Tungsten carbide powder (WC) is the main raw material for producing hard alloys with the chemical formula WC. Tungsten carbide powder is a black hexagonal crystal with metallic luster and hardness similar to diamond, making it a good conductor for electricity and heat. Melting point 2870 ℃, boiling point 6000 ℃, relative density 15.63 (18 ℃). Tungsten carbide is insoluble in water, hydrochloric acid, and sulfuric acid but easily soluble in mixed acids of nitric acid and hydrofluoric acid. Pure tungsten carbide is fragile, but adding a small amount of metals such as titanium and cobalt can reduce its brittleness. Tungsten carbide used as a cutting tool for steel is often added with titanium carbide, tantalum carbide, or their mixtures to enhance its blast resistance. The chemical properties of tungsten carbide are stable.
Tungsten carbide powder
Tungsten carbide powder is a dark gray powder that can dissolve in various carbides, especially in titanium carbide, with high solubility, forming a TiC WC solid solution. Another compound of tungsten and carbon is tungsten carbide, with the chemical formula W2C, a melting point of 2860 ℃, a boiling point of 6000 ℃, and a relative density of 17.15. Its properties, preparation method, and application are the same as tungsten carbide powder.
Tungsten carbide powder is mainly used in the production of hard alloys. In tungsten carbide powder, carbon atoms are embedded in the gaps of the tungsten metal lattice without damaging the original metal lattice, forming interstitial solid solutions, hence also known as interstitial (or insertion) compounds. Tungsten carbide can be produced by heating a mixture of tungsten and carbon at high temperatures, and the presence of hydrogen or hydrocarbons can accelerate the reaction. If tungsten oxygen-containing compounds are used for preparation, the final product must be vacuum treated at 1500 ℃ to remove carbon oxides. Tungsten carbide is suitable for mechanical processing at high temperatures and can be used to make cutting tools and structural materials for kilns, jet engines, gas turbines, nozzles, etc. Tungsten carbide powder can also be used to manufacture high-temperature resistance materials, electric heating elements, electronic packaging materials, etc.
Semiconductor-grade tungsten carbide powder is a powder material with high purity and fine particles, mainly composed of carbon and tungsten elements. It is a form of tungsten carbide material with excellent semiconductor properties and thermal stability. Its applications are mainly concentrated in the semiconductor and electronics industries. It can be used as a manufacturing material for semiconductor devices, such as the gate material in metal oxide semiconductor field-effect transistors (MOSFETs) on silicon wafers.
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