The specific information of hafnium carbide powder

HfC

Hafnium carbide (HfC) is a chemical compound of hafnium and carbon. With a melting point of about 3900 ° C it is one of the most refractory binary compounds known.However, it has a low oxidation resistance, with the oxidation starting at temperatures as low as 430 ° C.
Hafnium carbide is usually carbon deficient and therefore its composition is often expressed as HfCx (x = 0.5 to 1.0). It has a cubic (rock-salt) crystal structure at any value of x.
Hafnium carbide powder is obtained by the reduction of hafnium(IV) oxide with carbon at 1800 to 2000 ° C. A long processing time is required to remove all oxygen. Alternatively, high-purity HfC coatings can be obtained by chemical vapor deposition from a gas mixture of methane, hydrogen, and vaporized hafnium(IV) chloride. Because of the technical complexity and high cost of the synthesis, HfC has a very limited use, despite its favorable properties such as high hardness (> 9 Mohs) and melting point.
The magnetic properties of HfCx change from paramagnetic for x &le 0.8 to diamagnetic at larger x. An inverse behavior (dia-paramagnetic transition with increasing x) is observed for TaCx, despite its having the same crystal structure as HfCx.
Product application: Hafnium carbide powder is manufacture high technology and new technology domain and so on high performance hard alloy, aerospace, atomic energy, electronic, coating, flinty thin film and metallurgy automation key materials.Very suitable for rocket nozzle, can make to return to the atmosphere space rocket nose cone parts. Used in ceramic industry, etc.

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