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

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–MoSi...

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Veröffentlicht in:Journal of Materials Research 1997-05, Vol.12 (5), p.1315-1326
Hauptverfasser: Fan, Xiaobao, Ishigaki, Takamasa, Sato, Yoichiro
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creator Fan, Xiaobao
Ishigaki, Takamasa
Sato, Yoichiro
description 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,
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subjects CERAMICS
CORROSION RESISTANCE
CRYSTAL-PHASE TRANSFORMATIONS
INTERMETALLIC COMPOUNDS
MATERIALS SCIENCE
MOLYBDENUM SILICIDES
PLASMA
POWDERS
SYNTHESIS
title Phase formation in molybdenum disilicide powders during in-flight induction plasma treatment
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