Helen Green's answer to What is tungsten carbide? - Quora

submitted 1 month ago, Monday, Oct 15, 2018, 20:13:41 by julissa.zhang in Technology / Science
Tungsten Carbide is a black hexagonal crystal with metallic luster. Its hardness is similar to diamond (that is to say, the hardness of WC is very high), and it is also a good conductor of electricity and heat. Tungsten carbide is insoluble in water, hydrochloric acid and sulfuric acid, and is easily soluble in a mixed acid of nitric acid-hydrofluoric acid. Pure tungsten carbide is brittle (here, high hardness does not mean it isn't brittle), and a small amount of metal such as titanium or cobalt can be added to tungsten carbide to reduce brittleness.
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