322 results about "Al powder" patented technology

A high thermal conductive silicone composition including: (A) an organopolysiloxane having at least two aliphatic unsaturated hydrocarbon groups in one molecule and a kinematic viscosity at 25 C of 100 to 100,000 mm2 / s; (B) an aluminum powder having an average particle size of 50 μm or more; (C) a thermal conductive filler having an average particle size of 0.1 to less than 50 μm; (D) an organohydrogenpolysiloxane having two or more hydrogen atoms bonded to a silicon atom (Si—H groups) in one molecule; (E) a hydrolyzable organopolysiloxane represented by the following general formula (1); and (F) a platinum group metal catalyst having an effective amount. The high thermal conductive silicone composition can conform to the warpage of a substrate due to an increased material thickness and can maintain heat dissipation performance due to a high thermal conductivity.

The invention belongs to the technical field of electrode material preparation, and particularly relates to a preparation method of boric acid-assisted low-temperature sintered porous aluminum foil. The preparation method comprises the following steps: dispersing aluminum powder, boric acid and binder raw materials in a solvent to form dispersed slurry; and coating a matrix with the dispersed slurry, drying, sintering at 450-600 DEG C under protective gas, reacting boric acid with aluminum oxide on the surface of the aluminum powder to form low-melting-point aluminoborate, reducing the sintering temperature, promoting aluminum atom diffusion, increasing sintering neck formation, and sintering to obtain the porous aluminum foil. Boron oxide generated by decomposition of boric acid is added to react with aluminum oxide to form low-melting-point aluminoborate, the sintering liquidus temperature is reduced, aluminum atom diffusion is promoted, and low-temperature sintering at 450-600 DEG C is achieved. The aluminum powder sintered foil is suitable for energy storage devices such as an aluminum electrolytic capacitor and a lithium ion battery, has the advantages of low-temperature energy conservation, high porosity and strong mechanical property, and solves the problems of aluminum oxide obstruction and high high-temperature energy consumption of the traditional aluminum powder sintered foil.

The invention relates to the field of photovoltaic technology, in particular to a solar cell and a preparation process thereof, a laminated cell and a photovoltaic module. The preparation process comprises the following steps: providing a silicon substrate, and preparing a passivation layer on the surface of the silicon substrate; printing a conductive material on the passivation layer; sintering and curing the conductive material to form an initial grid line; performing laser processing on the initial grid line; wherein the conductive material comprises metal powder, glass powder, an organic carrier, iridium oxide, lanthanum oxide and titanium dioxide; the metal powder comprises at least one of silver powder, nickel powder, copper powder, silver coated copper, silver coated nickel and aluminum powder. The iridium oxide, the lanthanum oxide and the titanium dioxide are simultaneously added into the conductive material adopted in the preparation process, so that the power attenuation of the module is reduced.

The invention belongs to the technical field of soft magnetic materials, and particularly relates to a high-permeability low-loss FeSiAl magnetic powder core and a preparation method and application thereof. The preparation method comprises the following steps: (1) uniformly mixing pure Al powder with organic silica sol, an aluminate coupling agent, a lubricant and an organic binder to obtain coated bonding slurry; and (2) uniformly mixing FeSiAl soft magnetic powder with the coating and bonding slurry obtained in the step (1), carrying out hot-pressing curing molding at the temperature of 60-100 DEG C under a vacuum condition, and then carrying out hot-pressing sintering treatment at the temperature of 750-1000 DEG C under an oxygen-containing atmosphere condition to obtain the FeSiAl magnetic powder core with high magnetic conductivity and low loss. The FeSiAl soft magnetic powder is subjected to insulation coating and bonding treatment by adopting the coating and bonding slurry with specific composition, the high-frequency loss of the obtained magnetic powder core can be reduced by combining a specific treatment process, and the influence on the magnetic conductivity is relatively small.

