Influence of superalloy substrate roughness on adhesion and oxidation behavior of magnetron-sputtered NiCoCrAlY coatings
作者： Zhiming Li , Shiqiang Qian , Wei Wang
DOI: 10.1016/J.APSUSC.2011.06.120
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摘要: Abstract The present study has been conducted in order to determine the influence of superalloy substrate roughness on adhesion and oxidation behavior magnetron-sputtered NiCoCrAlY coatings. Six types coating samples with different were tested. surface real area both substrates coatings studied by atomic force microscopy (AFM) techniques. scratch tests performed at progressive loads employed evaluate Cyclic 1100 °C air for 50 cycles, each cycle consisting 1 h heating tube furnace followed 15 min cooling open air. AFM measurements exhibit that sputtered increases increasing roughness. slightly lower than corresponding substrate. indicate a smoother possess better those rougher surface. Both weight gain decrease decreasing provides relatively higher antioxidant protection provided
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