Fabrication and high-temperature phase stability of Mo(Al,Si){sub 2}-MoSi{sub 2} intermetallics

A two-step processing technique was used to make dense, homogeneous intermetallics in the Mo(Al,Si){sub 2}-MoSi{sub 2} system. A variation of self-propagating high-temperature synthesis was used, in which starting pellets were nucleated at room temperature to make intermetallic powders from metallic...

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Bibliographic Details
Published in:Journal of the American Ceramic Society 2000-04, Vol.83 (4)
Main Authors: Ramberg, C.E., Worrell, W.L.
Format: Article
Language:English
Subjects:
ALUMINIUM SILICIDES
HOT PRESSING
INTERMETALLIC COMPOUNDS
MATERIALS SCIENCE
MOLYBDENUM SILICIDES
PHASE DIAGRAMS
PHASE STUDIES
POWDERS
REACTION KINETICS
TEMPERATURE RANGE 1000-4000 K
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Summary:A two-step processing technique was used to make dense, homogeneous intermetallics in the Mo(Al,Si){sub 2}-MoSi{sub 2} system. A variation of self-propagating high-temperature synthesis was used, in which starting pellets were nucleated at room temperature to make intermetallic powders from metallic precursors, followed by uniaxial hot pressing at 1,600--1,800 C to achieve densification. The samples were held at the hot-pressing temperatures for several hours; therefore, this study also provided qualitative phase-stability information. The solubility limit of Al for Si in MoSi{sub 2} was
ISSN:0002-7820
1551-2916