Titanium carbide - a compound of carbon and metallic titanium (chemical formula TiC). This is a powder that has a light gray tint and is distinguished by special strength characteristics (9 on the Mohs scale , ~ 30 GPa), heat resistance and resistance to the action of certain acids (sulfuric and hydrochloric). However, titanium carbide is soluble in aqua regia, as well as in mixtures of hydrofluoric (HF) and nitric (HNO3) acids and alkali melts. Component of heat-resistant, heat-resistant and hard alloys, abrasive material; it is used for applying wear-resistant coatings, for the manufacture of crucibles and thermocouple cases that are resistant to melting metals, for lining of vacuum high-temperature furnaces.
| Titanium carbide | |
|---|---|
| General | |
| Systematic name | Titanium carbide |
| Chem. formula | Tic |
| Physical properties | |
| Molar mass | 59.89 g / mol |
| Density | 4.93 g / cm³ |
| Thermal properties | |
| T. melt. | 3260 ± 150 ° C |
| T. bale. | 4300 ° C |
| Structure | |
| Crystal structure | cubic lattice (NaCl type) lattice parameter 0.43270 nm space group Fm3m |
| Classification | |
| Reg. CAS number | 12070-08-5 |
| PubChem | |
| Reg. EINECS number | |
| Smiles | |
| Inchi | |
| ChemSpider | |
Getting
You can get titanium carbide in the form of:
- fibers
- coatings
- single crystals
- powders
Single crystals can be obtained:
- liquid phase method
- solution method
- plasma-chemical method
Powders can be obtained from various reagents.
Obtaining from TiO 2 :
- melting a mixture of oxides with carbon
- carbon thermal method
- plasma chemical synthesis
Preparation of Ti Powder:
- direct synthesis without melting
- SHS
- pseudo-fused TiC
Preparation from Ti Halides:
- plasma chemical synthesis
Preparation from Ti oxides:
- hydrogenation-dehydrogenation
- carbidization of a mixture of titanium chips with soot
Getting from poor raw materials
Possible methods of obtaining [1] [2] :
Due to the low cost and easy availability of TiO 2 in production conditions, titanium carbide is most often obtained from it.
The last stage of the reaction chain is as follows:
Reaction during the PVD process :
CVD process response:
Notes
- ↑ Materials and Corrosion, Volume 30, Issue 12, p. 870-872
- ↑ http://www.ferro-titanit.com/fileadmin/files/ferro-titanit.com/documents/027_DEW_Ferro_Titanit_D.pdf
Literature
- Sergey Sergeevich Kiparisov, Yuri Valentinovich Levinsky, Alexander Petrovich Petrov. Titanium carbide: production, properties, application. - Metallurgy, 1987 .-- 215 p.