YSZ/NiCrAlY interface oxidation of APS thermal barrier coatings
YSZ/NiCrAlY interface oxidation of APS thermal barrier coatings
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APS热障涂层的YSZ/NiCrAlY界面氧化
DOI：
10.1016/j.corsci.2018.06.035
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发表时间：
2018-09-01
影响因子：
8.3
通讯作者：
Zhou, Guangwen
中科院分区：
文献类型：
--
作者：
Hu, Yao;Cai, Canying;Zhou, Guangwen
研究了空气等离子喷涂（APS）热障涂层界面氧化诱导的微观组织演变。随着氧化过程的进行，在YSZ/NiCrAlY界面处形成的热生长氧化物（TGO）由双层结构、三层结构、四层结构依次发展为Al2O3、Y3Al5O12 （YAG）、NiCr2O4和NiO。提出了一种氧化机制来解释层状TGO的生长。YAG的形成消耗了下面的氧化铝层，促进了Cr和Ni的向外扩散，导致对TBC寿命的不利影响。
The interface oxidation induced microstructural evolution of air plasma spayed (APS) thermal barrier coatings (TBCs) is investigated. As the oxidation progresses, the thermally grown oxide (TGO) formed at the YSZ/NiCrAlY interface develops from a bi-layered structure, to a three-layered structure, then to a four-layered structure of Al2O3, Y3Al5O12 (YAG), NiCr2O4 and NiO, respectively. An oxidation mechanism is proposed to account for the growth of the layered TGO. The YAG formation consumes the underlying alumina layer and facilitates the outward diffusion of Cr and Ni, leading to a detrimental effect on the TBC life.