Abstract
The influence of water vapor on the oxidation of Ti3AlC2 and Ti2AlC (TACs) was investigated at 500-1200 degrees C in controlled humidity atmospheres. Breakaway oxidation occurred in wet atmospheres at 500-600 degrees C because water vapor induced cracks in the oxide scales and prevented the formation of a protective Al2O3 scale. At elevated temperatures, water vapor slightly accelerated the oxidation of TACs due to the enhanced mass transportation process through the increased oxygen vacancy. (C) 2007 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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