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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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溅射CoCrAlY涂层中缺陷对其性能的影响
, PP. 63-68
Keywords: CoCrAlY涂层,缺陷,氧化,热腐蚀,热疲劳
Abstract:
研究了溅射Co-30Cr-6Al-0.5Y涂层中缺陷对涂层抗高温氧化,热腐蚀及热疲劳性能的影响。结果表明在氧化条件下,缺陷导致Al的内氧化,在1100℃时,由于Al的大量内消耗,涂层表面已不能形成单一的氧化铝膜,使氧化性能下降;在热腐蚀条件下,缺陷成为硫向涂层中扩散的通道,导致涂层及基体的硫化;在冷热疲劳条件下,缺陷成为裂纹源,在交变应力作用下,裂纹向基体中扩展,降低了涂层的热疲劳性能。
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