Oxidation behaviour of the nickel-based superalloy DZ125 hot-dipped with Al coatings doped by Si

被引：40
|
作者：
Zang, Junjie [1 ]
Song, Peng [1 ]
Feng, Jing [1 ]
Xiong, Xiping [1 ]
Chen, Rong [1 ]
Liu, Guangliang [1 ]
Lu, Jiansheng [1 ]
机构：
[1] Kunming Univ Sci & Technol, Fac Mat Sci & Engn, Kunming 650093, Peoples R China
来源：
CORROSION SCIENCE | 2016年 / 112卷
基金：
中国国家自然科学基金;
关键词：
Metal coatings; Superalloys; SEM; XRD; Oxidation; SINGLE-CRYSTAL SUPERALLOY; CYCLIC OXIDATION; PACK CEMENTATION; STAINLESS-STEEL; MICROSTRUCTURE; RESISTANCE; ALLOY; CODEPOSITION; SILICON;
D O I：
10.1016/j.corsci.2016.07.020
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A pure Al coating and Al-Si coating were prepared on the surface of the DZ125 superalloy by hot-dipping. The Al-Si coating provides better thermal oxidation resistance than that of the pure Al coating due to the formation of a more compact Al2O3 layer. The microstructure of the Al-Si coating shows a silicon aluminium-based layer with Ta5Si3 and AIHfSi phase forms after heat treatment in argon at 850 degrees C. This layer is a barrier to the diffusion of oxygen and other metal elements during cyclic oxidation, which has a significant effect on the formation of the compact Al2O3 layer. (C) 2016 Elsevier Ltd. All rights reserved.
引用
收藏
页码：170 / 179
页数：10
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