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Preparation of ultrafine tungsten carbide powder by CVD method from WCl6–C2H2–H2 mixtures

Published online by Cambridge University Press:  03 March 2011

Chang-Whan Won ,
Byong-Sun Chun  and
H.Y. Sohn
Chang-Whan Won
Affiliation:
Rapidly Solidified Materials Research Center and the Department of Metallurgical Engineering, Chungnam National University, Daejeon 305-764, Korea
Byong-Sun Chun
Affiliation:
Rapidly Solidified Materials Research Center and the Department of Metallurgical Engineering, Chungnam National University, Daejeon 305-764, Korea
H.Y. Sohn
Affiliation:
Department of Metallurgical Engineering, University of Utah, Salt Lake City, Utah 84112-1183
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Abstract

The synthesis of ultrafine tungsten carbide powder from WCl6–C2H2-H2 mixtures was investigated. Under most experimental conditions, a mixture of α–WC and β–W2C was produced. The specific surface area and morphology of the product prepared under various reaction conditions were determined. The product particle size increased with temperature up to 1373 K and then decreased, went through a minimum with increasing WCl6 partial pressure, and decreased with increasing H2 flow rate. The specific surface area of the product showed the opposite trend in all cases.

Type
Articles
Information
Journal of Materials Research , Volume 8 , Issue 10 , October 1993 , pp. 2702 - 2708
Copyright
Copyright © Materials Research Society 1993

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References

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