Tantalum hafnium carbide

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General
Surname Tantalum hafnium carbide
Molecular formula Ta 4 HfC 5
External identifiers / databases
CAS number 71243-79-3
EC number 275-291-2
ECHA InfoCard 100.068.426
Wikidata Q424268
properties
Molar mass 962.34 g mol −1
Physical state

firmly

Melting point

4215 ° C

safety instructions
GHS hazard labeling
no classification available
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Tantalum hafnium carbide (Ta 4 HfC 5 ) is an intermetallic compound made of tantalum , hafnium and carbon . It is an extremely hard, non-oxide ceramic . It has the highest currently known melting point of 4215 ° C (4488 K ). Only tantalum carbide in the form TaC 0.89 has a similarly high melting point (4000 ° C). It is also the only known material that can not be welded or cut with a Langmuir torch ( Arcatom welding ). In terms of its appearance and chemical and physical properties, it is similar to tantalum carbide and hafnium carbide .


Individual evidence

  1. ↑ a b Article hafnium in the Encyclopædia Britannica online, accessed March 24, 2008
  2. ↑ This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.

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