Vanadium carbide
Crystal structure | |||||||||||||||||||
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__ V 4+ __ C 4− | |||||||||||||||||||
General | |||||||||||||||||||
Surname | Vanadium carbide | ||||||||||||||||||
other names |
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Ratio formula | VC | ||||||||||||||||||
Brief description |
black odorless powder |
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External identifiers / databases | |||||||||||||||||||
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properties | |||||||||||||||||||
Molar mass | 62.95 g mol −1 | ||||||||||||||||||
Physical state |
firmly |
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density |
5.77 g cm −3 |
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Melting point |
2810 ° C |
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boiling point |
3900 ° C |
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solubility |
practically insoluble in water |
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safety instructions | |||||||||||||||||||
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As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions . |
Vanadium carbide is an intermetallic compound from the group of carbides .
Occurrence
Vanadium carbide is formed in ( steel ) alloys containing vanadium . In addition to tungsten carbide (WC), it is one of the most (thermally) stable special carbides.
Extraction and presentation
Vanadium carbide can be obtained by reacting vanadium or vanadium pentoxide with carbon .
properties
Vanadium carbide has a cubic crystal structure similar to sodium chloride . The vanadium dicarbide VC 2 (CAS number: 12542-39-1, melting point 2165 ° C), on the other hand, has a pseudo-hexagonal crystal structure.
use
Because of its great hardness and temperature resistance, vanadium carbide is used commercially for tool bits and cutting tools , as well as in alloys (inhibits grain growth ), for surface coatings and cermets e.g. B. used together with tungsten carbide .
safety instructions
Vanadium carbide is classified as carcinogenic and germ cell mutagenic in category 2.
Individual evidence
- ↑ a b c d e f g Entry on vanadium carbide in the GESTIS substance database of the IFA , accessed on September 4, 2016(JavaScript required) .
- ↑ Georg Brauer (ed.) U. a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume III, Ferdinand Enke, Stuttgart 1981, ISBN 3-432-87823-0 .
- ^ Günter Bauer et al .: Vanadium and Vanadium Compounds . In: Ullmann's Encyclopedia of Industrial Chemistry, Wiley-VCH, Weinheim 2000, doi : 10.1002 / 14356007.a27_367 .