108 results about "Aluminium carbide" patented technology

The invention discloses a multiple dispersion strengthening copper-base composite material produced in situ and a preparation method thereof; the reinforced phase comprises at least three of the following substances: titanium carbide, zirconium carbide, alumina, titanium boride, aluminum carbide, chromium oxide, zirconia, graphite and copper; wherein, the contents of titanium carbide, zirconium carbide, alumina, titanium boride, chromium oxide and zirconia are not less than 0.3% and not more than 5%, the content of aluminum carbide is not less than 0.1% and not more than 5%, the content of graphite is not less than 0.1% and not more than 1% and the balance is copper. The particle size of the reinforced phase is between 10nm to 10mu m. The preparation method adopts ball milling; pressing, sintering and squeezing processes and the technological parameters are optimized and controlled properly to obtain the multiple dispersion strengthening copper-base composite material. Because the in situ self-generation technology is adopted and various reinforced phase methods are combined, the material of the invention has higher high-temperature strength and better electroconductibility and anti-creep property compared with the traditional ceramic particle strengthening copper-base composite material.

The invention discloses a magnesium alloy refiner and a preparation method thereof, and relates to a grain refiner and a preparation method thereof. The method solves the problems that an overheating treatment method of the existing magnesium alloy refining method has strict condition requirement, the oxidation burning loss of magnesium is serous, a carbon-containing material treatment method has high temperature and produces harmful gases such as Cl2, HCl and the like, a ferric chloride method reduces the corrosion resistance of the magnesium alloy, an alloying method has high cost, a granular graphite or aluminium carbide granule method is easy to produce segregation on the grain boundary and a Zr element method has narrow application range. The magnesium alloy refiner is prepared from a calcium metal and a primary magnesium ingot. The preparation method comprises the following steps: heating and melting the primary magnesium ingot under atmospheric protection, then adding the calcium metal into the melted primary magnesium ingot, dissolving the calcium metal and stirring the mixture uniformly, and casting the mixture to form the magnesium alloy refiner. The magnesium alloy refiner has no burning loss, does not produce the harmful gases, has no influence on the corrosion resistance of the magnesium alloy, has low cost, is uniformly distributed in the alloy, can improve the mechanical property of the alloy, and is used for refining the magnesium alloy.

The invention discloses a titanium aluminium carbide powder and synthesis method using tin as reactive adjuvant characterized in that, using titanium (Ti), aluminium (Al) and graphite (C) as raw material, using stannum (Sn) as reaction adjuvant, proportioning by the mol ratio of Ti : Al : C : Sn = 3.0 : 1.0 : (1.8-2.0) : (0.1-0.2), mixing 2-6 hours through ball grinding, drying at 60-70 deg. C in baking oven, briquetting the dried mixture under 10-20MPa, loading into high temperature furnace, argon shielding, elevating the temperature to 1300-1550 deg. C. at the speed of 20-40 deg. C per minutes, heat preserving for 5-10 minutes, cooling with the speed of 10-15 deg. C/min.

A polycrystalline cubic boron nitride compact which comprises greater than 75 volume % and not greater than 90 volume % cubic boron nitride particles, the cubic boron nitride particles comprising particles of at least two average particle sizes, and a binder phase constituting the balance of the compact and comprising at least one titanium compound selected from titanium boride, titanium nitride, titanium carbide and titanium carbonitride and at least one aluminium compound selected from aluminium oxide, aluminium boride, aluminium nitride, aluminium carbide and aluminium carbonitride.

The invention discloses a preparation method of carbon nanotube composite materials, and belongs to the field of development of metal matrix composite materials. The preparation method comprises the following steps that after carbon nanotube powder and aluminite powder are mixed, ball milling is carried out, the ball milling time is 10h to 30h, and composite powder containing Al4C3 is obtained; after the carbon nanotube and the composite powder are mixed, ball milling is carried out, the ball milling time is 2h to 10h, and then the carbon nanotube and the composite powder are dispersed evenlyto obtain CNTs-Al4C3/Al composite powder; and the CNTs-Al4C3/Al composite powder is subjected to cold press molding at room temperature, and is subjected to sintering in argon environment to obtain asintering blank of CNTs-Al4C3/Al composite materials, and the sintering blank is subjected to hot extrusion to obtain the CNTs-Al4C3/Al composite materials. According to the preparation method of thecarbon nanotube composite materials, nano-aluminium carbide formed in-situ is combined with aluminium matrix well to play cooperative and reinforced actions on the composite materials with CNTs; and the the preparation method of novel aluminum matrix composite materials has good synthesized mechanical properties.

