Enhanced oxidation resistance of an AlSi alloy coating via Cr barrier layer insertion

doi:10.1016/j.surfcoat.2022.128836

IMR OpenIR

	Enhanced oxidation resistance of an AlSi alloy coating via Cr barrier layer insertion
	Liu, Tianxin 1; Wang, Zhiguo 1; Xiang, Lin 2; Zhao, Yanhui 3; Tao, Jianquan 2; Hu, Suying 1; Huang, Bo 2; Xie, Zhiwen 1
通讯作者	Zhao, Yanhui(yhzhao@imr.ac.cn) ; Xie, Zhiwen(xzwustl@126.com)
	2022-10-15
发表期刊	SURFACE & COATINGS TECHNOLOGY
ISSN	0257-8972
卷号	447 页码:13
摘要	A novel Cr barrier layer was designed for suppressing the interdiffusion of an AlSi alloy coating on stainless steel. Without a Cr barrier layer, the same coating experienced a severe element interdiffusion upon exposure to high-temperature air. The rapid upward movement of the Fe atoms induced the formation of the (FeAl + Fe2Al5) alloy compounds and eventually led to severe volume shrinkage and the ultimate fracture of coating. The significant downward diffusion of the (Al + Si) atoms not only triggered numerous pores but also induced the accumulation of the FeAl alloy compound in the substrate resulting in extreme interfacial cracking. In contrast, a diffusion barrier layer comprising (Cr2O3 + SiO2) and Al2O3 was formed in the coating with a Cr layer during high-temperature exposure, effectively preventing the rapid elemental interdiffusion. Moreover, it inhibited the for-mation of the (FeAl + Fe2Al5) alloy compounds in the coating as well as prevented the accumulation of the FeAl in the substrate. The obvious upward diffusion of Cr atoms further healed these pores induced by the downward diffusion of (Al + Si) atoms. The strong barrier capability of this composite oxide layer and the healing effect of Cr diffusion eventually led to an improved oxidation resistance of the Cr-coated layer. Superscript/Subscript Available
关键词	Stainless steel Coating Oxidation resistance Diffusion barrier layer Healing effect
DOI	10.1016/j.surfcoat.2022.128836
收录类别	SCI
语种	英语
WOS研究方向	Materials Science ; Physics
WOS类目	Materials Science, Coatings & Films ; Physics, Applied
WOS记录号	WOS:000859607500002
出版者	ELSEVIER SCIENCE SA
引用统计	被引频次：2[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/176089
专题	中国科学院金属研究所
通讯作者	Zhao, Yanhui; Xie, Zhiwen
作者单位	1.Univ Sci & Technol Liaoning, Anshan 114051, Peoples R China 2.Southwest Technol & Engn Res Inst, Chongqing 400039, Peoples R China 3.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Liu, Tianxin,Wang, Zhiguo,Xiang, Lin,et al. Enhanced oxidation resistance of an AlSi alloy coating via Cr barrier layer insertion[J]. SURFACE & COATINGS TECHNOLOGY,2022,447:13.
APA	Liu, Tianxin.,Wang, Zhiguo.,Xiang, Lin.,Zhao, Yanhui.,Tao, Jianquan.,...&Xie, Zhiwen.(2022).Enhanced oxidation resistance of an AlSi alloy coating via Cr barrier layer insertion.SURFACE & COATINGS TECHNOLOGY,447,13.
MLA	Liu, Tianxin,et al."Enhanced oxidation resistance of an AlSi alloy coating via Cr barrier layer insertion".SURFACE & COATINGS TECHNOLOGY 447(2022):13.