The invention relates to a preparation method of a high-hardness composite coating on a titanium alloy surface, which comprises the following steps: pretreating a titanium alloy base material to remove a surface oxide layer to obtain the treated titanium alloy base material; prepared high-entropy alloy powder is dried and evenly laid on the surface of the treated titanium alloy base material, and the titanium alloy base material with the powder laid is obtained; performing laser cladding treatment on the titanium alloy base material subjected to powder laying in a protective gas atmosphere to obtain a high-entropy alloy strengthened coating; the particle size of the powder is controlled to be 65-90 microns. The Al powder, the Co powder, the Ni powder, the Ti powder and the B powder with the purity higher than 99.5 wt% are selected as raw materials, the high-entropy alloy powder and the high-strength titanium alloy matrix are molten on the surface of the high-strength titanium alloy through a laser high-energy heat source, the metallurgical bonding effect is achieved, high-entropy phase strengthening is achieved, grains can be fine, and the hardness and abrasion resistance of a surface coating can be improved. The surface hardness of the coating prepared by laser cladding of the high-entropy alloy powder on the surface of the titanium alloy is not lower than 677 HV, and the wear resistance is not lower than 1.128 hmm.

The invention provides a preparation method of a high-wear-resistance alloy lining plate, and relates to the technical field of wear-resistance alloys, carbon steel and pig iron are mixed, heated and melted, high-carbon ferromanganese, medium-carbon ferrochrome and ferrosilicon are added, heating refining is carried out, aluminum powder is added, the mixture is put into a mold, cooling and demolding are carried out, heating homogenization, quenching and cooling are carried out, and a mother plate is prepared; mixing bismaleimide, the composite powder and sepiolite fibers, heating and stirring, coating a mother board with the mixture, firstly applying negative pressure, then applying positive pressure, heating and cooling to obtain a substrate layer; and placing the mother board in magnetron sputtering equipment, sputtering on the substrate layer to obtain a chromium nitride functional layer, and cooling to obtain the high-wear-resistance alloy lining board. The composite powder is prepared by mixing and heating chromium carbide powder and a hydrogen peroxide solution, filtering, mixing with an ethanol solution and gamma-aminopropyltriethoxysilane, heating, condensing and refluxing, washing and drying, and mixing and heating with amine-terminated polyether and N, N-dimethylformamide. The wear-resistant stability of the alloy lining plate can be improved.

This invention provides a low-warpage composite PC reinforced material and its preparation method, relating to the field of composite material technology. The preparation method includes: mixing polycarbonate, polysiloxane-PC copolymer, aramid pulp-resin blend, and silica-alumina powder to obtain a first mixture; adding additives to the first mixture and mixing again to obtain a second mixture; feeding the second mixture and glass fiber into a twin-screw extruder for melt extrusion, cooling, and pelletizing to obtain the composite PC modified material. The composite PC modified material obtained by this method exhibits high strength and strong dimensional stability, and is less prone to warping when manufactured into products, making it widely applicable in products such as mobile phone lens holders.

This invention proposes a simulation material for mechanical testing of press-loaded explosives, which, by weight, is made from the following raw materials: 65.5% ammonium sulfate, 27%–33% aluminum powder, 1.5%–4% microcrystalline wax, 1%–2% butadiene rubber, and 0.2%–0.8% graphite. The compressive and tensile strengths of the explosive charge formed by this simulation material are essentially consistent with those of the charge charge formed from polyaluminum black-2 (JHL-2) explosive. It can realistically reflect the trend and limit of strength changes during mechanical testing, and provides effective reference data for mechanical performance evaluation. It also provides relatively realistic and reasonable model parameters for the digital design of the mechanical properties of press-loaded explosives. In aging tests, tensile tests, mechanical compression tests, and dynamic Brazilian tests, using this simulation material avoids contact with energetic explosive components, increasing test safety and reducing safety hazards.

