【摘要】 对Ｎｉ－８Ｃｒ－３．５Ａｌ（质量分数，％）合金及其纳米晶涂层进行了１０００℃空气中高温氧化研究结果表明：Ｎｉ－８Ｃｒ－３．５Ａｌ纳米晶涂层的抗高温氧化性能优于 Ｎｉ－８Ｃｒ—３．５Ａｌ合金．这主要在于 Ｎｉ－－８Ｃｒ—３．５Ａｌ纳米晶涂层表面生成了具有分层结构含一连续ａ－Ａｌ２Ｏ３内层的氧化膜、而 Ｎｉ－８Ｃｒ—３．５Ａｌ合金则生成了由 Ｃｒ２Ｏ３外层和 Ａｌ２Ｏ３内氧化物组成的氧化膜．讨论了涂层氧化膜的生成过程更多还原

【Abstract】 The oxidation behaviors of cast Ni SCr--3.5Al(mass fraction,%) and its sputtered nanocrystalline coating at 1000 ℃ in air were investigated. The results showed that the sputtered Ni-8Cr--3.5Al nanocrystalline coating possesses better oxidation resistance than cast alloy, which is attributed to the formation of layered oxide scales composed of a continuous inner layer of α--Al2O3 on the sputtered coating. Whereas an outer layer of Cr2O3 and internal oxide of Al formed on cast Ni-8Cr--3.5Al alloy. The formation of oxide scales on the sputtered coating was discussed.更多还原