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Phase formation in molybdenum disilicide powders during in-flight induction plasma treatment

Published online by Cambridge University Press:  31 January 2011

Xiaobao Fan ,
Takamasa Ishigaki  and
Yoichiro Sato
Xiaobao Fan
Affiliation:
National Institute for Research in Inorganic Materials, 1–1 Namiki, Tsukuba-shi, Ibaraki 305, Japan
Takamasa Ishigaki*
Affiliation:
National Institute for Research in Inorganic Materials, 1–1 Namiki, Tsukuba-shi, Ibaraki 305, Japan
Yoichiro Sato
Affiliation:
National Institute for Research in Inorganic Materials, 1–1 Namiki, Tsukuba-shi, Ibaraki 305, Japan
*
a)Author to whom correspondence should be addressed.
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Abstract

In-flight modification of MoSi2 powders has been carried out by using an Ar–H2 induction plasma. Reactor pressure, powder feed rate, and plate power level were taken as the experimental parameters to alter the thermal history of the injected powder particles. Metastable hexagonal structure of β–MoSi2 is the major phase observed in the Ar–H2 induction plasma-treated molybdenum disilicide powders, while the stable phase of tetragonal structure of α–MoSi2 usually retains no less than 30 wt. %. Depending on the experimental condition and the deviation from stoichiometry in raw materials, low silicides, Mo5Si3 and Mo3Si, and free Si were observed,

Type
Articles
Information
Journal of Materials Research , Volume 12 , Issue 5 , May 1997 , pp. 1315 - 1326
Copyright
Copyright © Materials Research Society 1997

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