Vanadium carbide

Crystal structure
	__ V 4+ __ C 4−
General
Surname	Vanadium carbide
other names	Vanadium carbide; Vanadium monocarbide; Vanadium (IV) carbide;
Ratio formula	VC
Brief description	black odorless powder
External identifiers / databases
EC number	235-122-5
ECHA InfoCard	100,031,917
PubChem	159387
ChemSpider	27472996
Wikidata	Q421405
properties
Molar mass	62.95 g mol −1
Physical state	firmly
density	5.77 g cm −3
Melting point	2810 ° C
boiling point	3900 ° C
solubility	practically insoluble in water
safety instructions
GHS labeling of hazardous substances	no GHS pictograms
	no GHS pictograms
H and P phrases	H: no H-phrases
	P: no P-phrases
	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 .

{\ displaystyle \ mathrm {V_ {2} O_ {5} +7 \ C \ longrightarrow 2 \ VC + 5 \ CO}}

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 .

[GESTIS-1] ↑ ^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) .

[2] Georg Brauer (ed.) U. a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume III, Ferdinand Enke, Stuttgart 1981, ISBN 3-432-87823-0 .

[ullmann-3] 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 .