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AttributesValues
rdfs:label
  • Tantalum carbide
rdfs:comment
  • Tantalum carbide (TaC) is an extremely hard (Mohs hardess 9-10) refractory ceramic material, commercially used in tool bits for cutting tools. The hardness even exceeds that of diamond . It is a heavy, brown powder usually processed by sintering, and an important cermet material. It is sometimes used as a fine-crystalline additive to tungsten carbide alloys. Tantalum carbide has the distinction of being the stoichiometric binary compound with the highest known melting point, at 4150 K (3880°C) . The substoichiometric compound TaC0.89 has a higher melting point, near 4270 K (4000°C).
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ImageFile
  • Tantalum_carbide.jpg
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dbkwik:ceramica/pr...iPageUsesTemplate
Name
  • Tantalum carbide
OtherNames
  • tantalum carbide
ImageName
  • Tantalum carbide
abstract
  • Tantalum carbide (TaC) is an extremely hard (Mohs hardess 9-10) refractory ceramic material, commercially used in tool bits for cutting tools. The hardness even exceeds that of diamond . It is a heavy, brown powder usually processed by sintering, and an important cermet material. It is sometimes used as a fine-crystalline additive to tungsten carbide alloys. Tantalum carbide has the distinction of being the stoichiometric binary compound with the highest known melting point, at 4150 K (3880°C) . The substoichiometric compound TaC0.89 has a higher melting point, near 4270 K (4000°C). When used as a mould coating, it produces a low friction surface. Tantalum carbide-graphite composite material, developed in Los Alamos National Laboratory, is one of the hardest materials ever synthesized. Dusts from grinding can be flammable. Substances to avoid are: flammable gases (dust may form explosive mixtures with gases)
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