The Oxidation of Functionally Gradient NiCrAlY/YSZ Coatings

The Oxidation of Functionally Gradient NiCrAlY/YSZ Coatings
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功能梯度NiCrAlY/YSZ涂层的氧化

DOI：
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发表时间：
2001
期刊：
影响因子：
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通讯作者：
D. B. Lee
D. B. Lee
中科院分区：
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文献类型：
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作者：
K. Park;H. Choi;H. ;D. B. Lee

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采用 APS 制备了功能梯度 NiCrAlY/- 和 NiCrAlY/- - 涂层。喷涂态微观结构由富金属和富陶瓷区域组成，由于 APS 过程中的氧化，富金属层和富陶瓷区域之间存在富层。在 900 和空气中的氧化过程中，预先存在的富氧化皮生长，这主要是由于 Al 与沿异质相边界向内传输的氧​​发生优先反应。随着涂层中陶瓷含量的增加，抗氧化能力也随之增强。
Functionally gradient NiCrAlY/- and NiCrAlY/- - coatings were prepared by APS. The as-sprayed microstructure consisted of metal-rich and ceramic-rich regions, between which -rich layers existed owing to the oxidation during APS. During oxidation between 900 and in air, the pre-existing -rich scales grew, due mainly to the preferential reaction of Al with inwardly transporting oxygen along the heterogeneous phase boundaries. As the amount of ceramics in the coating increased, the oxidation resistance increased.