536 results about "Aluminum composites" patented technology

The invention provides a low-cost high-specific-surface-area cerium-aluminum composite oxide, a preparation method and application thereof, and relates to the technical field of catalysts, the preparation method comprises the following steps: step S1, adding 10-40% of cerium salt, 50-90% of aluminum salt and 0-10% of lanthanum source or zirconium source into deionized water, stirring and mixing, filtering, and washing to be neutral to obtain a cerium-containing solution; step S2, impregnating an alumina carrier in the cerium-containing solution prepared in the step S1, and standing to enable the cerium-containing solution to be impregnated on the alumina carrier, so as to obtain impregnated slurry; and S3, drying the dipping slurry, and then roasting in an inert atmosphere to obtain the cerium-aluminum composite oxide. The stable cerium-aluminum composite material is formed by doping one of lanthanum and zirconium with different masses into aluminum oxide or cerium oxide, the problem that the adsorption capacity of a traditional ammonia trapping method is limited is effectively solved, and the adsorption capacity of the material to ammonia is remarkably improved.

The invention discloses a catalyst for hydrogen production through tar steam reforming and a preparation method and application thereof. The catalyst comprises a cobalt-magnesium-aluminum composite spinel carrier and an active component loaded on the cobalt-magnesium-aluminum composite spinel carrier, the active component comprises nickel and at least one metal additive selected from iron, zirconium and ruthenium. The preparation method mainly comprises the following steps: preparing the carrier by adopting a coprecipitation method, loading the active component by adopting an impregnation method, and drying and reducing to obtain the final catalyst. The catalyst is used for tar component steam reforming hydrogen production reaction, especially for treating raw materials containing phenol and water vapor at 600-700 DEG C, tar conversion can be efficiently catalyzed, product gas rich in hydrogen can be generated, hydrogen selectivity is high, and almost no methane is generated. The catalyst has the advantages of high activity, good stability, strong carbon deposition resistance and the like, and is suitable for purification and high-value utilization of biomass pyrolysis tar.

The invention belongs to the technical field of electromagnetic wire materials and manufacturing, and particularly relates to a copper-aluminum composite special-shaped enameled wire and a preparation method thereof.The enameled wire comprises a copper-clad aluminum composite conductor and an insulating paint layer coated on the outer surface of the copper-clad aluminum composite conductor; the composite conductor is composed of a copper layer and an aluminum core, and the volume ratio of the copper layer to the aluminum core is 60%: 40%-70%: 30%. The thickness of the composite conductor is 0.5-2.0 mm, the width of the composite conductor is 2.0-10.0 mm, and the width-to-thickness ratio of the composite conductor is 2-8; the eccentricity of the copper layer is less than or equal to 2.5. The enameled wire has high conductivity, light weight and high reliability, and is especially suitable for high-frequency power electronic devices such as new energy automobile motors, high-frequency transformers and photovoltaic inverters, and application scenarios with high requirements for space utilization rate, heat dissipation performance and long-term stability such as spaceflight and deep sea equipment in extreme environments.

The invention relates to the technical field of industrial visual inspection, and discloses a surface defect detection method for a copper-aluminum composite board. The method comprises the following steps: acquiring an original plate surface image through image acquisition equipment, and preprocessing to obtain a standardized image; performing texture field decomposition on the standardized image, separating out independent texture components of the copper layer and the aluminum layer, and calculating a coherence graph among the components; inputting the texture component and the coherence graph into a composite structure discrimination network, guiding feature fusion by the network according to the coherence graph, performing anomaly judgment, and outputting a pixel-level initial defect graph; and performing morphological and topological rule processing on the initial defect graph, generating a final defect contour, and performing superposition labeling on the final defect contour and the original graph. According to the method, the single material layer defect and the composite interface defect can be distinguished by separating the texture of the material layer and utilizing coherence guide analysis, and the detection precision is improved.

