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

页码：170 / 179

页数：10

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