| Abstrakt: |
The main modes of isothermal oxidation of Fe-Cr-Al, Ni-Cr-Al, and Co-Cr-Al Alloys, containing 10-15 % or 26-30 % Cr and 0.9-1.3 % or 4.3-5.7% Al, in oxygen at 1000 and 1200° C are summarized. Where protective α- Al O scales always predominate, their ease of formation is in the order Fe-Cr-Al > Ni-Cr-Al > Co-Cr-Al. However, where catastrophic breakaway is possible, Ni-Cr-Al gives the most reliably protective scales, whereas Co-Cr-Al produces the most generally distributed breakaway or initially nonprotective scales, and Fe-Cr-Al the most locally catastrophic breakaway. The oxidation behavior is discussed in terms of the pertinent alloy and oxide parameters. [ABSTRACT FROM AUTHOR] |
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