The invention relates to the technical field of organic synthetic chemistry, in particular to a preparation method of ethyl 2-n-butyl acetoacetate, which comprises the following specific steps: S1, preparation of a composite solid base catalyst, S2, synthesis of ethyl 2-n-butyl acetoacetate, S3, post-treatment of a reaction solution, and S4, separation and purification of a product. The preparation method has the following beneficial effects that the magnesium-aluminum composite oxide is used as a carrier, and the composite solid base catalyst loaded with potassium and lanthanum has relatively high catalytic activity and selectivity; the magnesium-aluminum composite oxide carrier has a relatively large specific surface area and rich alkaline sites, so that a good catalytic environment is provided for the reaction; as a main active component, potassium ions can effectively activate alpha-active methylene of ethyl acetoacetate and promote formation of negative ion intermediates; the introduction of lanthanum ions can adjust the electronic structure of the catalyst, enhance the stability of the active center and inhibit the occurrence of side reactions.

The invention discloses a graphene-aluminum composite material and a preparation method thereof, and belongs to the technical field of metal-based composite material preparation. The raw materials comprise modified aluminum particles and a graphene dispersing agent; the production process comprises the steps of aluminum particle interface modification treatment, graphene dispersing agent preparation, modified aluminum particle wrapping with graphene, heating pressing and heating extrusion forming. A nanometer interface modification layer is constructed on the surfaces of aluminum particles through a modifier to improve wettability and inhibit generation of Al4C3, a specially-made pressing device improves the compactness of a green body, inert gas protection is matched for extrusion, the performance of the composite material is optimized, and the problems that graphene and an aluminum matrix are poor in interface compatibility, prone to agglomeration, prone to generating brittleness at high temperature and the like are solved; the graphene is uniformly dispersed, and the composite material has excellent mechanical properties and high conductivity and is suitable for industrial mass production.

The invention relates to a copper-aluminum-based anti-electromagnetic interference cable conductor with a multilayer composite shielding structure, which comprises a conductor core layer, and is characterized in that the conductor core layer comprises a central bearing core and an inner conductor, the central bearing core is formed by twisting aramid fibers and galvanized steel wires, the inner conductor sleeves the outer side of the central bearing core, and the inner conductor comprises three layers of aluminum alloy wires; the three layers of aluminum alloy wires are alternately and reversely twisted, the sliding nesting layer is arranged on the outer side of the inner-layer conductor in a sleeving mode, six copper-aluminum composite half pipes are spliced to form a complete circular ring, T-shaped sliding grooves are formed in the splicing positions of the adjacent copper-aluminum composite half pipes, two conductive sliding blocks are arranged in the T-shaped sliding grooves, the conductive sliding blocks are made of beryllium copper elastomer materials, and the heads of the conductive sliding blocks are provided with gold-plated heads. And the outer conductor sleeves the outer side of the sliding nesting layer and is formed by bunch-stranding annealed soft copper wires in the same direction. According to the invention, excellent bending resistance of the cable is realized, wire breakage of the conductor can be avoided under a repeated bending condition, a conductive path of the conductor core layer is kept continuous and stable in the whole process, and interruption of electric energy or signal transmission caused by bending is prevented.

The invention relates to the technical field of casting, and discloses a gas turbine blade casting method which comprises the following steps: preparing a composite surface coating containing zircon powder, silicon carbide particles, alumina micro powder, a silicon-aluminum composite sol binder and a xanthan gum stabilizer; a double-layer gradient coating structure with the inner layer rich in silicon carbide and the outer layer rich in aluminum oxide is formed on the surface of the wax mold through a step-by-step coating technology; and a gas turbine blade casting is obtained through shell preparation, sintering and high-temperature alloy pouring. Through the synergistic effect of a double-phase ceramic particle system, the gradient sintering characteristic of the silicon-aluminum composite sol and the suspension stabilization effect of xanthan gum, the problems that in a traditional coating system, surface layer sintering is uneven, particles are layered and settled, and a sol system is unstable are solved, the surface roughness Ra of a casting is smaller than or equal to 2.5 micrometers, the size precision is improved by 30% or above, and the casting quality is improved. The service life of the coating is prolonged to more than 7 days.

