Journal
SCRIPTA MATERIALIA
Volume 65, Issue 2, Pages 135-138Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2011.03.031
Keywords
Ti2AlC; Ceramics; Oxidation; Microstructure; Crack-healing
Categories
Funding
- TOP-Self Healing Materials program (Senter-the Hague)
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The microstructure of oxide scales formed on Ti2AlC surface after oxidation at 1200 degrees C is investigated. The results reveal an inhomogeneous morphology of the oxide scales, i.e. islands of coarse rutile grains pile up on fine-grained Al2O3 layer. Local cross-sectional observations show that the rutile islands grow on top of cavities in the parent material. A model is proposed to describe the resulting microstructure after oxidation. These results are relevant in optimizing the self-healing conditions of Ti2AlC at high temperature. (C) 2011 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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