A kind of preparation method of copper-based nano-graphite composite material and composite material thereof
A technology of nano-graphite and composite materials, which is applied in metal processing equipment, transportation and packaging, etc. It can solve problems such as weak performance, uneven powder distribution, and performance changes, and achieve low cost, long service life, and simple materials.
Active Publication Date: 2020-01-31
DATONG XINCHENG NEW MATERIAL CO LTD
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- Application Information
AI Technical Summary
Problems solved by technology
Due to the influence of graphite or the proportion, there is a serious uneven distribution of powder during the mixing process, so its performance has changed again, which eventually leads to its weak performance in some aspects, and a series of problems in the use process.
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0026] In the following, the present invention will be further described in conjunction with the embodiments:
[0027] The invention has carried out detailed research on the raw materials, ingredients and preparation process, and the prepared copper-based nano-graphite composite material has a volume density of 10.0-15.0g / cm3, a resistivity ≤4.0μΩm, a tensile strength ≥130Mpa, and an impact toughness ≥8J / cm2.
[0028] After many experiments, research and analysis, and product trial production, the inventor chose raw materials with a density of 8.92×103 / cm3, a resistivity of 1.694*10-8Ω·m, and a purity of 99.9% pure copper as aggregate; Nano graphite of 50-100nm is powder.
[0029] The product is obtained after atomization, degreasing, powder mixing, primary sintering and re-sintering of aggregate.
[0030] Atomization, its working principle is to apply a rated voltage of several thousand volts to the surface of the liquid flow in the capillary emitter, and use the established strong...
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Abstract
The invention discloses a method for preparing a copper-based nano-graphite composite material, comprising the following steps: S1, raw materials, the copper base of the aggregate is pure copper powder, and the powder is nano-graphite powder; S2, atomization, the aggregate is passed through an electric motor Mechanical atomization, the cooling rate reaches 105-106K / s, and the average particle size is 0.1-5μm; S3, degreasing, put the atomized aggregate and nano-graphite powder into the alkali cleaning solution for ultrasonic degreasing, alkali The temperature of the washing solution is usually 65-75°C, soaking for 5-10min; S4, mixing materials, mixing the aggregates and powders treated by S2 and S3 according to the weight ratio of 20:80-25:75, and adding liquid medium to mix Uniform; S7, one-time sintering, the mixed material is sintered under the premise of argon to prevent its oxidation, the temperature is 800-950°C, the sintering heat preservation and pressure time is 10-15min, and the sintering pressure is 50-80MPa; S8 , Re-sintering, copper-based nano-graphite composite material obtained by spark plasma sintering process. The invention also discloses the composite material prepared by the above method.
Description
Technical field [0001] The invention relates to a novel carbon material, in particular to a method for preparing a copper-based nano-graphite composite material and the composite material. Background technique [0002] In the application field of pantograph skateboard, the safe operation of electric locomotives is the most important thing. When the pantograph skateboard is rubbing against the pantograph, it will directly contact the wire of the catenary, and at the same time, it must be used in different environments. It has good anti-wear and self-lubricating properties, electrical conductivity, impact resistance, corrosion resistance and arc resistance. [0003] Copper-graphite composite material also has the excellent properties of copper matrix such as high strength, electrical conductivity, thermal conductivity, and ablation resistance. It also has the properties of graphite corrosion resistance, self-lubrication and electrical thermal conductivity. Its comprehensive performan...
Claims
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IPC IPC(8): C22C9/00C22C1/05C22C1/10B22F9/08B22F1/00B22F3/10B22F3/105
CPCC22C1/0425C22C1/05C22C9/00B22F3/1017B22F3/105B22F9/082B22F2998/10B22F2009/0836B22F1/10
Inventor 闵洁
Owner DATONG XINCHENG NEW MATERIAL CO LTD