The effects of beryllium additions on the oxidation of nickel aluminide and titanium aluminide based intermetallics
- Los Alamos National Lab., NM (United States). Materials Science and Technology Div.
- Oak Ridge National Lab., TN (United States). Metals and Ceramics Div.
The effects of Be additions on the oxidation behavior of {beta}-NiAl in moist air at 1,000 C as well as on the borderline alumina-forming {gamma} + Laves Ti-Al-Cr based alloys at 800 C and 1,000 C in dry and moist air were investigated. The addition of Be to {beta}-NiAl suppressed the formation of transient alumina and resulted in the formation of a protective BeAl{sub 2}O{sub 4} spinel phase. In dry air, the addition of Be to the Ti-Al-Cr alloys also resulted in the formation of a protective BeAl{sub 2}O{sub 4} spinel phase. In moist air, only Ti-Al-Cr-Be alloys with a high Cr content (10 to 15 a/o) formed the protective BeAl{sub 2}O{sub 4} scale.
- Research Organization:
- Oak Ridge National Lab., TN (United States)
- Sponsoring Organization:
- USDOE Assistant Secretary for Fossil Energy, Washington, DC (United States)
- DOE Contract Number:
- AC05-96OR22464
- OSTI ID:
- 290925
- Report Number(s):
- ORNL/CP--99047; CONF-980504--; ON: DE99000382; BR: AA1510000
- Country of Publication:
- United States
- Language:
- English
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