The invention discloses a cable sheath material containing modified PVC resins and preparation method thereof, and the cable sheath material is composed of following raw materials: modified PVC resins, polyacrylate, nanometer potter clay, sodium silicate, aluminium carbide, vulcanizing agent VA-7, antioxidant TPPD, phenyl triethoxysilane, dibenzyl thiourea, anti-oxidant DLTP, di(2-Ethylhexyl)-4,5-epoxycyclohexane-1,2-dicarboxylate and triphenylphosphine oxide; The invention employs modified PVC resin as main material, and the PVC resin is modified, and the invention has the advantages of greatly improved mechanical property, better mechanical properties, low smoke, halogen free, flame retardation, high mechanical strength and high insulation resistor, and nanometer potter clay in the raw material is used as strengthening agent, and sodium silicate and aluminium carbide are used as filling material.

The invention discloses a composite hard alloy material and a preparation method thereof. The composite hard alloy material is prepared from the following components in parts by weight: 35-40 parts of nano titanium carbide, 5-15 parts of nano titanium nitride, 7-9 parts of tungsten carbide, 5-8 parts of niobium carbide, 3-7 parts of silicon carbide, 3-5 parts of cobalt powder, 1-3 parts of yttrium oxide, 1-3 parts of aluminium carbide and 1-5 parts of titanium powder. The composite hard alloy material has high strength, good toughness and good wear resistance and thermal shock resistance.

The invention discloses a tungsten carbide coated composite hard alloy material and a preparation method thereof. The alloy material comprises a matrix and a tungsten carbide coated layer, wherein the matrix is prepared from the following components in parts by weight: 35-40 parts of nano titanium carbide, 5-15 parts of nano titanium nitride, 5-8 parts of niobium carbide, 3-7 parts of silicon carbide, 3-5 parts of cobalt powder, 1-3 parts of yttrium oxide, 1-3 parts of aluminium carbide and 1-5 parts of titanium powder. The composite hard alloy material has high strength, good toughness and good wear resistance and thermal shock resistance.

This invention relates to a synthetic method of aluminium carbide titanium ceramic powder. The invention takes TiH2 powder, Al powder and TiC powder as raw material, add Sn as accessory ingredient, dyr mix the raw materials acoording to mol ratio of TiH2:TiC:Al:Sn=1:1:1:0.1 for 10 hours, execute piece under 30 to 50 pressure, then put at high temperature furnace, under vacuum atmosphere rise the furnace temperature to 1350 to 1550 deg by rate of 15 to 40 deg per minute, holding time for 5 to 15min, execute low cost high-purity Ti3AlC2 powder.

The invention discloses a cable sheath material containing modified high density polyethylane and preparation method thereof, and the cable sheath material comprises the following raw materials: modified high density polyethylene, methyl vinyl silicone rubber, nanometer attapulgite, nanometer level titanium dioxide, aluminium carbide, isocyanate, anti-scorching agent CTP, titanate coupling agent TMC-TTS, isooctyl mercaptoacetate, 2.6-di t butyl-4-methyl phenol, chlorinated paraffin and polyurethane TPU; the invention employs modified high density polyethylane as main material, and the terpolymer EP rubber is modified, thereby the product has the characteristics of low-smoke, halogen free, flame retardation, high mechanical strength, high insulation resistor and high mechanical property, simultaneously the nanometer attapulgite in the raw material is used as strengthening agent, and nanometer level titanium dioxide and aluminium carbide are used as filling materials.

