The scaling behavior of sputtered Ni₃Al coatings with and without Pt modification

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• 作者：Jianmin Niu ^{jmniu@imr.ac.cn} ; Wen Wang ; ^{wen@imr.ac.cn} ; Shenglong Zhu ^{slzhu@imr.ac.cn} ; Fuhui Wang ^{fhwang@imr.ac.cn}
• 关键词：A. Platinum ; A. Sputtered films ; B. SEM ; B. XRD ; C. Oxidation
• 刊名：Corrosion Science
• 出版年：2012
• 期刊代码：28_0010938x
• 类别：ch
• 出版时间：May, 2012
• 卷：58
• 期：Complete
• 页码：115-120
• 文件大小：1336 K

摘要

A Ni₃Al nanocrystalline film was deposited on the Ni₃Al-based superalloy IC6 by magnetron sputtering. Pt-modified coatings were obtained by electroplating 1.5 渭m platinum onto the sputtered Ni₃Al film with and without annealing. Duplex scale developed on the sputtered Ni₃Al film after 20 h isothermal exposure at 1050 掳C. Uphill diffusion of Al occurred in the Pt-modified coating system, which implied that inward diffusion of Al from coating to substrate was prevented. Platinum promoted selective oxidation of Al, although 5 at.%Pt was insufficient for the development of exclusive alumina scale on the Pt-modified sputtered 纬鈥?Ni₃Al coating.