The invention relates to a copper-aluminum composite plate and a preparation method thereof, and belongs to the technical field of metal composite materials. The preparation method comprises the following steps: S1, carrying out microstructuring treatment on the surface of a copper plate to form a rough structure formed by micron-sized pits and bulges on the surface of the copper plate to obtain a microstructured copper plate; s2, depositing a zinc intermediate layer on the surface of the microstructured copper plate through a magnetron sputtering technology to obtain a galvanized copper plate; s3, the zinc middle layer of the galvanized copper plate is attached to the aluminum plate, and the copper-aluminum composite plate is obtained through hot pressing, rolling and heat treatment in sequence; the copper-aluminum composite board has excellent interface bonding strength and toughness.

The invention relates to the technical field of metallurgy, and particularly discloses a low-cost and high-utilization-rate copper-secondary aluminum compound process which comprises the following steps: pre-treating recycled secondary aluminum; adding 0.20-0.32% of Al-80Fe intermediate alloy into the molten aluminum, further adding 0.05-0.15% of at least one of a rare earth element Y or a rare earth element Sc, stirring for 5-10 minutes, adjusting the components to be qualified, and reducing the temperature to 730-750 DEG C; transferring the molten aluminum into a degassing box, introducing argon for degassing for 15-20 minutes, and standing for 12-15 minutes; the T2 copper strip is subjected to texturing treatment, so that the surface roughness of the T2 copper strip is controlled to be 0.1-0.3 mu m, and the T2 copper strip is put into an unwinding machine after being blown off; casting-rolling compounding is conducted, and molten aluminum enters a crystallizer through a chute at the temperature of 700-720 DEG C; according to the method, the secondary aluminum is adopted as a main base material, and a closed-loop production system covering rim charge recovery and direct reuse is constructed, so that maximum utilization of raw materials is realized, and resource waste and raw material purchase cost are reduced.

The utility model relates to the technical field of grinding tools, and particularly discloses a diamond steel-aluminum composite matrix grinding wheel which comprises a first matrix. Rotating grooves are rotationally and symmetrically formed in the first base body; a rotating block is inserted into the rotating groove; a second base body is fixedly connected to the rotating block; holes in the second base body and the first base body are in threaded connection with fasteners; a plurality of grinding blocks are sintered on the upper surface of the second base body; the second base body made of steel can be sintered and fixed with a plurality of grinding blocks at the temperature of 750 DEG C or above, and then the second base body and the first base body made of aluminum are connected and fixed through the fasteners, so that high-temperature diamond sintering is achieved, the overall weight is reduced, manual loading and unloading operation is convenient, fast and safe, damage to a grinding machine spindle is small, and the service life of the grinding machine is prolonged. And the driving power of the grinding machine can be reduced.

The application discloses a wear-resistant copper alloy material and a preparation method thereof, and belongs to the technical field of alloy manufacturing. The wear-resistant copper alloy material comprises a copper-aluminum alloy and a surface coating. The copper-aluminum alloy comprises the following components: electrolytic copper powder, aluminum material, iron powder, manganese powder and graphene / Ni-Fe layered double hydroxide composite. The aluminum material comprises pure aluminum and coconut shell fiber / waste aluminum composite, and the mass ratio of the pure aluminum to the coconut shell fiber / waste aluminum composite is 1:(5-6). The surface coating comprises the following components: lignin-modified MXene / metal organic framework / g-C3N4 composite material, epoxy-modified isocyanate oligomer and silane coupling agent-modified nano-silicon sol. The application solves the problem of internal and external defects caused by waste aluminum in the preparation process of the copper-aluminum alloy.

