Titanium carbide

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Titanium carbide

ChemicalCompound

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Titanium carbide, TiC, is an extremely hard (Mohs 9-9.5) refractory ceramic material, similar to tungsten carbide.It is commercially used in tool bits. It has the appearance of black powder with NaCl-type face centered cubic crystal structure. It is mainly used in preparation of cermets, which are frequently used to machine steel materials at high cutting speed.It is also used as a surface coating on some watches made by Citizen and others such as Tag Heuer.The resistance to wear, corrosion, and oxidation of a tungsten carbide-cobalt material can be increased by adding 6-30% of titanium carbide to tungsten carbide. This forms a solid solution that is more brittle and susceptible to breakage than the original material.Tool bits without tungsten content can be made of titanium carbide in nickel-cobalt matrix cermet, enhancing the cutting speed, precision, and smoothness of the workpiece. This material is sometimes called high-tech ceramics and is used as a heat shield for atmospheric reentry of spacecraft. The substance may be also polished and used in scratch-proof watches.It can be etched with reactive-ion etching.The mineralogical form is very rare and called khamrabaevite - (Ti,V,Fe)C.