109results about How to "The interface is tightly combined" patented technology

The invention discloses a preparation method for a Ti3Al-TiAl laminated composite material, relating to a preparation method for a metal laminated composite material and aiming at solving the problems of high requirement on equipment and complex process in a traditional preparation method. The preparation method for the laminated composite material comprises the following steps of: placing a Ti foil and an Al foil which are alternatively arranged in a stacking way into a vacuum hot press sintering furnace and heating to 300-500DEG C and simultaneously pressurizing; and secondly, unloading the pressure, heating the stacked foils to 600-800DEG C and maintaining the temperature, then heating the foils to 900-1300DEG C, simultaneously applying the pressure of 10-30MPa, maintaining the pressure and then cooling along with the furnace and withdrawing the die to obtain the Ti3Al-TiAl laminated composite material. According to the preparation method disclosed by the invention, the preparation of the laminated composite material can be finished at a time; a production process is simple and feasible; the requirement on the equipment is low; and the obtained laminated composite material is compact in interface bonding and is applied to aerospace turbine engine vanes, aerofoils and members of engines of high-grade cars.

The invention provides a method for pretreating a copper insert before casting the copper insert of a copper-insert terminal of a lead-acid storage battery in a bus bar lead alloy bush seat, which comprises the following steps: (1) cleaning the surface of the copper insert; (2) tinning the copper insert; (3) preheating the copper insert; and (4) immersing the copper insert in molten lead alloy for a moment, taking the copper insert out, swinging the copper insert to remove lead alloy not firmly adhered to the surface of the lead alloy, immediately placing the copper insert into a cavity of a lead alloy bush seat of a bus bar casting mold, and casting lead alloy. In the pretreatment method, the copper insert casting process can make the joint of the interfaces of the copper insert and the bus bar lead alloy bush seat tight enough to greatly reduce slight leakage around the copper insert during use and prolong the service life of the battery to a maximum degree. The pretreatment method is simple in step and easy in operation, well solves critical problems in battery manufacturing and using industries, and has a great realistic significance.

The invention discloses an Al4C3 modified Al-based composite and a preparation method thereof. The Al4C3 modified Al-based composite is prepared through the following method. The method comprises the steps that (1) oxidized graphene is prepared; (2) then pure aluminum powder is frozen at a low temperature to be kept for a period of time; (3) after the aluminum powder and a certain amount of graphene are mixed, a high-energy ball grinder is utilized for carrying out ball grinding on the above mixed frozen aluminum powder; (4) ball grinding is carried out after the aluminum powder and a certain amount of graphene are mixed, meanwhile, a small amount of Al4C3 powder is added gradually, and graphene coated aluminum powder interface bonding is further enhanced; (5) prepared graphene coated aluminum mixed powder is formed at certain pressure, and pressure maintaining is carried out under the pressing pressure; and (6) a blank obtained after cold pressing forming is put into heating equipment with inert gas shielding to be sintered, and finally the graphene coated aluminum-based composite excellent in comprehensive performance is prepared. The Al4C3 modified Al-based composite can be conveniently applied and popularized to the electronic industry.

The invention discloses a graphene modified silicone rubber cable sheath material. The material is prepared from raw materials as follows: phenyl siloxane rubber, methyl vinyl silicone rubber, fluororubber, polybutadiene rubber, polyurethane, ethylene-acrylate rubber, zinc oxide, stearic acid, 2,4-dichlorobenzoyl peroxide, an assistant crosslinker TAIC, 2,5-dimethyl-2,5-di(tert-butylperoxy)hexane, cerium oxide, fumed silica, carbon black, nano calcium carbonate, stearic acid modified magnesium hydroxide, ammonium polyphosphate, modified graphene oxide, nano silicon carbide, magnesium stearate, triphenyl phosphate, tributyl citrate, an accelerator, an anti-aging agent and silane modified cellulose. The graphene modified silicone rubber cable sheath material is high in strength, excellent in heat resistance and flame retardation, good in aging resistance and long in service life.

The invention relates to a method for producing diffusion couple with powders including the following steps: (1) powder material A is filled in a metal casing which do not diffuse or react with the contacted powder and then is pressed to form a compact; (2) the compact is punched by a die with a diameter which is 4-6 mm smaller than the inner diameter of the metal casing; (3) another powder material B is filled in the holes and then treated by compaction, sintering at a certain temperature, air-cooling to get a diffusion couple. The ring canning diffusion couple produced by compacting powder in the invention utilizes the high shrinkage of the outer powder in the sintering process to provide a interfacial binding force to the powder material of each layer in the jacket, thereby guaranteeing a full integration of the powder in each layer and providing a possibility to the preparation and the interface study of the layered composite powder materials.