The application discloses a high-hardness high-strength low-temperature sintering composite ceramic material and a preparation method thereof, and comprises the following raw materials in parts by weight: active silicon-aluminum composite material 35-45 parts, modified manganese-silicon slag 20-25 parts, alpha-alumina micro powder 10-15 parts, sodium feldspar 12-18 parts, wollastonite 8-12 parts, low-temperature composite flux 10-15 parts and water 80-100 parts. The high-hardness high-strength low-temperature sintering composite ceramic material takes the active silicon-aluminum composite material as the raw material, introduces multiple solid waste derived components such as the modified manganese-silicon slag and the low-temperature composite flux in the formula, the components complement each other and have a synergistic effect in the sintering process, so that the ceramic material has high hardness and high bending strength, and the unification of solid waste reduction, resource utilization and ceramic performance improvement is realized.

The invention relates to a method for measuring the thickness of an intermetallic compound of a copper-clad aluminum composite material, and relates to the field of metal material analys.The thickness measuring method comprises the steps that an intermetallic compound sample at the composite interface of a copper-clad aluminum sample is taken, the hardness of the interface is obtained through a nanoindenter, and main constituent compounds of the interface are confirmed through hardness comparison; the method comprises the following steps: cutting a copper-clad aluminum sample to obtain a first sample which contains a composite interface and has a regular shape, testing to obtain the resistance of the first sample, obtaining a first mathematical relationship according to a resistance superposition model, cutting the first sample into a second sample with equal length, and weighing to obtain a second mathematical relationship according to a mass superposition model; and obtaining the thickness of the intermetallic compound according to the two mathematical relationships. According to the method, the characteristic that the electrical property of the intermetallic compound is poor is utilized, the electrical property of the composite material is tested, the electrical property difference between the composite material and pure metal is compared, the proportion of the intermetallic compound is quantitatively given through joint calculation, and the thickness of the intermetallic compound can be rapidly measured.

The invention discloses a copper-aluminum composite electrode terminal structure and a processing method thereof. The copper-aluminum composite electrode terminal structure comprises a bottom plate and a composite column, a penetrating hole penetrating through the bottom plate is formed in the bottom plate, a first step is arranged at the bottom of the bottom plate, the composite column is formed by rolling and compositing copper and aluminum, the bottom end and the top end of the composite column are made of two different materials, the middle of the composite column is a composite interface, and a second step and a third step are arranged on the periphery of the composite column. The bottom end of the composite column is provided with a groove which is formed by extruding towards the top end direction and sinking, bottom end materials are extruded towards the two sides to reduce gaps, the combination stability of the composite column and the bottom plate is improved, and the resistance is reduced. Compared with a traditional electrode terminal, the electrode terminal has the advantages of being high in structural reliability, simple in manufacturing process, low in cost and the like, and particularly has the remarkable advantages of improving the consistency of the manufacturing process of the electrode terminal and reducing the manufacturing cost.

The application relates to the technical field of metal material processing, in particular to a rolling forming process of an aluminum composite plate, which comprises the following steps: S1, surface pretreatment of the aluminum composite plate; S2, accurate clamping and positioning; S3, applying directional pressure and material flow guiding to the aluminum composite plate through a multi-station continuous rolling forming device; S4, multi-pass progressive rolling and local thickening; S5, cooling, shaping, surface finishing and nondestructive testing. The application has the following effects: the multi-station continuous rolling device applies radial and axial pressure, drives directional flow of the material, realizes local accumulation and thickening through multi-pass progressive rolling, realizes the local strengthening effect of on-demand material distribution according to the principle of invariable volume, reduces the waste of the material in the aluminum composite plate processing process, improves the material utilization rate, and reduces the production cost.

The invention provides an iron-pollution-resistant catalytic cracking catalyst and a preparation method thereof, and the iron-pollution-resistant catalytic cracking catalyst comprises the following raw materials: a mesoporous and macroporous material, a zinc-aluminum composite material and a molecular sieve, wherein the mesopore and macropore material comprises kaolin and first zinc salt loaded in pores of the kaolin; the zinc-aluminum composite material is obtained by performing solid-phase ball milling on pseudo-boehmite and second zinc salt. The catalytic cracking catalyst provided by the invention has abundant mesopore and macropore structures and excellent iron resistance.

