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Room and high temperature tensile behaviour of a P/M 2124/MoSi2 composite at different heat treatment conditions

AuthorsTorres, B.; Lieblich, Marcela
Issue Date2006
CitationJournal of Materials Science 41: 3493-3500 (2006)
AbstractIn the present work, a 2124/15 vol%MoSi2 composite was obtained by powder metallurgy. Its microstructure and mechanical properties were investigated at room and at high temperature (up to 200°C) in conditions T351, T4 and after heat treatments at 495°C for up to 100 h. Up to 150°C, tensile properties of 2124/MoSi2 in T351 resulted similar to those of a ceramic reinforced 2124/SiC composite. Yield stress of the 2124/MoSi2 material, after heating at 495°C for up to 100 h, resulted higher than that of the monolith 2124 alloy heated for the same periods. No diffusion reaction phases were formed surrounding the MoSi 2 reinforcing particles during such long exposures to high temperature. Only at 100 h, large plate-like precipitates that contain Al, Cu, Mg and Si appeared. The high thermal stability of this 2124/MoSi2 composite and its good mechanical properties at room and at elevated temperature makes MoSi2 intermetallic a competitor of ceramic reinforcements. © 2006 Springer Science + Business Media, Inc.
Identifiersdoi: 10.1007/s10853-005-5678-1
issn: 0022-2461
Appears in Collections:(CENIM) Artículos
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