Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1620895 | Journal of Alloys and Compounds | 2010 | 5 Pages |
Abstract
Bulk TiC/Ti3AlC2 composites containing 5 vol% TiC were fabricated by pressure-assisted self-propagating high-temperature synthesis, and their cyclic oxidation behavior was investigated at 550-950 °C in air for up to 40 cycles. The results demonstrated that at temperatures of 750-950 °C TiC/Ti3AlC2 composites displayed excellent cyclic oxidation resistance. The oxidation kinetics basically followed a parabolic rate law. As revealed by XRD and SEM/EDS, the scales consisted of an outer discontinuous layer of rutile TiO2 and an inner continuous layer of α-Al2O3. The scales were dense, adhesive to the substrate and resistant to thermal cycling. However, at lower temperatures of 550 and 650 °C, the oxidation kinetics followed a linear rate law with larger oxidation rates. The cyclic oxidation resistance was deteriorated owing to the formation of microcracks and voids in the scales.
Related Topics
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Metals and Alloys
Authors
Xukun Qian, Yibin Li, Yue Sun, Xiaodong He, Chuncheng Zhu,