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Thermal plasma treatment of titanium carbide powders: Part II. In-flight formation of carbon-site vacancies and subsequent nitridation in titanium carbide powders during induction plasma treatment

Published online by Cambridge University Press:  31 January 2011

Takamasa Ishigaki ,
Yusuke Moriyoshi ,
Takayuki Watanabe  and
Atsushi Kanzawa
Takamasa Ishigaki*
Affiliation:
National Institute for Research in Inorganic Materials, 1–1, Namiki, Tsukuba-shi, Ibaraki 305, Japan
Yusuke Moriyoshi
Affiliation:
National Institute for Research in Inorganic Materials, 1–1, Namiki, Tsukuba-shi, Ibaraki 305, Japan
Takayuki Watanabe
Affiliation:
Department of Chemical Engineering, Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo 152, Japan
Atsushi Kanzawa
Affiliation:
Department of Chemical Engineering, Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo 152, Japan
*
a) Author to whom correspondence should be addressed.
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Abstract

The in-flight modification of titanium carbide powders was carried out in radio-frequency (rf) inductively coupled plasmas. The powders were partially melted and evaporated, and then subjected to modifications in morphology, size, and chemical composition. Both the Ar–H2 and Ar–N2 plasma treatments induced the formation of carbon-site vacancies in titanium carbide. The mixing of NH3 to Ar–H2 plasma at the plasma tail, and the Ar–N2 plasma treatment resulted in the partial substitution of carbon by nitrogen. The variation in physical and chemical modification was discussed compared with the predictions by the thermochemical analysis, and the numerically obtained heat transfer of our preceding paper.

Type
Articles
Information
Journal of Materials Research , Volume 11 , Issue 11 , November 1996 , pp. 2811 - 2824
Copyright
Copyright © Materials Research Society 1996

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References

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