The utility model relates to the technical field of aluminum composite plate production, in particular to a continuous thermal compounding production line for aluminum composite plate production, which comprises a shell, a heating pipe is fixedly connected to the inner wall of the shell, a first electric heater is mounted in the heating pipe, a heating roller is movably connected to the outer surface of the heating pipe, and a second electric heater is mounted in the heating roller. And the inner wall of the shell is fixedly connected with a placement plate, the placement plate is located below the heating roller, a plurality of heating grooves are formed in the surface of the placement plate, and second electric heaters are installed in the multiple heating grooves. According to the production line, the aluminum alloy plate and the plastic plate can be continuously compounded together.

The present application relates to the field of precision transmission equipment manufacturing technology, and particularly relates to a preparation method of a vacuum low-temperature active brazing inner steel outer aluminum composite needle tooth shell, which comprises the following steps: 1, constructing a three-layer composite structure of a rigid inner sleeve, a filler transition layer and an aluminum outer sleeve; 2, after precise machining and pretreatment of the composite structure, performing high-vacuum three-stage stepwise temperature control low-temperature active brazing in a high-vacuum brazing furnace, grading stress relief annealing and deep cold dimensional stabilization treatment; 3, taking the end face and the center hole of the composite component as a unified precision reference, after overall closed-loop precision machining, using a high-precision coordinate grinding machine to precisely machine the needle tooth mounting hole; 4, strengthening the partitioned surface and performing safety detection. The present application realizes overall innovation from five dimensions of material system, interface structure, brazing process, heat treatment system and precision control route, and completely solves the technical problems of composite loosening, brittle phase cracking, precision loss of control, deformation out of tolerance, interface cavity and brazing defects and the like which have existed in the industry for a long time.

The present application relates to the field of metal matrix composites, and discloses a gradient porous copper-aluminum composite material, a preparation method and application thereof.The gradient porous copper-aluminum composite material comprises an aluminum substrate and a gradient porous copper arranged on one surface of the aluminum substrate; the gradient porous copper is divided into a small-pore copper layer and a large-pore copper layer which are in contact with the aluminum substrate; the transition part of the small-pore copper layer close to the aluminum substrate has a graphene layer deposited on the surface combined with the aluminum substrate and the internal pore surface, and the pores are filled with silver.The present application has the advantages of high thermal conductivity, low interfacial thermal resistance, high strength, lightweight and low cost by designing the gradient pore structure of the porous copper, strengthening the interface with graphene and filling silver glue, and the obtained composite heat dissipation plate material after being combined with the aluminum substrate.

The utility model relates to the technical field of copper-aluminum composite belt production equipment, in particular to a damping device for a copper-aluminum composite belt cleaning line, which comprises a belt material and a base, fixed rollers are arranged at the left end and the right end of the upper surface of the base, a sliding groove is formed in the middle of the upper surface of the base, a sliding block is slidably connected to the inner side face of the sliding groove, a floating roller is rotationally connected to the front side face of the sliding block, a top plate cover plate is installed on the upper end face of the sliding groove, and a spring is arranged between the lower surface of the top plate cover plate and the upper surface of the sliding block. The strip penetrates through the upper end of the outer side face of the fixed roller and the lower end of the outer side face of the floating roller. According to the damping device used on the copper-aluminum composite belt cleaning line, the bearing seats at the two ends of the floating roller can move up and down along the roller frame, the springs are installed between the upper portions of the bearing seats and the glands, belt vibration force acting on the roller can be transmitted to the springs, counter-acting force generated by the springs can act on the belt, vibration of the belt is counteracted, and the service life of the belt is prolonged. And automatic cleaning of the surface of the floating roller can be achieved, and the quality of the strip can be effectively guaranteed.

