Titanium carbide

"CTi" redirects here. For Taiwanese broadcaster which uses the CTi branding, see Chung T'ien Television. Titanium carbide Names IUPAC name titanium carbide Other names titanium(IV) carbide Identifiers

• -08-5 Y

3D model (JSmol) ECHA InfoCard 100.031.916 PubChem CID UNII

• 7SHTGW5HBI Y

CompTox Dashboard (EPA)

• InChI=1S/C.Ti/q-1;+1

• [Ti+]#[C-]

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 Magnetic susceptibility (χ) +8.0·10&#;6 cm3/mol 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   (what is YN ?) Chemical compound

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.

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It occurs in nature as a form of the very rare mineral khamrabaevite [uz] (Russian: &#;&#;&#;&#;&#;&#;&#;&#;&#;&#;&#;) - (Ti,V,Fe)C. It was discovered in on Mount Arashan in the Chatkal District,[1] USSR (modern Kyrgyzstan), near the Uzbek border. The mineral was named after Ibragim Khamrabaevich Khamrabaev, director of Geology and Geophysics of Tashkent, Uzbekistan. Its crystals as found in nature range in size from 0.1 to 0.3 mm.

Physical properties

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Titanium carbide has an elastic modulus of approximately 400 GPa and a shear modulus of 188 GPa.[2]

Titanium carbide is soluble in solid titanium oxide, with a range of compositions which are collectively named "titanium oxycarbide" and created by carbothermic reduction of the oxide.[3]

Manufacturing and machining

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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]

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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.[clarification needed]

Titanium carbide can be etched with reactive-ion etching.

Applications

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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.[4] Titanium carbide is also used as a heat shield coating for atmospheric reentry of spacecraft.[5]

aluminium alloy (AA) is almost as strong as steel, but weighs one third as much. Using thin AA rods with TiC nanoparticles allows larger alloys pieces to be welded without phase-segregation induced cracks.[6]

See also

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• Metallocarbohedryne, a family of metal-carbon clusters including Ti8C12

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