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Fabrication and High‐Temperature Phase Stability of Mo(Al,Si) 2 —MoSi 2 Intermetallics
Author(s) -
Ramberg C. Eric,
Worrell Wayne L.
Publication year - 2000
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.2000.tb01300.x
Subject(s) - intermetallic , materials science , hot pressing , fabrication , sintering , pellets , phase (matter) , metallurgy , homogeneous , composite material , thermodynamics , chemistry , medicine , alternative medicine , physics , organic chemistry , alloy , pathology
A two‐step processing technique was used to make dense, homogeneous intermetallics in the Mo(Al,Si) 2 —MoSi 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 1600°—1800°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 2 was <5% at 1800°C. Samples that had 10% Al substituted for Si yielded approximately equal amounts of MoSi 2 and Mo(Al,Si) 2 .