The application relates to the technical field of lithium iron phosphate battery recycling, in particular to a method for recycling waste lithium iron phosphate battery materials. Specifically, after the waste lithium iron phosphate battery is discharged, the battery is disassembled and separated under an inert atmosphere, and the battery is separately collected; the battery is mechanically pulverized after high-temperature calcination, and lithium iron phosphate coarse powder, copper powder and aluminum powder are obtained through vibration screening; the lithium iron phosphate coarse powder is added into an acid solution for leaching, the acid leaching solution is adsorbed and impurity-removed through metal impurity adsorption resin, and then lithium carbonate, ammonium dihydrogen phosphate and ferrous oxalate are added; after uniform stirring, drying, ball milling and roasting, lithium iron phosphate powder is obtained. The metal impurity adsorption resin has good complexing and stabilizing effects on various metal ions, so that the high purity of the lithium iron phosphate is ensured, and comprehensive resource utilization of the waste lithium iron phosphate battery is realized.

The embodiment of the present application provides a kind of N type TOPCon cell front silver aluminum paste and its preparation method and cell, wherein, the N type TOPCon cell front silver aluminum paste provided in the embodiment of the present application includes aluminum powder, silver powder, nano alloy powder, organic binder, glass powder and organic additive, wherein the nano alloy powder is one or more of nano silver aluminum alloy powder, nano aluminum boron alloy powder and nano aluminum silicon alloy powder.In nano silver aluminum alloy powder, nano aluminum boron alloy powder and nano aluminum silicon alloy powder, all have the characteristics of nano size particle size, high tap density, low oxygen content and high activity, so that the front silver aluminum paste added with the nano alloy powder can quickly form a good alloy with silicon at a lower sintering temperature, reduce the contact resistivity of front silver aluminum fine grid and cell, not only avoid the appearance of top needle print during EL test, but also improve the filling of cell and the efficiency of cell.

The application discloses a ladle heat-insulating high-strength light-weight castable which is prepared from the following raw materials in percentage by mass: 45-60% of mullite hollow spheres, 5-10% of expanded perlite, 5-10% of polycrystalline mullite fiber, 5-10% of magnesium oxide fine powder, 1-5% of aluminum powder, 1-5% of binding clay, 2-8% of rho-Al2O3 micro powder, 1-5% of sodium lignosulfonate, and 1-4% of SiO2 micro powder. The castable provided by the application has high strength, low thermal conductivity and good thermal shock resistance, can be used for ladle permanent layer castable, can effectively reduce the temperature of a ladle shell, plays a ladle heat-insulating role, can reduce the temperature of molten steel when a converter is tapped, reduces energy consumption, and reduces the cost per ton of steel.

This utility model relates to the field of packaging equipment and discloses an automatic air-blowing cleaning device for packaging equipment. The device includes an air source, a solenoid valve, a flow regulating valve, an intermediate relay, a sensor, an air supply pipeline, and an air-blowing nozzle. The air inlet of the solenoid valve is connected to the air source via the air supply pipeline, and the air outlet is connected to the flow regulating valve, which in turn is connected to the air-blowing nozzle, enabling targeted cleaning of specific areas. The solenoid valve receives signals from the sensor via the intermediate relay to control its opening and closing. The sensor is located at the end of the stroke of the pressure head or platen of the packaging equipment to detect the operational status in real time. This device automatically starts the air-blowing action after the pressure head or platen completes the pressing operation, promptly removing aluminum powder, debris, and other foreign objects from the equipment base or track surface. This effectively prevents foreign object accumulation from causing scratches or dents on the product, improving the yield of finished products, extending the service life of the equipment, and demonstrating good automation and practicality.

The present application relates to the technical field of battery thermal management, in particular to a preparation method of a thermal activation battery with silicon-aluminum alloy high-temperature phase change material; in the preparation method, a certain amount of aluminum powder and silicon powder are selected as raw materials and mixed to obtain a liquid alloy by heating, the liquid alloy is defoamed and degranulated, and finally the bulk alloy is cooled to obtain a block alloy, the block alloy is sliced according to the size to obtain a sheet material, and the sheet material is assembled into the battery body in a layer insertion manner; the alloy phase change material prepared by the present scheme has high thermal conductivity, suitable phase change temperature and phase change enthalpy value, thereby having strong thermal management efficiency, being beneficial to regulating and controlling the surface temperature of the battery and prolonging the service life of the battery; in the present scheme, the alloy phase change material is cut and assembled into the thermal activation battery, and has the advantages of low cost, simple operation, good use effect and the like.