The invention belongs to the field of metal materials, and particularly relates to an aluminum oxide layer cladding type nanometer aluminum carbide particle reinforced aluminum matrix composite material and a manufacturing method of the aluminum oxide layer cladding type nanometer aluminum carbide particle reinforced aluminum matrix composite material. The aluminum oxide layer cladding type nanometer aluminum carbide particle reinforced aluminum matrix composite material is characterized in that according to the mass percentage of various chemical components, the mass percentage of aluminum ranges from 65% to 99.5%, the mass percentage of carbon ranges from 0.5% to 15.0%, and the balance is at least one of the magnesium element, the copper element, the silicon element, the zinc element, the ferrum element, the manganese element, the chromium element and the titanium element. Aluminum oxide cladding type nanometer aluminum carbide particles which are formed in an in-situ synthesis modeare distributed on an aluminum or aluminum alloy matrix. The manufacturing method of the aluminum oxide layer cladding type nanometer aluminum carbide particle reinforced aluminum matrix composite material comprises the steps that raw materials are prepared in proportion, and graphite powder and activated carbon are subjected to vacuum drying, and then are mixed and reserved; and commercial purityaluminum and at least one of magnesium, copper, silicon, zinc, ferrum, manganese, chromium and titanium are molten in a smelting furnace, after the temperature is stabilized, the mixed powder of thegraphite powder and the activated carbon are uniformly blown to the molten body in the argon atmosphere by a rotary blowing device, then the temperature is rapidly reduced until solidification is achieved, the materials are transferred to a resistance furnace to conduct a liquid-solid reaction, and therefore the nanometer aluminum carbide particle reinforced aluminum matrix composite material is obtained. The manufacturing method is low in cost, is green and environmentally friendly, and has the good industrial production prospect.

A process for preparing the sosoloid powder of tungst aluminium carbide by high-temp solid-phase reaction includes such steps as proportionally mixing W1-xAlx alloy with high-purity carbon powder, ball grinding, loading in graphite, crucible, heating to 1300-1600 deg.C in vacuum reductive atmosphere, or inertial at mosphere in solid-phase reactor, and holding the temp for 10-120 hr while ball grinding for 30-60 min at 5-10 hr of intervals. Its advantages are good crystal state, less impurity pollution, short time, and no noise.

The invention discloses a modified terpolymer EP rubber containing cable sheath material and preparation method thereof, and the product comprises the following raw materials: modified terpolymer EP rubber, hydrogenated butadiene-acrylonitrile rubber, blast furnace slag, zeolite molecular sieve, aluminium carbide, promoter 808, promoter CZ, N-(beta-aminoethyl)-gamma-aminopropyl trimethoxysilane (triethoxysilane), barium ricinoleic acid, anti-oxidant 1010, diisobutyl phthalate and phosphate ester; the invention employs modified terpolymer EP rubber as main material, and the terpolymer EP rubber is modified, thereby the product has the characteristics of low-smoke, halogen free, flame retardation, high mechanical strength and high insulation resistor, moreover, the product has good elasticity and flexibility, simultaneously the nanometer attapulgite in the raw material is used as strengthening agent, and nanometer level titanium dioxide and aluminium carbide are used as filling materials.

The invention relates to a method for preparing aluminum carbide from aluminum oxide, which comprises the steps of: mixing industrial pure aluminum oxide as a raw material with graphite as a reducing agent; then putting the mixture at a pressure of 1-200 Pa; heating the mixture to 1450-1600 DEG C for 60-120 min; then keeping the heat for 30-120 min; and cooling the mixture to obtain the aluminum carbide, wherein purity of the aluminum carbide is more than 90% and up to 96.38%. The method disclosed by the invention is finished in a vacuum environment; the obtained aluminum carbide is pure and free from impurities; and gas generated from reaction is controlled easily. As the aluminum oxide and the graphite carbon are adopted as reactive materials, the reactive materials are obtained easily and low in cost. The method for preparing aluminum carbide from aluminum oxide disclosed by the invention is short in aluminum carbide preparation technological process, clean, free from pollution, as well as simple and convenient in operation.

The invention discloses a light tough bicycle frame material and a preparation method thereof. The bicycle frame material is prepared from the following materials in parts by weight: 12-26 parts of nano aluminium carbide, 12-28 parts of carbon fiber, 8-25 parts of nano silica, 9-18 parts of polycarbonate, 7-16 parts of polyamide, 8-20 parts of boron fiber, 18-40 parts of carbon steel fiber, 6-19 parts of polystyrene, 6-14 parts of hexamethylene diisocyanate and 7-14 parts of polyetheretherketone fiber. Compared with the prior art, the bicycle frame material provided by the invention has the advantages that (1), the bicycle frame material is light, high in toughness and long in service life; (2), the bicycle frame material is low in production cost and inexpensive.

