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Plasma synthesis of tungsten carbide and cobalt nanocomposite powder
- Source :
-
Journal of Alloys & Compounds . Jul2009, Vol. 481 Issue 1/2, p274-277. 4p. - Publication Year :
- 2009
-
Abstract
- Abstract: Nanosized tungsten carbide–cobalt composite powder was synthesized by a thermal plasma process, in which ammonium paratungstate (APT) and cobalt oxide were reacted with a gas mixture containing CH4, H2, and Ar. The reduction and carburization of vaporized precursors produced nanosized tungsten carbide (WC1−x )–cobalt composite powder, which contained small amounts of W2C and/or W phase. The particle size of synthesized tungsten carbide powder was less than 20nm. The synthesized composite powders were also subjected to a hydrogen heat treatment to fully carburize WC1−x , W2C, and W phases to the WC phase as well as to remove excess carbon in the product. Finally nanosized WC–Co composite powder of particle size less than 100nm was obtained. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 09258388
- Volume :
- 481
- Issue :
- 1/2
- Database :
- Academic Search Index
- Journal :
- Journal of Alloys & Compounds
- Publication Type :
- Academic Journal
- Accession number :
- 41583727
- Full Text :
- https://doi.org/10.1016/j.jallcom.2009.03.134