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刘林涛,李争显,陈云飞,彭易发.N5基体与NiCrAlY粘结层界面元素互扩散行为研究[J].稀有金属材料与工程(英文),2019,48(1):197~204.[Liu Lintao,Li Zhengxian,Chen Yunfei and Peng Yifa.The interdiffusion behavior of interface elements between N5 substract and NiCrAlY bond coatings[J].Rare Metal Materials and Engineering,2019,48(1):197~204.]
The interdiffusion behavior of interface elements between N5 substract and NiCrAlY bond coatings
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Received:May 25, 2017  Revised:July 30, 2017
DOI:
Key words: Thermal barrier coating  interface inter-diffusion  diffusion barrier
Foundation item:国家重点基础研究发展计划项目(2012CB625102);国家青年自然(51501155),
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Liu Lintao,Li Zhengxian,Chen Yunfei and Peng Yifa  
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Abstract:
      In this article, NiCrAlY bond coatings was deposited on the Ni-based superalloy (N5) by EB-PVD, and the sample was oxidized by the constant temperature of 1000℃ for different time. Interdiffusion behavior of interface between subatrate and bond coat, as well as, the foramation mechanism of reaction zone was analyaed by SEM、EDS and XRD. The result shows that the elements of Al and Cr in the NiCrAlY coating was diffused to the N5 substrate and formed an interdiffusion reaction zone dominated with β-NiAl phase and α-Cr phase; and the Ni elements in the N5 substrate was diffused to the NiCrAlY coatings, forming the secondary reaction zone and TCP phase, which was mainly composed with the γ’-Ni3Al and refractory metal respectively.