Processing of a Nb{sub 3}Al-Ti ternary alloy from elemental and prealloyed powders
- Univ. of Nevada, Reno, NV (United States). Dept. of Chemical and Metallurgical Engineering
Niobium aluminides offer the advantage of higher high temperature capability compared to other intermetallic aluminides due to the refractory nature of niobium. However, the reaction sequence in Nb-Al system is sluggish and currently there is a great interest in the processing aspects of these materials. In the present study, a systematic investigation was undertaken to compare the effect of different powder metallurgy processing routes on the phase relations and microstructure of 66Nb-22Al-12Ti (in atom percent) alloy. The three different process routes adopted were: (1) cold pressing followed by reaction sintering; (2) cold pressing and hot pressing followed by sintering; and (3) arc melting, hydride-dehydride process to make the alloy powder followed by cold pressing and then sintering. The samples are analyzed by XRD, Optical Microscopy, SEM-EDS and EPMA. The analysis showed that alloy pellets made from pre-alloyed powders i.e., arc melting followed by hydride-dehydride process, gave good densification and more Nb{sub 3}Al formation.
- OSTI ID:
- 367626
- Report Number(s):
- CONF-960202-; ISBN 0-87339-310-4; TRN: IM9640%%372
- Resource Relation:
- Conference: Annual meeting and exhibition of the Minerals, Metals and Materials Society (TMS), Anaheim, CA (United States), 4-8 Feb 1996; Other Information: PBD: 1996; Related Information: Is Part Of Design fundamentals of high temperature composites, intermetallics, and metal-ceramics systems; Lin, R.Y. [ed.] [Univ. of Cincinnati, OH (United States). Dept. of Materials Science and Engineering]; Chang, Y.A. [ed.] [Univ. of Wisconsin, Madison, WI (United States). Dept. of Materials Science and Engineering]; Reddy, R.G. [ed.] [Univ. of Nevada, Reno, NV (United States). Dept. of Chemical and Metallurgical Engineering]; Liu, C.T. [ed.] [Oak Ridge National Lab., TN (United States). Metals and Ceramics Div.]; PB: 461 p.
- Country of Publication:
- United States
- Language:
- English
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