Chromium and iridium effects on the short-term interdiffusion behaviour between Pt rich γ-γ′ bond-coatings and a Ni-Al-Cr alloy

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• 作者：Pauline Audigié ; ^a ; ¹ ; Auré ; lie Rouaix-Vande Put^a ; Hideyuki Murakami^b ; Daniel Monceau^a ; ^{daniel.monceau@ensiacet.fr}
• 关键词：Interdiffusion modelling ; Bond-coatings ; Ni-Al-Cr alloys ; Platinum ; Iridium
• 刊名：Surface and Coatings Technology
• 出版年：2017
• 出版时间：15 January 2017
• 年：2017
• 卷：309
• 期：Complete
• 页码：258-265
• 全文大小：2089 K
• 卷排序：309

文摘

Cr addition increases the uphill Al diffusion to the surface during the interdiffusion of Pt / γ-(Ni,Al,Cr) at 1100 °C. Al and Cr have a positive chemical sinteraction in presence of Pt. Pt has a negative chemical interaction with Al and Cr in such a way that Pt decreases their activities. Ir slows down the interdiffusion of Pt-Ir / γ-(Ni,Al,Cr) at 1100 °C and decreases the Pt effect on Al activity by dilution.