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Hip Synthesis of Two-Phase MO-TI-SI Alloys

Published online by Cambridge University Press:  01 January 1992

D. S. Schwartz ,
R. J. Lederich  and
D. A. Deuser
D. S. Schwartz
Affiliation:
McDonnell Douglas Aerospace, m/c 111-1041, PO Box 516, St. Louis, MO 63166-0516
R. J. Lederich
Affiliation:
McDonnell Douglas Aerospace, m/c 111-1041, PO Box 516, St. Louis, MO 63166-0516
D. A. Deuser
Affiliation:
McDonnell Douglas Aerospace, m/c 111-1041, PO Box 516, St. Louis, MO 63166-0516
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Abstract

The possibility of producing novel microstructures in MoSi2 materials was examined by HIP reacting MoSi2 and Ti powders at 1400°C/207MPa to produce a two-phase MoSi2-based alloy. The HIP reaction produced MoSi2 + hexagonal (Mo0.42, Ti0.58)5Si3- The (Mo0,42.Ti0.58)5Si3 was composed of 0.5µm diam., equiaxed grains, and the average MoSi2 grain size was reduced by the reaction. Preliminary compression testing showed no loss of strength compared to single-phase MoSi2, and two-phase specimens were compressible to 24% strain without any cracking. The (Mo0.42,Ti058)5Si3 phase appeared to be plastically undeformable even at 1400°C.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 288: Symposium L – High-Temperature Ordered Intermetallic Alloys V , 1992 , 1075
Copyright
Copyright © Materials Research Society 1995

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References

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