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 relates to an aluminothermy welding flux for a zinc-clad steel grounding material and a welding method of the aluminothermy welding flux, and belongs to the technical field of metal material welding. In order to solve the core technical problem that joint potential matching and welding firmness compatibility are difficult to realize by an existing aluminothermy welding flux for the zinc-clad steel grounding material, the invention provides the aluminothermy welding flux for the zinc-clad steel grounding material. The aluminothermy welding flux comprises iron oxide powder, aluminum powder, tin powder and nickel powder. According to the invention, the iron-based welding flux is compounded with tin and nickel, and the tin and the nickel have a synergistic effect, so that the technical prejudice that the iron-based welding flux is difficult to adapt to zinc-clad steel welding in the field is overcome, and the unexpected technical effect is realized. The tensile strength of the connector is larger than or equal to 620 MPa, the corrosion rate is smaller than 0.05 mm / year, the conductivity loss is smaller than 5%, and the performance is obviously superior to that of a copper-based connector. The problem of compatibility of potential matching and welding firmness is fundamentally solved, galvanic corrosion is eliminated, the process is simple and convenient, the cost is controllable, and corrosion prevention and engineering reliability are greatly improved.

The invention belongs to the technical field of bonding materials, and provides a copper-core aluminum-clad composite bonding strip and a preparation method and application thereof. A high-purity copper wire is used as a core material, and a copper core with good surface activity is obtained through multiple pretreatment such as surface polishing, chemical etching and electrochemical deposition; then aluminum powder, silicon powder, copper powder, alumina powder and silicon carbide powder are mixed and subjected to ball milling, the surface of a copper core is evenly coated with the mixed powder through electrostatic spraying, a ceramic composite wire is formed through cold isostatic pressing and high-temperature sintering, the outer layer of the copper core composite wire is further coated with high-purity aluminum powder, and a coated wire of a multi-layer structure is obtained through cold isostatic pressing and high-temperature sintering; and the cladding wire is subjected to multiple hot rolling, annealing, drawing and other processes to finally prepare the copper-core aluminum-clad composite bonding strip which is applied to a power module and an IGBT (Insulated Gate Bipolar Translator) electronic device.

The invention belongs to the field of preparation of high-performance metal structure materials, and particularly relates to a method for preparing a Ti2AlNb alloy based on spherical titanium alloy powder. Commercial spherical titanium alloy pre-alloyed powder containing at least two elements of Al, Zr, Mo and V and pure niobium powder are selected as base materials, the spherical powder, the pure niobium powder and pure aluminum powder are evenly mixed according to the designed atomic proportion, a densification path of vacuum sintering or spark plasma sintering after cold isostatic pressing is adopted for preparing a consumable electrode blank, and the consumable electrode blank is prepared into a self-consumable electrode. And finally, a Ti2AlNb-based alloy cast ingot is obtained through vacuum self-consuming electric arc melting. According to the invention, not only is the technical bottleneck of inevitable gravity segregation in the smelting process of the Ti-Al intermetallic compound with high Nb content broken through, but also a brand new material preparation technical route with low cost, high performance and high stability is constructed; an industrialization feasible scheme is provided for solving the bottleneck problem of short-time high-temperature light structural materials in the aerospace field.

