| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1602239 | Intermetallics | 2006 | 9 Pages |
Abstract
Ternary Ti-Al-Cr alloys offer excellent oxidation stability at elevated temperatures due to the formation of a continuous alumina surface layer during oxidation in air. We have investigated the oxidation kinetics and surface oxide characteristics of several Ti-Al-Cr compositions. It is shown that alloys containing mainly the τ and Laves phase exhibit superior oxidation stability over a wide range of temperatures (750–1100 °C). The best oxidation stability is exhibited by the (Ti0.25Al0.55Cr0.2) alloy containing near 70–75 at. % of τ and 25–30% Laves phases. Further improvement of this alloy's oxidation stability results from synergistic doping by a small amount (01–0.2% atomic) of active metals such as Hf and Y as well as Si (above 1%).
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
G.S. Fox-Rabinovich, D.S. Wilkinson, S.C. Veldhuis, G.K. Dosbaeva, G.C. Weatherly,