High-temperature CMAS resistance performance of Ti2AlC oxide scales

High-temperature CMAS resistance performance of Ti2AlC oxide scales
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Ti2AlC氧化皮的高温耐CMAS性能

DOI:
10.1016/j.corsci.2020.108832
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发表时间:
2020-06
期刊:
影响因子:
8.3
通讯作者:
郭洪波
郭洪波
中科院分区:
材料科学1区
文献类型:
--
作者:
井京;李冀蒙;何喆;何健;郭洪波

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Failure of thermal barrier coatings (TBCs) caused by glassy deposits mostly composed of calcium-magnesium-aluminium-silicate (CMAS) has become an urgent issue. The addition of Al and Ti elements in TBCs is beneficial to improve the CMAS resistance. In this paper, bi-layered oxide scales were formed through pre-oxidation of Ti2AlC (POTAC) bulks at high temperatures. The wettability and spreading behaviors of CMAS on the oxide scales, as well as the interaction between them were investigated by a sessile-drop method. The glassy CMAS deposit on the Al2TiO5layer revealed the largest equilibrium contact angle and slowest diffusion-limited spreading rate among all the samples.
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