The invention discloses a fast connection method of a carbon/carbon composite material. The method includes the steps of: (1) preparation of an X-Si (X=Ni, Co, Ti or Cr) alloy paste; (2) pretreatment of the carbon/carbon composite material; (3) pretreatment of a middle layer metal sheet (including Mo or Ti sheet); (4) coating of a composite material connection surface with the X-Si alloy paste; and (5) assembling and quick connection: arranging two X-Si alloy coatings and one middle layer metal sheet in the middle of the connection surface of two carbon/carbon composite components so as to form an X-Si/middle layer metal sheet/X-Si sandwich structure, with the Si atomic percentage content of the X-Si alloy being 40-80%, under the conditions of 10-40MPa pressure assembling, vacuum protection and a heating rate of 100-300DEG C/min, conducting heating to 1200-1600DEG C, and performing heat preservation for 1-10min. The method disclosed in the invention can realize liquid phase connection of carbon/carbon composite materials. The process is simple, and the prepared connecting piece has a reliable structure and can be used in load bearing and high temperature application occasions.

The invention provides a method for preparing a cobaltous oxide/graphene nanometer composite material, which comprises the steps of performing ultrasonic processing on graphite oxide in deionized water for obtaining graphene oxide solution, dissolving Co(NO3)2.6H2O into the deionized water for obtaining cobaltous nitrate solution, then dripping NH3.H2O, dispersing a generated solid product in the deionized water for preparing cobalt hydroxide colloidal solution; mixing the cobaltous nitrate solution with the cobalt hydroxide colloidal solution, performing washing and drying; and processing at the temperature of 150-500 DEG C for obtaining the cobaltous oxide/graphene nanometer composite material. The method for preparing the cobaltous oxide/graphene nanometer composite material has advantages of simple operation, high speed, large-scale production, and environment-friendly effect.

The invention discloses a high-temperature-resistant high-fire-retardant silicone tube which is extruded from a silicone rubber composite material. The silicone rubber composite material comprises the following raw materials: methyl vinyl silicone rubber, methyl vinyl phenyl polysiloxane rubber, ethylene-propylene-diene rubber, cis-polybutadiene rubber, polyurethane, an ethylene-octene copolymer, zinc oxide, stearic acid, 2,5-dimethyl-2,5-di(t-butyl peroxy)hexane, methyltris(methylethylketoxime)silane, triallyl cyanurate, composite pigments and fillers, a catalyst, one or more antioxidants, tricresyl phosphate and melamine resin, wherein the composite pigments and fillers are obtained by mixing cerium oxide, aluminum hydroxide, magnesium hydroxide, micro-capsulated red phosphorus, nanometer calcium carbonate, iron oxide, diatomite, silicon carbide, trichlorovinylsilane, hexamethylcyclotrisilazane, divinyl tetramethyl disiloxane and an imidazolium ionic liquid. The silicone tube provided by the invention is high in strength, high-temperature resistance and aging resistance, excellent in fire-retardant property, and long in service life.

A method for preparing a graphene-based nickel oxide nanocomposite is disclosed. The method comprises steps of: performing ultrasonic processing on graphite oxide in deionized water to obtain a graphene oxide solution; dissolving nickel nitrate into the deionized water, dropwise adding NH3.H20 until the pH of the solution reaching 8-10, stirring, standing and suction filtrating to obtain nickel hydroxide sediment; adding the nickel hydroxide sediment into the deionized water and performing ultrasonic processing to obtain a nickel hydroxide colloidal solution; mixing and stirring the graphene oxide solution and the nickel hydroxide colloidal solution, standing, suction filtrating, and then drying and grinding to obtain powdery graphene-based nickel oxide nanocomposite, calcining the powdery graphene-based nickel oxide nanocomposite in an inert atmosphere to obtain the graphene-based nickel oxide nanocomposite. The method has the advantages of simple preparation method, lower cost, environment friendliness and suitability for mass-scale production.

The invention relates to a low-temperature-resistant and abrasion-resistant polyurethane coating and a preparation method thereof. The low-temperature-resistant and abrasion-resistant polyurethane coating is prepared from, by weight, 45-60 parts of polyurethane matrix resin, 0.5-6 parts of low-temperature polyester polyols, 3-20 parts of surface modifier modified micron powder, 5-12 parts of curing agents, 30-50 parts of solvent and 0.5-3 parts of defoamer. The low-temperature-resistant performance of the obtained polyurethane coating can be excellent by adding the low-temperature-resistant polyurethane matrix resin on the basis that the strong adhesion, excellent room-temperature mechanical performance, good stability and other characteristics of original polyurethane coatings are retained, the hardness of the coating is improved by adding the micron powder, and accordingly the coating has excellent abrasion-resistant performance. The coating can be used for protection of aircraft, wind turbine blades and other facilities in a low-temperature environment.

