Titanium carbide

This article is about bulk material. For titanium-carbon clusters, see metallocarbohedryne.
Titanium carbide
Identifiers
12070-08-5 YesY
ECHA InfoCard 100.031.916
Properties
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)
insoluble in water
Structure
Cubic, cF8
Fm3m, No. 225
Octahedral
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N verify (what is YesYN ?)
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. Titanium carbide is also used as a heat shield coating for atmospheric reentry of spacecraft.

Physical properties

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

Manufacturing and machining

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.

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.

Titanium carbide can be etched with reactive-ion etching.

See also

References

  1. ↑ Chang, R; Graham, L (1966). "Low‐Temperature Elastic Properties of ZrC and TiC". Applied Physics. 37: 3778. doi:10.1063/1.1707923.
This article is issued from Wikipedia - version of the 8/12/2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.