What is the performance preparation and application of chromium carbide?
Release time:
2022-08-15 13:50
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What is the performance preparation and application of chromium carbide?
Chromium carbide is a light brown metallic cubic crystal powder. Cubic crystal system, lattice constant a = 0.4454nm, relative density 13.9; melting point 3880; boiling point 4780. Mohs hardness 9~10, thermal conductivity 22W/(m.k), thermal expansion coefficient 6.29 10-6.k-1. Can withstand high temperature, hardness and diamond. Insoluble in water, insoluble in inorganic acid, soluble in hydrofluoric acid and nitric acid mixed acid, can be decomposed. Strong oxidation resistance, easily decomposed by potassium pyrosulfate melting. Good conductivity and superconductivity, so what are the properties of tantalum carbide preparation and application?
What is the performance preparation and application of chromium carbide?
chromium carbide preparation method:
1. Tantalum pentoxide and carbon black as raw materials. Tantalum pentoxide and carbon black are thoroughly mixed, placed in a reduction furnace, and heated and reduced in 1500 in hydrogen or vacuum to obtain tantalum carbide powder. Alternatively, the tantalum carbide may be obtained by heating to 1900 in an inert gas for primary reduction and then performing secondary carbonization under vacuum conditions. You can also use aluminum to reduce tantalum pentoxide in a graphite crucible. When the temperature is heated to 2000, pure graphite blocks are added to change the excess aluminum into aluminum carbide, and then cooled and removed. The reactant is then pulverized, and impurities are removed with an inorganic acid to obtain high-purity tantalum carbide crystals. Coarse-grained tantalum carbide can also be prepared by direct carbonization of tantalum and carbon black.
Tantalum carbide company introduced the performance, preparation and application of tantalum carbide.
2. Chromium carbide application: In cemented carbide, it is widely used as an additive. Its main function is to improve the high temperature strength of cemented carbide, restrain the growth of tungsten carbide particles, and be used as a hard coating in cutting tools to increase the chemical resistance and wear resistance of the base metal. Militarily, it can be used as a coating for jet engine turbine blades and rocket nozzles, which can significantly improve its ablation resistance and extend its service life due to its good electrical conductivity. Therefore, it can be used for electrode materials and cut into complex shapes by electric spark. As the second phase, particle-reinforced metal matrix composites have been widely used in aerospace, metallurgy, building materials, electric power, hydropower, mining and other fields.
3. Chromium carbide use: It can be used as an additive for cutting tools, fine ceramics, chemical vapor deposition and hard wear-resistant alloys to improve the toughness of the alloy. The sintered body of tantalum carbide has a golden yellow color and can be used as an ornament.
The above is the performance of the preparation and application of chromium carbide for you? The relevant knowledge, now chromium carbide is widely used by us, I hope it can help you!
Chromium carbide
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