the door-shaped support stretches across the two linear guide rails; a hydraulic lifting platform is arranged above the two linear guide rails, and the hydraulic lifting platform is connected with the two linear guide rails in a sliding mode through sliding blocks; a die is arranged above the hydraulic lifting platform, the die is composed of a male die and a female die, the female die is composed of a sleeve and a base, and the base and the sleeve are detachably sleeved; a pair of supporting shafts is arranged on the outer wall of the sleeve and rotationally installed in the middles of the two supporting columns of the door-shaped support. A first hydraulic cylinder is fixed above a top cross beam of the n-shaped support, and a piston rod of the first hydraulic cylinder penetrates through the cross beam to be fixedly connected with the upper end of the male die and can drive the male die to move up and down in the sleeve.

A method for producing a lithium solution according to the present disclosure comprises igniting a mixture of alpha-spodumene and metallic aluminum to cause a thermite reaction and bringing the reaction product into contact with a leaching agent to obtain a lithium solution. The leaching agent may be water or sulfuric acid. When the leaching agent is water, it is also possible to obtain a lithium solution by bringing water into contact with the reaction product without subjecting the reaction product to a sulfation treatment.

A kind of crucible for preparing aluminum vanadium alloy by aluminothermic reaction and its preparation method belong to powder metallurgy technical field.The different particle size aluminum vanadium slag is graded according to set proportion in the present application, by doping high-activity Al2O3 powder, low-melting-point anhydrous Na2CO3 powder, V2O5 powder and MgO powder, two or more of which reduce the self-powder rate of aluminum vanadium slag and forming temperature, the layered vibration form is used for filling, after drying, sintering at 810 DEG C ~ 890 DEG C for 10h ~ 15h, holding, cooling, to obtain the crucible for preparing aluminum vanadium alloy by aluminothermic reaction.The crucible provided by the present application has high density and high sintering strength, and has excellent corrosion resistance and service life.Simultaneously, when the method provided by the present application is used, vacuum or argon protection condition is not needed in sintering process, it can be realized in normal pressure air atmosphere, without vacuum system, the equipment and process are relatively simple, and the manufacturing cost is reduced.

The invention belongs to the field of vanadium-aluminum alloy smelting. The invention discloses a preparation method of a high-uniformity vanadium-aluminum alloy. The method comprises the following steps: uniformly mixing vanadium oxide, aluminum particles and a fluxing agent according to a first ratio, paving the mixture on the bottom layer of a smelting furnace, paving an ignition agent on the bottom layer material, and igniting; uniformly mixing the vanadium oxide, the aluminum particles and the fluxing agent according to the second ratio and the third ratio, and sequentially putting the mixture into the smelting furnace; after the aluminothermic reaction, the smelting furnace is subjected to standing and cooling and then is disassembled, slag and alloy in the smelting furnace are separated, the proportion of aluminum in the second proportion is higher than the proportion of aluminum in the first proportion and the proportion of aluminum in the third proportion, and the fluxing agent is a composite fluxing agent composed of CaF2, CaO and Na2CO3. According to the method, the raw material distribution mode and the components and proportion of the composite fluxing agent are optimized, the slag fluidity is improved, the vanadium yield is increased (larger than or equal to 98%), the impurity content in the prepared vanadium-aluminum alloy is reduced, and alloy segregation is inhibited.

The invention relates to the technical field of thermit reaction, and discloses an energy-saving and environment-friendly thermit reaction device which comprises a mounting frame, a reaction furnace is fixedly connected to the inner side of the mounting frame, two limiting frames are fixedly connected to the middle side of the top of the mounting frame, and rack plates are slidably connected to the interiors of the limiting frames; and a double-shaft motor is installed on the outer side of one limiting frame, one output end of the double-shaft motor is fixedly connected with a driving gear, the outer sides of the two rack plates are fixedly connected with driving frames, the outer side of the reaction furnace communicates with two fixing cylinders, and the interiors of the fixing cylinders are slidably connected with connecting pistons. Harmful gases, such as carbon dioxide, carbon monoxide and volatile organic compounds, generated in the reaction process are effectively removed by utilizing the waste gas purification structure, emission of greenhouse gases and release of air pollutants are reduced, the quality of the surrounding environment is favorably improved, and the environment-friendly requirement of modern industry is met.

The invention discloses an iron-based titanium carbide additive for improving toughness and wear resistance of steel as well as a preparation method and application of the iron-based titanium carbide additive, and relates to the technical field of alloy materials. The preparation method comprises the following steps: weighing the aluminum powder, the carbon source, the iron powder, the titanium dioxide powder and the calcium oxide powder in proportion, uniformly mixing the aluminum powder, the carbon source, the iron powder and the titanium dioxide powder to obtain mixed powder, and granulating into particles; pre-roasting the particles to obtain pre-roasted particles; mixing the weighed calcium oxide powder with a binder in proportion to obtain paste, coating the pre-roasted particles, then drying the coated pre-roasted particles, and preparing the coated pre-roasted particles into a core-spun yarn; and molten steel is molten, the cored wire is fed into the deep position of the molten steel for reaction, and the iron-based titanium carbide additive is obtained. Through the synergistic effect of low-temperature pre-roasting, calcium oxide coating and cored wire adding modes, the severe thermit reaction is controlled, Al2O3 inclusion is eliminated, the titanium yield and the product performance are remarkably improved, the cost is low, and industrial production is easy.

The method for producing the niobium-nickel intermediate alloy from the niobium-aluminum recycled materials comprises the following steps that materials are prepared, specifically, the niobium-aluminum recycled materials, nickel protoxide, calcium oxide, calcium fluoride and a heat generating agent are prepared according to the mass ratio of 1: (0.4-0.8): (0.01-0.05): (0.01-0.07): (0.1-0.4) and mixed to be uniform; treating the raw materials: drying the mixed materials at 100 DEG C to remove moisture; charging into a furnace; filling the mixed material into a reaction furnace body, compacting, and then spreading an ignition agent on the material for ignition to carry out aluminothermic reaction; according to the method, the niobium element in the niobium-aluminum recycled material is reduced through an aluminothermic reduction method, meanwhile, nickel protoxide is added in the reaction process, the nickel element is prepared, and a reducing agent is aluminum in the recycling rate; the one-step reduction reaction is adopted, independent niobium oxide does not need to be adopted while the niobium-nickel intermediate alloy is prepared, and recycling of useful elements in recycled materials is improved.

The invention relates to a preparation method of a nano-structure zirconium oxide-aluminum oxide ceramic composite coating. According to the method, aluminum microspheres are introduced into a novel spherical reactive feed of a main body YSZ powder, and triggering of an in-situ thermit reaction in a thermal spraying process is utilized, so that the novel zirconium oxide-aluminum oxide thermal protection coating which takes a doped stable zirconium oxide-based solid solution with excellent heat insulation performance as a main phase and contains a uniformly dispersed CMAS corrosion-resistant aluminum oxide component is prepared. The raw materials for feeding are low in cost, and the coating preparation process is simple. And the obtained coating has excellent comprehensive performance.

The present invention relates to the technical field of molybdenum-aluminum alloy preparation, and in particular to a method for preparing an aluminum-molybdenum alloy. The method comprises the following steps: mixing molybdenum trioxide, aluminum powder, and calcium oxide to obtain a mixture; igniting a portion of the mixture as a base material to initiate a thermite reaction; and continuously feeding the remaining mixture after the thermite reaction has occurred for 4 to 6 seconds to ensure the continued thermite reaction, thereby obtaining the aluminum-molybdenum alloy. The aluminum-molybdenum alloy produced by this method has stable quality and is suitable for large-scale production.