The invention discloses a fuel element and a preparation method and application thereof. The fuel element is a ball and sequentially comprises a fuel-free layer, a fuel layer and a shell layer from inside to outside, and the fuel-free layer, the fuel layer and the shell layer are concentric. The fuel-free layer is spherical phenolic-resin-based foam carbon with the volume density being 0.5-1.2 g/cm<3> and the compressive strength being 40-90 MPa. Grooves are formed in the surface of the phenolic-resin-based foam carbon. The fuel element is adjustable in volume density, the volume density is lower when design parameters are the same, the heavy metal loading capacity is higher when volume densities are the same, interfaces between the fuel-free layer and the fuel layer are closely combined, the fuel element has the advantages that the shell layer is compact in structure and molten salt infiltration can be prevented, the fuel element can be used in a reactor, and the preparation method is simple and low in cost.

The invention discloses a carborane ceramic precursor system and a preparation method and application thereof. Particularly, 1, 1'-silicon alkyl methylene-2, 2'-bis(silicon dimethyl) biscarborane is used as a reaction raw material, and 1, 1'-silicon alkyl methylene-2, 2'-bis(hydroxyl silicon dimethyl) biscarborane is prepared; triethylene trimethyl ring trisilazane is used as an initial raw material and reacted with dimethyl chlorosilane to obtain 1, 3, 5-trimethyl-1, 3, 5-tri[(i)beta(/i)-( dimethyl chlorine silicon) ethyl] cyclotrisiloxane is obtained; then the novel carborane ceramic precursor is prepared. The precursor takes cyclo-silazane as a framework support, and is provided with a cross-linked network structure; thus the precursor has very good ceramic yield in further crosslinking process; therefore, a compact ceramic coating can be formed on the surface of the carbon fiber. The preparation method has the advantages of simple preparation technique, mild reaction condition, and easily-obtained raw materials; the carborane ceramic precursor system is applicable to the industrial amplifying production. The heat resistance and the oxidization resistance of the carbon fiber after coating treatment are very excellent.

The invention relates to a steel-based composite and a preparation method and a preparation device thereof, and belongs to the technical field of steel-based composites. The steel-based composite comprises a steel base and reinforced composite columns parallelly arranged in the steel base, and is prepared by processes of pressing, sintering, pouring, condensing and the like. The preparation device of the steel-based composite comprises a mould base, a composite mould casing and a pressing head, wherein the composite mould casing is in the shape of a hollow cylinder with the lower end connected with the mould base and consists of a low-heat-conduction ceramic layer and hot-work die steel, the low-heat-conduction ceramic layer is packaged by the hot-work die steel on the periphery, the pressing head is disposed inside the composite mould casing and capable of moving freely along the inner wall, and the size of the pressing head is matched with the inner diameter of the composite mould casing. The steel-based composite has excellent bearing capacity and wear resistance. The preparation method is easy in processing, short in production cycle and facilitates mechanical batch production. The preparation device is reusable, and accordingly production cost is reduced.

The invention discloses a preparation method of a polypyrrole/metal-modified Sn3O4 nano composite photocatalytic material. The nano composite material is a composite photocatalyst material obtained byloading and dispersing metal-modified Sn3O4 semiconductor heterojunction on polypyrrole in a chemical bond complexing form; and the metal-modified Sn3O4 is obtained by separately loading metal nano particles of a single-component metal or multi-component alloy of Pt, Au, Ag, Cu and the like having a plasma resonant effect onto Sn3O4. The photo-induced electron-hole separation rate in the photocatalytic reaction can be sufficiently improved by utilizing the visible light photocatalytic oxidation and reduction characteristics of Sn3O4, the plasma resonant effect of metal nano particles, photo conduction and conductivity of polypyrrole as well as the chemical bond heterojunction structure among different components, so that the performance for degrading pollutants in a photocatalytic oxidation and reduction manner and generating hydrogen by photocatalytic and decomposition of water can be improved. The easy-to-mold characteristic of polypyrrole can effectively avoid the recycling difficulty of the powder material.

The invention discloses an ultrathin composite solid-state electrolyte membrane and a preparation method thereof. The ultrathin composite solid-state electrolyte membrane is a membrane formed by compounding an inorganic solid-state electrolyte filler and a polymer matrix. According to the invention, an adhesive is introduced into a composite system, and the membrane material of the composite solid-state electrolyte is prepared on the substrate attached with the silicone oil on the surface by adopting the tape casting method, and has the advantages of easiness in demolding, extremely small thickness, uniform and compact components, flat and smooth surface and the like. The electrochemical performance is better, and particularly, the ionic conductivity of the membrane is obviously improved. Meanwhile, the inorganic filler and the polymer matrix are tightly combined by the adhesive, so that the mechanical property of the film is remarkably improved, the growth of dendritic crystals can be effectively inhibited, and the safety of a solid-state battery is ensured.

