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Effect of texture on oxidation resistance of Ti3AlC2
Journal of the European Ceramic Society ( IF 5.7 ) Pub Date : 2018-03-09 , DOI: 10.1016/j.jeurceramsoc.2018.03.009
Ludi Xu , Degui Zhu , Yunlong Liu , Tohru S. Suzuki , Byung-nam Kim , Yoshio Sakka , Salvatore Grasso , Chunfeng Hu

Oxidation resistance of textured Ti3AlC2 ceramics was measured in the temperature range 1273–1573 K. It was found that the oxidation was markedly anisotropic and the samples exhibited a better oxidation resistance when tested along a direction transverse to the c-axis. This behavior was attributed to the rapid diffusion of Al within its basal planes to form a passivating Al2O3 scale and it respected Ellingham diagrams. The scales formed had different compositions depending on the testing direction; this response was clearly resulting from the crystallographic orientation. Even at 1473 K after 20 h exposure, the samples tested in a direction transverse to the c-axis showed a reduced weight gain which was 45 times lower than one seen on a basal plane.



中文翻译:

织构对Ti 3 AlC 2的抗氧化性的影响

在1273–1573 K的温度范围内测量了纹理化的Ti 3 AlC 2陶瓷的抗氧化性。结果发现,当沿垂直于c轴的方向进行测试时,氧化具有明显的各向异性,并且样品表现出更好的抗氧化性。此行为归因于Al在其基面内的快速扩散,从而形成钝化的Al 2 O 3。比例尺,并且尊重Ellingham图。取决于测试方向,所形成的氧化皮具有不同的成分。这种反应显然是由晶体学取向引起的。即使在暴露20小时后的1473 K,在垂直于c轴的方向上测试的样品也显示出减少的重量增加,这是在基面上看到的重量增加的45倍。

更新日期:2018-03-09
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