Titanium carbide

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This article is about bulk material. For titanium-carbon clusters, see metallocarbohedryne.
Titanium carbide
TiC-xtal-3D-vdW.png
Identifiers
CAS number 12070-08-5 YesY
Properties
Molecular formula TiC
Molar mass 59.89 g/mol
Appearance black powder
Density 4.93 g/cm3
Melting point 3,160 °C (5,720 °F; 3,430 K)
Boiling point 4,820 °C (8,710 °F; 5,090 K)
Solubility in water insoluble in water
Structure
Crystal structure Cubic, cF8
Space group Fm3m, No. 225
Coordination
geometry
Octahedral
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
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Infobox references

Titanium carbide, TiC, is an extremely hard (Mohs 9-9.5) refractory ceramic material, similar to tungsten carbide. It has the appearance of black powder with the sodium chloride (face-centered cubic) crystal structure. It occurs in nature as a form of the very rare mineral khamrabaevite - (Ti,V,Fe)C.

Titanium carbide is used in preparation of cermets, which are frequently used to machine steel materials at high cutting speed. It is also used as an abrasion-resistant surface coating on metal parts, such as tool bits and watch mechanisms.[citation needed] Titanium carbide is also used as a heat shield coating for atmospheric reentry of spacecraft.[citation needed]

Physical Properties[edit]

Titanium carbide has an elastic modulus of approximately 400GPa and a shear modulus of 188GPa.[1]

Manufacturing and machining[edit]

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.[citation needed]

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.[citation needed]

Titanium carbide can be etched with reactive-ion etching.

See also[edit]

References[edit]

  1. ^ Chang, R; Graham, L (1966). Applied Physics 37: 3778.