Synthesis of NiAl, CoAl intermetallics and NiAl-Nb and CoAl-Co composites from elemental powders via solid state reactions
- Technion, Haifa (Israel). Dept. of Materials Engineering
- Drexel Univ., Philadelphia, PA (United States). Dept. of Materials Engineering
NiAl, CoAl intermetallics and NiAl-Nb, CoAl-Co composites were synthesized in solid state from elemental powders. Blends of ultrafine powders were high pressure consolidated to full density. This was followed by heat treatments, resulting in multistage solid state reactive diffusion. The phase composition and microstructure of obtained materials were investigated employing X-ray diffraction, SEM/EDX and TEM. The sequence of reactions in consolidated powder blends was determined, the kinetics of formation of different phases was measured. For Ni-Al-Nb blends, formation of only Ni-Al intermetallic phases including NiAl was detected in temperature range 425 C--550 C. Followed heat treatment at higher temperatures resulted information of NiAl-Nb composite. Phase stability of NiAl-Nb and CoAl-Co composites was investigated in temperature range 800 C--1,100 C.
- OSTI ID:
- 77982
- Report Number(s):
- CONF-950201-; ISBN 0-87339-283-3; TRN: IM9531%%32
- Resource Relation:
- Conference: Annual meeting and exhibition of the Minerals, Metals and Materials Society (TMS), Las Vegas, NV (United States), 12-16 Feb 1995; Other Information: PBD: 1995; Related Information: Is Part Of In situ reactions for synthesis of composites, ceramics, and intermetallics; Barrera, E.V.; Marquis, F.D.S.; Frazier, W.E.; Fishman, S.G.; Thadhani, N.N.; Munir, Z.A.; PB: 226 p.
- Country of Publication:
- United States
- Language:
- English
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