The application discloses a preparation method of a high-strength aluminum nitride substrate and relates to the technical field of aluminum nitride substrate preparation. The method comprises the following steps: preparing modified aluminum nitride powder; adding a non-oxygen composite sintering aid composed of fluorides and borides to the modified aluminum nitride powder to obtain a mixture; the adding amount of the composite sintering aid is 0.5wt%-5wt% of the total mass of the modified aluminum nitride powder; the mixture, a binder and a dispersant are mixed in a planetary ball mill to obtain a uniform slurry; the slurry is subjected to flow casting to form a green porcelain embryo, and then, glue removal treatment is performed under the protection of flowing inert gas to remove the binder; the green porcelain embryo after glue removal is placed in an atmosphere sintering furnace to perform a multi-stage temperature rising sintering procedure to form a ceramic body; and the sintered ceramic body is subjected to heat treatment and then cooled to obtain the aluminum nitride substrate. The application reduces the lattice thermal resistance of the aluminum nitride substrate and improves the mechanical strength of the aluminum nitride substrate.

This invention belongs to the field of refractory materials technology, specifically relating to a low thermal conductivity multilayer composite magnesium-iron-aluminum spinel brick and its preparation method. This invention uses 4-ethoxyphenylboronic acid as a modifier to introduce borate ester groups onto the surface of phenolic resin hollow microspheres, obtaining borate ester-modified phenolic resin hollow microspheres. An epoxy-based silicone resin is prepared using organosilicon resin and epoxy silane. Then, the epoxy-based silicone resin is used to modify alkaline silica sol, introducing organic polymers onto the particle surface to obtain modified silica sol. The modified silica sol is then mixed with sodium hexametaphosphate to obtain a composite binder. This invention combines high-purity magnesia, fused magnesia, fused iron-aluminum spinel, α-Al₂O₃ micropowder, metallic iron powder, metallic aluminum powder, a composite binder, and borate ester-modified phenolic resin hollow microspheres to prepare a multilayer composite magnesium-iron-aluminum spinel brick with low thermal conductivity, excellent mechanical properties, high-temperature resistance, and corrosion resistance.

This application relates to the technical field of powder metallurgy, specifically to a high-chromium-content chromium-aluminum target and its preparation method. The atomic percentage content of each element is: Cr 60-80 at%, with Al as the balance. The preparation method includes: uniformly mixing chromium powder and aluminum powder using zirconia balls to obtain a chromium-aluminum mixed powder; loading the obtained chromium-aluminum mixed powder into a rubber sleeve, sealing it after vacuuming, and performing cold isostatic pressing to obtain a chromium-aluminum billet; loading the obtained chromium-aluminum billet into a graphite mold, vacuuming, and heating for pre-sintering; continuing to heat while applying axial pressure for spark plasma sintering; cooling the sintered billet to room temperature in the furnace, demolding, and machining to obtain the high-chromium-content chromium-aluminum target. The preparation method provided by this application can effectively suppress component segregation, significantly improve the density and compositional uniformity of the target material, and has a short production cycle and low cost, making it suitable for the large-scale production of high-chromium-content chromium-aluminum targets.

The invention discloses a method for in-situ self-generation of an aluminum oxide reinforced beryllium-aluminum alloy material and the beryllium-aluminum alloy material, and belongs to the technical field of alloy material reinforcement. The method comprises the following steps: S1, mixing beryllium powder and aluminum powder with high oxygen content in a mechanical mixer for 10-36 hours to obtain beryllium-aluminum mixed powder; s2, cold isostatic pressing treatment is conducted on the beryllium-aluminum mixed powder, and a beryllium-aluminum powder blank is obtained; s3, degassing the beryllium aluminum powder blank in a vacuum state; and S4, the degassed beryllium aluminum powder blank is subjected to hot isostatic pressing treatment. On the premise that the mechanical property of the beryllium-aluminum alloy material is guaranteed, the reliability and stability of the beryllium-aluminum alloy material are improved.

This invention discloses an antioxidant porous TiAl alloy, the raw materials of which include: a mixed powder, nano-B4C, nano-NiO, and nano-SiO2. The mixed powder comprises TiH2 powder and aluminum powder; the Ti content in the mixed powder is 51-53 wt%; the weight ratio of nano-B4C, nano-NiO, and nano-SiO2 to the mixed powder is 2-3:0.5-1.5:2-3:100. This invention also discloses a method for preparing the above-mentioned antioxidant porous TiAl alloy, comprising the following steps: mixing TiH2 powder and aluminum powder to obtain a mixed powder, then adding nano-B4C, nano-NiO, and nano-SiO2 and mixing, pressing into shape, vacuum sintering, soaking in an alkaline solution, and washing with water to obtain the antioxidant porous TiAl alloy. This invention also discloses the application of the above-mentioned antioxidant porous TiAl alloy in filtering high-temperature flue gas. This invention exhibits excellent antioxidant and filtration performance.

