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微晶化对Ni20Cr合金热生长氧化膜应力的影响

, PP. 434-436

Keywords: 微晶化,Ni20Cr合金,氧化膜应力

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Abstract:

利用氧化膜应力原位测量装置对Ni20Cr微晶涂层/合金体系在1000℃空气中氧化过程中发生的弯曲挠度变化进行测量.结果表明,微晶涂层1000℃氧化所形成的Cr2O3氧化膜中存在压应力,应力绝对值高于相同厚度的合金表面的热生长氧化膜,其原因在于涂层/Cr2O3界面结合好,应力释放较小.降温冷却过程中,通过微晶涂层的蠕变使部分氧化膜热应力得以释放.

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