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利用磁控溅射技术在铸造Ni-16Co-26Cr-10Al合金上溅射了相同成分的纳米晶涂层,并进行900℃热腐蚀实验,结果表明:溅射Ni-16Co-26Cr-10Al纳米晶涂层由于晶粒尺寸细小,促进了保护性氧化物形成元素Al沿原“短路扩散通道-晶界”向氧化前沿的扩散,从而促进了保护性Al2O3的快速形成,使得溅射Ni-16Co-26Cr-10Al纳米晶涂层表现出比M38合金更优异的抗热腐蚀性能。
The same composition of nanocrystalline coating was sputtered on the cast Ni-16Co-26Cr-10Al alloy by magnetron sputtering and the thermal corrosion test was carried out at 900 ℃. The results show that the nanocrystalline Ni-16Co-26Cr-10Al nanocrystalline Due to the fine grain size, the coating promotes the diffusion of the protective oxide forming element Al along the original “short-circuit diffusion channel-grain boundary” to the oxidation front, so as to promote the rapid formation of protective Al2O3 so that the sputtered Ni- The 16Co-26Cr-10Al nanocrystalline coating shows more excellent hot corrosion resistance than the M38 alloy.