The embodiment of the present application provides an IBC battery aluminum paste and an IBC battery, wherein the IBC battery aluminum paste provided by the embodiment of the present application comprises an organic additive, boron powder, aluminum powder, gallium powder, glass powder and an organic binder. By adding gallium powder in the aluminum paste, because the gallium element has etching effect and high density, it is faster than aluminum to drop to the silicon surface in the sintering process, so that the Ga-Si contact probability is increased, the contact resistance of the paste and the battery is reduced, and a high open circuit voltage can be maintained. At the same time, because part of the aluminum powder is replaced by gallium, the content of aluminum is reduced, which is beneficial to reducing the side effect of Al, so that the Al-Si reaction is weakened, the formed aluminum silicon corrosion pit is shallow, the recombination is reduced, so as to improve the open circuit voltage and the photoelectric conversion efficiency of the battery. Therefore, the problem that the existing IBC battery aluminum paste is easy to form metal recombination in the cooling process after being sintered into a positive electrode grid line, resulting in the decrease of the open circuit voltage and the photoelectric conversion efficiency of the battery piece is solved.

The present application relates to the technical field of aluminum alloy, and particularly provides a heat treatment free 6N01 aluminum alloy, a preparation method and application thereof, the 6N01 aluminum alloy is an extruded profile obtained by compacting, sintering, extruding and aging treatment of composite powder cold welding particles; the composite powder cold welding particles are obtained by ball milling of composite powder composed of aluminum powder and carbon nanotube and Mg and Si, and the aging treatment refers to transient aging precipitation during the natural cooling process after alloy phase extrusion; wherein, the content of Mg in the composite powder cold welding particles is 0.5-0.7wt%, the content of Si is 0.6-0.7wt%, the content of carbon nanotube is 0.5-1.2vol%, and the content of trace alloying elements is not higher than 0.5wt%. For the 6N01 aluminum alloy long profile with a single length of 26-30 meters for high iron, the present application can greatly shorten the delivery cycle and reduce the cost, and has good practical engineering significance and economic value.

The invention discloses a preparation method and application of self-healing environmental barrier coating composite powder, and aims to solve the problem that a corrosion medium further permeates into a coating to cause accelerated failure of the coating due to microcracks of the environmental barrier coating in the service process of severe conditions in an aero-engine. The preparation method comprises the following steps: 1, preparing SiO2-coated SiC powder from one-dimensional SiC powder; secondly, Al powder or first rare earth oxide powder is added into the SiO2-coated SiC powder dispersion liquid to be stirred, and composite powder and mixed salt are mixed to be subjected to high-temperature treatment; and 3, mixing the self-healing phase coated with the interface phase with the rare earth silicate matrix, and granulating to prepare the spherical powder. The thermal mismatch between the self-healing phase and the coating matrix is effectively reduced through the introduction of the interface phase, the mechanical property and the oxidation resistance of the coating are improved, the cracking resistance and the corrosion medium infiltration resistance of the environmental barrier coating are finally improved, and the stable service of the high-performance environmental barrier coating is realized.

This invention relates to the field of utility pole technology, specifically a method for manufacturing a concrete utility pole, comprising a reinforcing cage and an outer concrete layer. The method is as follows: (1) Weighing and mixing various raw materials according to the required weight proportions to prepare concrete; (2) Placing the reinforcing cage in a utility pole mold and pouring the concrete into the mold; (3) Vibrating, centrifuging, allowing the mold to stand, demolding, and curing the utility pole to obtain a concrete utility pole. The concrete is composed of the following materials mixed in the indicated weight proportions: cement, sand, 05# gravel, 10# gravel, 100-mesh aluminum powder, 100-mesh ferric oxide powder, 05# ceramic tile shell, and water, which are then mixed and solidified. Such a utility pole has the advantage of better strength.

