Hot corrosion behaviour of Al-Si-Dy coating on new γ′-strengthened cobalt-based alloy
Hot corrosion behaviour of Al-Si-Dy coating on new γ′-strengthened cobalt-based alloy
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DOI：
10.1016/j.corsci.2020.108431
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发表时间：
2020
期刊：
影响因子：
--
通讯作者：
Chungen Zhou
中科院分区：
文献类型：
--
作者：
Mingyue Chen;kanglu Feng;Meifeng Li;Chungen Zhou
Dy-Si-modified aluminide coating was deposited onto new γ′-strengthened cobalt-based superalloy by pack cementation technology. The coating is composed of an outer layer and a diffusion zone in thickness of around 70 μm and 11 μm, respectively. The outer layer consists mainly of AlCo containing Al5Co2 dispersoids. The weight gain of Al-Si-Dy coating after hot corrosion at 1173 K for 100 h is 0.36 mg/cm2. Al-Si-Dy coating shows better corrosion resistance by contrast with Al and Al-Si coating. The hot corrosion mechanisms of Al-Si-Dy coating is discussed in this study.