The invention provides a preparation method of a noble metal catalyst, which comprises the following steps: S1, carrying out hydrothermal treatment, drying and roasting on aluminum oxide to obtain aluminum oxide powder; s2, after titanium salt and zirconium salt are mixed according to a preset proportion, a diluent is added, and a precursor solution is obtained; dipping and mixing the aluminum oxide powder and the precursor solution according to a preset first mass ratio, and then washing, drying and roasting to obtain a titanium-zirconium-aluminum composite carrier; s3, mixing and grinding the titanium-zirconium-aluminum composite carrier, noble metal and an oxygen storage material according to a preset second mass ratio to obtain coating slurry; the noble metal is one or more of platinum, palladium and rhodium; s4, coating a target carrier with the coating slurry, and then drying and roasting to obtain the noble metal catalyst. Therefore, the catalytic efficiency and stability of the noble metal catalyst can be improved.

The application discloses a copper-aluminum composite material and a preparation method and application thereof. The copper-aluminum composite material comprises an aluminum base layer and a copper layer at least combined on one surface of the aluminum base layer, wherein the thickness ratio of the copper layer to the aluminum base layer is 1:(2-10); a transition layer of intermetallic compound diffusion is formed between the copper layer and the aluminum base layer through metallurgical combination; and the room temperature elongation of the copper-aluminum composite material is 6%-10%. The application solves the problems of copper-aluminum interlayer peeling and aluminum layer cracking defects in the stamping and bending forming process due to the intrinsic difference in mechanical properties such as hardness, elastic modulus and elongation of copper and aluminum heterogeneous metals.

The present application relates to radiator technical field, specifically to a kind of multi-channel partition temperature control intelligent radiator, including two main pipes and plug at the end of main pipe, multiple copper-aluminum composite radiating fins, copper pipe is inserted in the copper-aluminum composite radiating fin, further comprising: the top of the copper-aluminum composite radiating fin is equipped with air outlet top cover, air outlet top cover has a certain opening angle door, forms air outlet that exhausts outward;The bottom of the copper-aluminum composite radiating fin is equipped with air inlet bottom cover, air inlet bottom cover has a certain opening angle door, by up and down openable and closable movable door one and movable door two, can let copper-aluminum composite radiating fin inside form air flow channel, when temperature rises, utilize the characteristics of high-temperature air to flow upwards, drive copper-aluminum composite radiating fin inside air flow, utilize top inclined plane and bottom inclined plane, guarantee top air outlet flow smoothly, increase bottom air inlet area, cooperate gasket and side plate reduce external weak air flow interference, enhance chimney effect.

The application discloses a kind of FPC temperature acquisition structures, including the temperature acquisition component of connecting aluminum-based FPC, temperature acquisition component includes integrally injection-molded temperature acquisition shell and conductor structure, temperature acquisition shell includes temperature acquisition part with temperature sensor and positioning part with connecting window, conductor structure is formed by copper material connecting piece and aluminum material connecting piece composite Copper material connecting piece is extended to temperature acquisition part and connected with temperature sensor, and aluminum material connecting piece is welded with aluminum-based FPC at connecting window position, the combination of same metal is better, welding strength is high and contact area is large, improve electrical contact performance, so that temperature information collected by temperature sensor can be reliably transmitted to FPC product, this conductor structure is designed using copper-aluminum composite structure, with high bonding strength, excellent conductivity and thermal conductivity, easy to weld, low contact resistance characteristics, can meet the welding requirements of conductor structure and aluminum-based FPC, also can reduce production cost, improve product performance.

The utility model relates to the technical field of honeycomb plates, and particularly discloses an SPC (Smith Poly Carbonate) foamed aluminum composite plate which comprises an aluminum honeycomb core layer, spc plates are arranged on the upper side and the lower side of the aluminum honeycomb core layer, a plurality of honeycomb holes are formed in the aluminum honeycomb core layer, and foamed aluminum powder layers are filled in the honeycomb holes. According to the SPC foamed aluminum composite board, a plurality of honeycomb holes are filled with foamed aluminum powder, so that the foamed aluminum powder is foamed in honeycombs to form foamed aluminum powder layers in the hot press molding process of the honeycomb board, the side walls are supported in the honeycombs, the compressive strength of the side walls of the honeycombs is improved, and the service life of the SPC foamed aluminum composite board is prolonged. The side face of the cellular board is prevented from being easily crushed or deformed, and the quality of the cellular board is improved.

