溅射Ni-8Cr-3.5Al纳米晶涂层的抗高温氧化行为  

OXIDATION BEHAVIOR OF THE SPUTTERED Ni-8Cr-3.5Al NANOCRYSTALINE COATING

作　　者：陈国锋[1] 楼翰一[1] 

机构地区：[1]中国科学院金属腐蚀与防护研究所金属腐蚀与防护国家重点实验室,沈阳110015

出　　处：《金属学报》2000年第1期59-61,共3页Acta Metallurgica Sinica

基　　金：国家自然科学基金!59671060

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．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.

关 键 词：溅射 纳米晶涂层 高温氧化 镍基 高温合金 

分 类 号：TG172.82[金属学及工艺—金属表面处理] TG146.15[金属学及工艺—金属学]