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High temperature healing of Ti_2AlC: On the origin of inhomogeneous oxide scale

机译:Ti_2AlC的高温修复:基于不均匀氧化皮的成因

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摘要

The microstructure of oxide scales formed on Ti_2AlC surface after oxidation at 1200 °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 Al_2O_3 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 Ti_2AlC at high temperature.
机译:研究了在1200℃氧化后Ti_2AlC表面形成的氧化皮的微观结构。结果揭示了氧化皮的不均匀形态,即,粗金红石晶粒的岛堆积在细粒的Al_2O_3层上。局部横截面观察表明,金红石岛生长在母体材料的空腔顶部。提出了一个模型来描述氧化后所得的微观结构。这些结果与优化高温下Ti_2AlC的自愈条件有关。

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