Tantalum hafnium carbide
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Surname | Tantalum hafnium carbide | ||||||||||||
Molecular formula | Ta 4 HfC 5 | ||||||||||||
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properties | |||||||||||||
Molar mass | 962.34 g mol −1 | ||||||||||||
Physical state |
firmly |
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Melting point |
4215 ° C |
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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 . |
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 .
Crystal structure of the similar tantalum carbide
Individual evidence
- ↑ a b Article hafnium in the Encyclopædia Britannica online, accessed March 24, 2008
- ↑ This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.