Observation of a metastable B2 phase in rapidly solidified ribbons of Nb-Al alloys
- Ohio State Univ., Columbus, OH (United States). Dept. of Material Science and Engineering
Alloys based on the Nb-Al system are of considerable interest since the A15 compound Nb[sub 3]Al is superconducting with high J[sub c] and H[sub c]. Moreover, alloys based on this compound have received considerable attention recently for potential high temperature structural use. Unfortunately, the compound is extremely brittle and impossible to shape using conventional methods. Thus, the full potential of alloys based on this compound is unlikely to be realized unless a more fundamental understanding of the physical metallurgy of the system is achieved, upon which basis improvements in properties of the compound may be made. In this paper, the authors describe a TEM study of the phase present in melt-spun ribbons of binary Nb-Al alloys. In part, this study has been carried out to determine whether upon rapid solidification the A2 or B2 version forms. The effects of heat treatment are considered and the significance of these observations for the origins of the B2 phase are discussed.
- OSTI ID:
- 6008264
- Journal Information:
- Scripta Metallurgica et Materialia; (United States), Journal Name: Scripta Metallurgica et Materialia; (United States) Vol. 29:10; ISSN SCRMEX; ISSN 0956-716X
- Country of Publication:
- United States
- Language:
- English
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