Comparative Study of Hot Corrosion Behavior of the Enamel Based Composite Coatings and the Arc Ion Plating NiCrAlY on TiAl Alloy

doi:10.11900/0412.1961.2018.00293

IMR OpenIR

	Comparative Study of Hot Corrosion Behavior of the Enamel Based Composite Coatings and the Arc Ion Plating NiCrAlY on TiAl Alloy
	Liao Yimin 1; Feng Min 1; Chen Minghui 1; Geng Zhe 2; Liu Yang 3; Wang Fuhui 1; Zhu Shenglong 3
通讯作者	Chen Minghui(mhchen@mail.neu.edu.cn)
	2019-02-11
发表期刊	ACTA METALLURGICA SINICA
ISSN	0412-1961
卷号	55 期号:2 页码:229-237
摘要	TiAl intermetallic alloys have attracted great attention for its potential application in preparing low pressure turbine blades in aircraft engine. However, its poor oxidation and corrosion resistance becomes a challenge at temperatures above 800 degrees C, which leads to the developing of protective coatings. Enamel coating is considered as one of the candidates that match the TiAl alloy well, meanwhile provide corrosion protection. Enamel coating has many advantages such as high thermochemical stability, adjustable thermal expansion coefficient and simple preparation process. This study comparatively investigates hot corrosion behavior of the Ti-45Al-2Mn-2Nb alloy, the traditional NiCrAlY coating and the enamel based composite coating in (75%Na2SO4+25%NaCl, mass fraction) melted salt. Results indicate that after 80 h of hot corrosion, the bare alloy has completely destroyed. For the NiCrAlY coating, it protects the underlying alloy well by forming a protective Al2O3 scale initially. However, serious interdiffusion between coating and substrate results in the degeneration of the coating as well as the scale. At the same time, the basic dissolution of Al2O3 film accelerates corrosion. So obvious spallation takes place after 60 h corrosion. The enamel based composite coating shows excellent thermal stability and low corrosion rate. During the whole hot corrosion test, it still retains its original blue glazing color and luster. Furthermore, the enamel coating suppresses the inward diffusion of oxygen and corrosive ions into the alloy substrate, and thus, it protects the TiAl alloy well from corrosion of the molten (75%Na2SO4+25%NaCl, mass fraction) salt.
关键词	enamel coating hot corrosion NiCrAlY coating TiAl alloy
资助者	National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities ; Natural Science Foundation of Jiangsu Province of China ; Natural Science Foundation of Jiangsu Higher Education Institutions
DOI	10.11900/0412.1961.2018.00293
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[51471177] ; National Natural Science Foundation of China[51871051] ; Fundamental Research Funds for the Central Universities[N160205001] ; Natural Science Foundation of Jiangsu Province of China[BK20160353] ; Natural Science Foundation of Jiangsu Higher Education Institutions[16KJB460032]
WOS研究方向	Metallurgy & Metallurgical Engineering
WOS类目	Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000455945800007
出版者	SCIENCE PRESS
引用统计	被引频次：8[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/321006/131203
专题	中国科学院金属研究所
通讯作者	Chen Minghui
作者单位	1.Northeastern Univ, Shenyang Natl Key Lab Mat Sci, Shenyang 110819, Liaoning, Peoples R China 2.Suzhou Inst Ind Technol, Dept Precis Mfg Engn, Suzhou 215104, Peoples R China 3.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China
推荐引用方式 GB/T 7714	Liao Yimin,Feng Min,Chen Minghui,et al. Comparative Study of Hot Corrosion Behavior of the Enamel Based Composite Coatings and the Arc Ion Plating NiCrAlY on TiAl Alloy[J]. ACTA METALLURGICA SINICA,2019,55(2):229-237.
APA	Liao Yimin.,Feng Min.,Chen Minghui.,Geng Zhe.,Liu Yang.,...&Zhu Shenglong.(2019).Comparative Study of Hot Corrosion Behavior of the Enamel Based Composite Coatings and the Arc Ion Plating NiCrAlY on TiAl Alloy.ACTA METALLURGICA SINICA,55(2),229-237.
MLA	Liao Yimin,et al."Comparative Study of Hot Corrosion Behavior of the Enamel Based Composite Coatings and the Arc Ion Plating NiCrAlY on TiAl Alloy".ACTA METALLURGICA SINICA 55.2(2019):229-237.