The application provides a preparation method of a high-performance aluminum matrix composite forging, comprising the following steps: high-energy ball milling of aluminum powder and ceramic powder to obtain mixed powder; isostatic pressing of the mixed powder to obtain a preform; preheating of the preform and then forging sintering to obtain the high-performance aluminum matrix composite forging. The application completes the rapid sintering of the ultrafine aluminum matrix composite powder under pressure, the deformation, flow and mold filling process of the metal fluid through sintering forging technology, synchronously realizes the powder sintering and the forging deformation of the sintered body, and finally obtains the aluminum matrix composite forging with high compactness, high mechanical property and high-temperature stable structure.

The invention discloses a TiAl alloy and an additive manufacturing composite process preparation method and application thereof, and belongs to the technical field of titanium-aluminum alloy manufacturing. The invention discloses a preparation method of a TiAl alloy. The preparation method comprises the following steps: S1, preparing a Ti bracket by adopting a laser powder bed melting process; s2, filling the Ti stent with aluminum powder, and performing hot isostatic pressing treatment after sealing; and S3, then heat treatment is conducted, and the TiAl alloy is obtained. Wherein the energy density of the laser powder bed melting process is 60-70J / mm < 3 >; the heat treatment comprises first heat treatment, and the temperature of the first heat treatment is greater than or equal to 800 DEG C. Through flexible regulation and control of the components of the alloy and the compounding process, the prepared TiAl alloy has excellent strength and toughness, the yield strength of the TiAl alloy is larger than or equal to 672 MPa, the maximum strength of the TiAl alloy is larger than or equal to 750 MPa, and the maximum strain of the TiAl alloy is larger than or equal to 9.0%.

This invention relates to a graphene-aluminum conductor and its industrial-scale preparation method. The preparation method involves: uniformly mixing an aqueous solution of graphene oxide, an aluminum powder dispersion, and PTB protein; drying and compressing the mixed solution into a block; adding this block to molten aluminum; and casting to obtain an aluminum-based graphene intermediate alloy rod. Alternatively, molten aluminum is obtained by melting aluminum ingots, and an AlB8 aluminum-boron intermediate alloy ingot is added to the molten aluminum. A composite refining agent is blown into the molten aluminum using nitrogen gas to refine it, and the mixture is allowed to settle to obtain a mixed molten aluminum. The aluminum-based graphene intermediate alloy rod is added to a flow channel between the casting gate and the casting machine, and the mixed molten aluminum is rolled into a graphene aluminum rod, which is then drawn into graphene aluminum wire. Multiple graphene aluminum wires are concentrically stranded to prepare graphene aluminum conductors. This invention prepares graphene into an aluminum-based graphene intermediate alloy rod, and then adds graphene to the continuous casting and rolling process through a wire feeding method, achieving large-scale continuous production of graphene aluminum rods.

The application provides a combustion-supporting ball for coal combustion, which comprises an aluminum foil shell and a filling wrapped inside, and the filling comprises an oxidant, an oxidizing agent, a bulking agent and a desulfurizing agent; in the combustion-supporting ball, the components comprise, in percentage by weight, 8-10% of the aluminum foil shell, 6-10% of aluminum powder, 35-51% of the oxidant, 13-23% of the oxidizing agent, 9-19% of the bulking agent and 3-13% of the desulfurizing agent; the oxidant is selected from CuO and / or Fe2O3; and the diameter of the combustion-supporting ball is 0.7-0.8 cm. The application also provides a manufacturing method and application of the combustion-supporting ball. The combustion-supporting ball has the advantages of simple and safe manufacturing process, convenient use, small adding amount in coal combustion, good adaptability to various coal types, etc., can ensure safety in actual production, greatly improve the combustion efficiency of coal and the combustion quality of coal, and has wide popularization and application prospect.