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表面喷丸处理对NiCrAlYSi涂层恒温氧化行为的影响

Guanxi Liu,Guanghong Huang,Xuekun Luo,Zaoyu Shen,Limin He,Jianping Li,Rende Mu

ACTA METALLURGICA SINICA（2021）

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Abstract
采用真空电弧离子镀工艺制备了NiCrAlYSi涂层,研究了NiCrAlYSi涂层表面喷丸处理对其恒温氧化行为的影响.结果表明,喷丸处理工艺可降低涂层表面粗糙度,提高涂层表面致密性和平整性.在恒温氧化过程中,经过喷丸处理后的涂层能减少O原子向内扩散从而避免异常氧化区的出现,同时形成的热生长氧化(TGO)层厚度更加均匀,通过0.4 MPa、5 min喷丸处理后,NiCrAlYSi涂层TGO层厚度生长速率较未喷丸处理涂层降低60％,抗氧化性能得到提高.
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Key words
NiCrAlYSi coating, vacuum arc ion plating, shot peening, isothermal oxidation, thermally grown oxide (TGO) layer
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