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The Morphology of Thermally Grown α-Al2O3 Scales on Fe-Cr-Al Alloys

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Abstract

The morphology and growth kinetics of protectiveα-Al2O3 scales formed duringhigh-temperature oxidation of the Fe-Cr-Al andFe-Cr-Al-Y alloys were studied. Scanning electronmicroscopy observations were focused on the oxidewrinkling phenomenonand formation of interfacial cavities in the course ofoxidation of the yttrium-free alloy. In this paper,emphasis is also placed on the effects of surface preparation and yttrium additions on the scaleand scalealloy interface structures. Several features ofalumina morphology, which have not received sufficientattention previously, are discussed in the context of existing models; some criticalissues are outlined.

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  1. Vladimir K. Tolpygo
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Tolpygo, V.K. The Morphology of Thermally Grown α-Al2O3 Scales on Fe-Cr-Al Alloys. Oxidation of Metals 51, 449–477 (1999). https://doi.org/10.1023/A:1018839227090

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