Influence of diffusion regimes on duplex platinum-aluminum coating on nickel based superalloy

doi:10.13251/j.issn.0254-6051.2025.01.050

Abstract

Abstract: The duplex platinum-aluminum coatings were prepared by electroplating platinum, vacuum diffusion and embedded aluminization. Effects of different diffusion and annealing treatments on the thickness, element content and hardness of the duplex platinum-aluminum coatings were studied. The results show that the Pt content of the outer layer decreases with the increase of diffusion temperature, the Al content slowly increases with the increase of diffusion temperature, the hardness of the outer layer of the coatings slowly decreases with the increase of diffusion temperature, and the hardness of the middle layer does not change much. At the same time, adding annealing treatment after coating preparation can reduce the hardness of the outer layer of the duplex platinum-aluminum coatings and decrease the brittleness of the coatings.

Key words: diffusion regime, platinum-aluminum coating, brittleness

CLC Number:

TG172.82

Si Yan, Wu Yeqiong, Chao Guotao, Li Jie, Huang Xuanxuan, Guo Shuangquan, Li Shuguang. Influence of diffusion regimes on duplex platinum-aluminum coating on nickel based superalloy[J]. Heat Treatment of Metals, 2025, 50(1): 332-336.

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Influence of diffusion regimes on duplex platinum-aluminum coating on nickel based superalloy

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