Abstract Comparative investigation on the oxidation behavior at 1000 °C of a nanocrystalline duplex coating, which comprised outer Ni + CrAlYNO cermet and inner NiCrAlY layers, a monolayer NiCrAlY coating and a monolayer cermet coating was carried out. The oxidation rates of the duplex coating are the lowest, because non-alumina oxides were detected on both monolayer coatings though α-Al2O3 was formed on all three coatings. The improved oxidation resistance of the duplex coating is attribute to the uphill diffusion of Al from the NiCrAlY layer to the TGO-cermet interface, driven by reactions of 2AlN+3O→Al2O3+2 N and N + Al→AlN.

中文翻译：

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NiCrAlY缓冲层增强Ni+CrAlYNO纳米复合涂层的氧化机理

摘要 对由Ni + CrAlYNO 金属陶瓷外层和NiCrAlY 内层、单层NiCrAlY 涂层和单层金属陶瓷涂层组成的纳米晶双相涂层在1000 °C 下的氧化行为进行了对比研究。双相涂层的氧化率最低，因为尽管在所有三种涂层上都形成了 α-Al2O3，但在两种单层涂层上都检测到了非氧化铝。双相涂层的抗氧化性提高是由于 Al 从 NiCrAlY 层向上扩散到 TGO-金属陶瓷界面，由 2AlN+3O→Al2O3+2 N 和 N+Al→AlN 的反应驱动。