Influence of Pt-Al Coating on Hot Corrosion Resistance Behaviors of a Ni-Based Single-Crystal Superalloy

doi:10.11900/0412.1961.2020.00246

IMR OpenIR

	Influence of Pt-Al Coating on Hot Corrosion Resistance Behaviors of a Ni-Based Single-Crystal Superalloy
	Wang Di 1,2; Wang Dong 2; Xie Guang 2; Wang Li 2; Dong Jiasheng 2; Chen Lijia 1
通讯作者	Wang Di(diwang@imr.ac.cn)
	2021-06-01
发表期刊	ACTA METALLURGICA SINICA
ISSN	0412-1961
卷号	57 期号:6 页码:780-790
摘要	Pt-Al coating has been widely used in engine rotor blades because of its ability to improve the oxidation and hot corrosion resistance of Ni-based superalloys. However, the effect exerted by Pt on S and other refractory elements, as well as the rupture mechanisms, is under debate. To investigate the influence of Pt-Al coating on the corrosion resistance of single-crystal superalloy at high temperature, the hot corrosion test utilized Na2SO4 salt coated on the surface of the Pt-Al coating samples and the uncoated ones were carried out at 900 degrees C, respectively. Using several techniques, such as XRD, SEM, EDS, and EPMA, the influence of Pt-Al coating on the hot corrosion behaviors of a Ni-based single-crystal superalloy was analyzed. Moreover, the hot corrosion kinetics, hot corrosion products, and microstructure evolution during the process were analyzed. The results reveal that the hot corrosion resistance of the substrate alloy was enhanced by Pt-Al coating. The hot corrosion rate of the Pt-Al coating sample was lower than that of the uncoated one. Thus, it can be inferred that Pt-Al coating exhibited better hot corrosion resistance. Pt prevented the diffusion of S into the beta-(Ni, Pt)Al phase. The S atom was present at the oxide-metal interface, which reduced the hot corrosion rate of the substrate alloy. The presence of Pt in the beta-(Ni, Pt)Al obstructed the great mass of Ta in the inter diffusion zone, which led to the diffusion of only a small quantity of Ta atoms into the oxide, and reduced the formation of Ta2O5. Finally, Pt-Al coating was also found to restrain to some extent the void formation at the oxide-metal interface.
关键词	Pt-Al coating hot corrosion single-crystal superalloy Ni-based alloy
资助者	National Key Research and Development Program of China ; National Science and Technology Major Project ; National Natural Science Foundation of China
DOI	10.11900/0412.1961.2020.00246
收录类别	SCI
语种	英语
资助项目	National Key Research and Development Program of China[2016YFB0701403] ; National Science and Technology Major Project[2017-VI-0019-0091] ; National Science and Technology Major Project[2017-VI-0003-0073] ; National Science and Technology Major Project[2017-VI-00010070] ; National Natural Science Foundation of China[51771204] ; National Natural Science Foundation of China[U1732131] ; National Natural Science Foundation of China[51671196] ; National Natural Science Foundation of China[91860201] ; National Natural Science Foundation of China[51631008]
WOS研究方向	Metallurgy & Metallurgical Engineering
WOS类目	Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000657818600008
出版者	SCIENCE PRESS
引用统计	被引频次：4[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/321006/160376
专题	中国科学院金属研究所
通讯作者	Wang Di
作者单位	1.Shenyang Univ Technol, Sch Mat Sci & Engn, Shenyang 110870, Peoples R China 2.Chinese Acad Sci, Shi Changxu Innovat Ctr Adv Mat, Inst Met Res, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Wang Di,Wang Dong,Xie Guang,et al. Influence of Pt-Al Coating on Hot Corrosion Resistance Behaviors of a Ni-Based Single-Crystal Superalloy[J]. ACTA METALLURGICA SINICA,2021,57(6):780-790.
APA	Wang Di,Wang Dong,Xie Guang,Wang Li,Dong Jiasheng,&Chen Lijia.(2021).Influence of Pt-Al Coating on Hot Corrosion Resistance Behaviors of a Ni-Based Single-Crystal Superalloy.ACTA METALLURGICA SINICA,57(6),780-790.
MLA	Wang Di,et al."Influence of Pt-Al Coating on Hot Corrosion Resistance Behaviors of a Ni-Based Single-Crystal Superalloy".ACTA METALLURGICA SINICA 57.6(2021):780-790.