Title

The Effects of Beryllium Additions on the Oxidation of Nickel Aluminide and Titanium Aluminide Based Intermetallics

Author Info

R. H. Hanrahan Jr., Los Alamos National Laboratory
Katherine C. Chen, Los Alamos National LaboratoryFollow
M. P. Brady, Oak Ridge National Laboratory

Recommended Citation

Postprint version. Published in Journal of the Electrochemical Society, May 3, 1998.

NOTE: At the time of publication, the author Katherine C. Chen was not yet affiliated with Cal Poly.

Abstract

The effects of Be additions on the oxidation behavior of β-NiAl in moist air at 1000°C and borderline alumina-forming y (TiAI) + Laves Ti-Al-Cr based alloys at 800°C and 1000°C in dry and moist air were investigated. The addition of Be to β-NiAl suppressed the formation of transient alumina, and resulted in the formation of a protective BeAl₂O₄ spinel phase. In dry air, the addition of Be to the Ti-AI-Cr alloys also resulted in the formation of a protective BeAl₂O₄ spinel phase. In moist air, only Ti-AlCr- Be alloys with a high Cr content (10 to 15 a/o) formed the protective BeAl₂₄scale.

Disciplines

Materials Science and Engineering

Copyright

The Electrochemical Society, Inc. 1998.

Publisher statement

All rights reserved. Except as provided under U.S. copyright law, this work may not be reproduced, resold, distributed, or modified without the express permission of The Electrochemical Society (ECS).