The application provides a mixed powder for foamed aluminum, a foamed aluminum composite material and a preparation method thereof, the mixed powder comprising a base material, a foaming agent and a brazing agent; the base material comprises aluminum elements, silicon elements and copper elements; the copper elements exist in the form of copper powder; the difference between the solidus temperature of the brazing agent and the hot rolling temperature is-30 DEG C to 30 DEG C, and the mass percentage of the brazing agent is greater than or equal to 0.2wt% based on the mixed powder. For the foamed aluminum alloy system with Cu as a secondary main alloy element, the application can directly foam without diffusion annealing, and uniform and small pores are obtained, so the application prospect is wide.

The utility model discloses a copper-aluminum composite pipeline connecting structure which comprises a main body section, the two sides of the main body section are each fixedly connected with a connecting assembly, the connecting assemblies are in external threaded connection with a pipeline, the connecting assemblies are sleeved with belleville spring washers, the connecting assemblies are in external threaded connection with hexagon nuts, and the hexagon nuts are sleeved with belleville spring washers. The belleville spring washer is located between the pipeline and the hexagon nut, and the hexagon nut is tightened to extrude the belleville spring washer to abut against the pipeline. According to the utility model, the belleville spring washer is extruded by the hexagonal nut to abut against the pipeline, and under the action of the elastic force of the belleville spring washer, the threaded connection of the pipeline and the threaded connection of the hexagonal nut are extruded, so that the threaded connection has a certain degree of self-locking performance, and the sealing performance between the pipeline and a connecting assembly is enhanced.

The invention relates to the technical field of energetic materials, in particular to nickel fluoride catalyzed ammonium perchlorate / aluminum composite fuel and a preparation method and application thereof. The ammonium perchlorate / aluminum composite fuel consists of the following components in percentage by mass: 50-70% of ammonium perchlorate, 0-10% of nickel fluoride and the balance of aluminum powder. Due to the addition of NiF2, high and low decomposition peaks of AP are combined into a violent exothermic peak, and the temperature of the high-temperature decomposition peak is reduced by about 30 DEG C, which means that the burning rate of the propellant can be greatly improved; the heat effect of the fluorination reaction (55.98 kJ. G <-1 >) of aluminum is far higher than the heat effect of the oxidation reaction (31.05 kJ. G <-1 >) of aluminum, so that the explosion heat is improved by about 10% while the reaction path is optimized. Besides, the anhydrous NiF2 used in the formula is stable in physical and chemical properties and does not absorb moisture and deliquesce, the problem of long-term storage of common fluorides such as CuF2 and FeF3 is solved, and the product reliability is extremely high.

This invention discloses a paint remover for steel-aluminum composite materials, belonging to the field of metal material surface treatment technology. It comprises the following components in weight percentages: 5%-8% alkaline substance; 5%-10% lipase component; 10%-16% solvent; 5%-10% surfactant; 6%-13% co-solvent; 5%-8% corrosion inhibitor; and water as the balance. The paint remover is prepared from alkaline substance, lipase component, solvent, surfactant, co-solvent, corrosion inhibitor, and water. It is used for removing paint from steel-aluminum composite materials. On one hand, the alkaline substance saponifies some groups in the paint, dissolving them in the solvent and water. On the other hand, heating and steaming the paint film reduces its strength and adhesion to the metal. Then, utilizing the wetting, penetration, and affinity effects of the surfactant, the catalytic effect of the lipase component, and the protective effect of the corrosion inhibitor on the steel-aluminum substrate, the goal of removing paint quickly without corroding the substrate is achieved.