The invention relates to a method for electrodepositing iron-nickel alloy plating on the surface of a carbon-based material and belongs to the technical field of surface treatment. The carbon-based material is subjected to heat treatment and ultrasonically cleaned, and thus a pretreated carbon-based material is obtained; an iron-nickel alloy electrodepositing solution is prepared; with the pretreated carbon-based material as a cathode, an iron-nickel alloy plate as an anode and the iron-nickel alloy electrodepositing solution serves as an electroplating solution, electrodepositing is conductedat 30-50 DEG C for 5-60 min through a direct-current power source; and the cathode is taken out, cleaned and dried, and thus the iron-nickel alloy plating is obtained. The iron-nickel alloy plating can be electroplated on the surface of the carbon-based material, the thermal expansion coefficient of the plating is close to that of the carbon-based material, micron-scale interface bonding is achieved between the plating and the carbon-based material, and tight interface bonding can be still kept after a heat cycle from the indoor temperature to the temperature of 800 DEG C.

The invention relates to a preparation method of an Au modified SnO/Sn3O4/SnO2 nano composite photocatalytic material. The nano composite material is obtained by placing chloroauric acid and a tin source into a solvent, a surfactant and a reducing agent and forming chemical bond complexing among composite ingredients of the materials according to an ice salt bath and solvent combined hot wet chemical in-situ synthesis method. The composite material prepared by the invention utilizes a plasma resonance effect of Au metal nanoparticles, an excellent energy level matching heterojunction structureamong composite components of a tin oxide material and excellent electron conduction of Au metal nanoparticles, and implements rapid electron-hole separation in the process of cooperating photocatalytic oxidation and reduction degradation of pollutants with photocatalytic water splitting hydrogen production, thereby improving efficiency of photocatalytic water splitting and photocatalytic rhodamine B degradation of the Au modified SnO/Sn3O4/SnO2 nano composite photocatalytic material.

The invention relates to a brazing alloy, pertaining to the technical field of welding. The brazing alloy comprises the following components by the weight percentage: 40-80% of Ti, 10-35% of Cu, 5-20% of Ni and 5-15% of Cr. The brazing alloy of the invention can be coated at the joint of braze welding of Ti3Al-base alloy and GH536 alloy; braze welding is carried out under vacuum condition; after the braze welding, the brazing alloy is used for filling the clearance at the joint of braze welding so as to mould the brazing seam excellently and control the quality of the braze welding to be excellent and steady. The interface connecting parent material and the brazing alloy is tightly integrated that no defect, such as pore and crack, exists; therefore, the interface is excellently organized.

The invention discloses a bimetallic wear-resisting lining plate and a preparation method thereof and belongs to the technical field of metal material casting. The bimetallic wear-resisting lining plate comprises a matrix layer and a wear-resisting layer, wherein the wear-resisting layer is provided with more than two T-type projections inlaid into the matrix layer, the height ratio of every T-type projection to the wear-resisting layer is 1:1.2-1:2, the height ratio of the wear-resisting layer to the matrix layer is 1:1-1:3, the width ratio of every T-type projection to the lining plate is 1:8-1:15, the wear-resisting layer and the T-type projections are made of medium-carbon low-alloy silicon-manganese steel, the matrix layer is made of low-alloy carbon steel, and the bimetallic wear-resisting lining plate is prepared through compounding, smelting, casting, annealing and isothermal quenching. The bimetallic wear-resisting lining plate and the preparation method thereof have the advantages that through adoption of reasonable structural design and a layered casting technology, combination of a composite layer at an interface is closer, and the composite layer is less prone to separation; produced through the thermal treatment technology of simple isothermal quenching, the bimetallic wear-resisting lining plate is highly resistant to wear, high in tenacity, simple in preparation technology and convenient to produce, and production cost can be reduced effectively.

The invention discloses a preparation method of a carbon-nanotube-reinforced magnesium-based composite material and relates to a non-metal fiber-containing alloy characterized by a matrix material. According to the method, nanometer-sized magnesium particles are synthesized on the surface of a carbon nanotube in situ so as to obtain a magnesium-coated carbon nanotube composite powder; and then themagnesium-coated carbon nanotube composite powder is subjected to an ultrasonic extrusion casting process to form the carbon-nanotube-reinforced magnesium-based composite material. The defects of a method for preparing the carbon-nanotube-reinforced magnesium-based composite material in the prior art that the carbon nanotube agglomeration results in uneven dispersion of the carbon nanotube in a magnesium matrix, the preparation process results in structural damage of the carbon nanotube, consequently, the reinforcing effect is reduced, different degrees of oxidation of the magnesium matrix are difficult to avoid, the carbon nanotube and magnesium interface in the composite material has poor wettability, and only weak interface bonding is formed, so that the carbon-nanotube-reinforced magnesium-based composite material has poor comprehensive mechanical properties are overcome.