The invention discloses a ceramic brake block, which consists of the following ingredients in the following parts: 20 to 30 parts of alumina silicate fiber, 30 to 50 parts of glass fiber, 40 to 50 parts of carbon fiber, 30 to 35 parts of bamboo charcoal fiber, 50 to 80 parts of ceramic fiber, 20 to 25 parts of asbestos fiber, 30 to 40 parts of polyester fiber, 40 to 45 parts of polyacrylonitrile fiber, 20 to 25 parts of polyvinyl alcohol fiber, 10 to 15 parts of polypropylene fiber, 15 to 25 parts of ultra to high molecular weight polyethylene fiber, 10 to 15 parts of sepiolite fiber, 20 to 25 parts of fibrilia, 15 to 18 parts of viscose, 5 to 10 parts of hollow particles, 4 to 6 parts of glass particles, 5 to 7 parts of silicon carbide, 5 to 8 parts of aluminium carbide, 2 to 5 parts of silicon dioxide, 2 to 5 parts of magnesium oxide, 3 to 6 parts of graphite, 10 to 12 parts of frictionpowder, 10 to 12 parts of reclaimed rubber, 8 to 10 parts of silicon carbide whiskers, 8 to 10 parts of magnesium borate whiskers and 6 to 8 parts of vanadium pentoxide. The ceramic brake block provided by the invention has the advantage that through the ingredient improvement matching and the composition, the technical problems of easy rustiness, higher noise, unstable high-temperature friction performance, easy locking or dragging friction, lower abrasion resistance performance and the like in the prior art are solved.

The invention discloses a heat treatment method after magnesia carbon brick recovery. The heat treatment comprises the following steps: firstly, selecting magnesia carbon bricks and removing sundry bricks and impurities attached on the magnesia carbon bricks; secondly, performing watering treatment on the collected magnesia carbon bricks; thirdly, putting the watered magnesia carbon bricks into a semi-sealed device, heating to 500-800 DEG C from the room temperature at a rate of 5-20 DEG C per minute and then carrying out heat-retaining heat treatment, wherein the heat retaining time ranges from 6 to 24 hours; crushing the magnesia carbon bricks after the heat treatment and removing iron to obtain magnesia carbon powder. The heat treatment method is characterized in that the non-dried used recycled magnesia carbon bricks are subjected to semi-sealed type heat treatment, in a semi-sealed iron housing, water in the used recycled magnesia carbon bricks is heated to form water vapor which is not discharged immediately and formed into high-pressure water vapor, the high-pressure water vapor promotes hydration of aluminum carbide in the used recycled magnesia carbon bricks, and therefore, an independent water vapor treatment process is reduced and the treatment cost of the used recycled magnesia carbon bricks is reduced; meanwhile, in the meantime, the oxidization loss of graphite in the used recycled magnesia carbon bricks is reduced and the utilization rate of the used recycled magnesia carbon bricks is increased.

The invention discloses an aluminium nitride-based multi-element nano-composite ceramic die material and a preparation method thereof. The material comprises the following raw materials in parts by weight: 60-80 parts of aluminium nitride, 10-20 parts of aluminium carbide, 15-25 parts of silicon boride, 2-6 parts of scandium oxide, 4-8 parts of neodymium oxide, 2-4 parts of chromium, 1-3 parts of tungsten and 1-3 parts of nickel, wherein nanoscale powder of all the materials is adopted; the grain size of aluminium nitride is 10-100 nanometers; the grain sizes of aluminium carbide and silicon boride are 1-10 nanometers; the grain sizes of the other raw materials are 1-100 nanometers. The preparation method is characterized by using aluminium nitride as the matrix, adding aluminium carbide and silicon boride as reinforcing phases, scandium oxide and neodymium oxide as stabilizing agents and chromium, tungsten and nickel as sintering aids and carrying out hot pressed sintering on the materials, thus preparing the material. A die has strong ageing and defect resistance, good comprehensive mechanical properties and excellent antifriction and wear resistance properties.

The invention relates to the technical field of particle reinforced aluminum matrix composites, in particular to a nano aluminium carbide reinforced aluminum matrix composite prepared in situ, and a preparation method thereof. Nano aluminium carbide particles prepared in situ are used as the reinforced particles of the composite, and aluminum is used as matrix, wherein the volume fraction of the nano aluminium carbide particles is 6 Vol.%-10 Vol.%, and the balance is the aluminum matrix. According to the aluminum matrix composite, common carbon black powder and aluminum powder on market are used, and the nano aluminium carbide particle reinforced aluminum matrix composite is prepared in situ through a simpler powder metallurgy process; and the problems of dispersity and interface bonding of nano materials are solved, and the aluminum matrix composite is used as the substitute material for a carbon nano tube/graphene reinforced aluminum matrix composite. The preparation process is simple, and the aluminum matrix composite is easy to produce; and the nano aluminium carbide reinforced aluminum matrix composite taking functionality, strength, plasticity and toughness into account is achieved.