Oxide formation on sputtered Ni-3Cr-10Al nanocrystalline coating

来源期刊：中国有色金属学报(英文版)2000年第3期

论文作者：陈国锋 楼翰一

文章页码：397 - 400

Key words：Ni-3Cr-10Al; sputtering; nanocrystalline coating; oxidation

Abstract:

The oxide formation on the sputtered Ni-3Cr-10Al nanocrystalline coating at 900℃and 1 000℃in air has been studied. The results indicated that an oxide scale composed of NiAl₂O₄ and Al₂O₃ was formed on the sputtered Ni-3Cr-10Al nanocrystalline coating whereas a unitary Al₂O₃ scale was not formed even when the Al content was high in the sputtered coating. The formation of NiAl₂O₄was directly related to the precipitation of Ni₃Al in the coating during oxidation process. It was suggested that the precipitation of Ni₃Al contributed to the formation of NiO and therefore NiO could react with Al₂O₃ and form NiAl₂O₄. With increasing oxidation temperature, the effect of Ni₃Al precipitation on the formation of NiAl₂O₄decreased.