Effect of operating voltage on microstructure and microhardness of NiCoCrAlYTa-Y2O3 composite coatings on single crystal superalloy produced by electrospark deposition

doi:10.1016/j.surfcoat.2018.11.066

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	Effect of operating voltage on microstructure and microhardness of NiCoCrAlYTa-Y2O3 composite coatings on single crystal superalloy produced by electrospark deposition
	Wang, De 2; Wang, Wenqin 3; Wang, Mingsheng 1; Li, Yulong 3; Chen, Xingui 2; Chi, Changtai 1; Xie, Yujiang 1
刊名	SURFACE & COATINGS TECHNOLOGY
	2019-01-25
卷号	358 页码:628-636
关键词	Electrospark deposition Metal matrix composite coating Single crystal superalloy NiCoCrAlYTa Epitaxial growth
ISSN号	0257-8972
DOI	10.1016/j.surfcoat.2018.11.066
通讯作者	Xie, Yujiang(yjxie@imr.ac.cn)
英文摘要	NiCoCrAlTTa-Y2O3 metal matrix composite coatings were prepared on single crystal superalloy by electrospark deposition (ESD) to improve the wear- and oxidation resistance. The effect of operating voltage during ESD on the deposit morphology, coating growth kinetics, microstructure and properties was investigated. The results showed that, with increasing operating voltage, the dimension (both diameter and depth) of single-pulse deposit increased, leading to thinner deposit thickness, thus resulting in higher cooling rate, finer grains, stronger crystal orientation, and increasing microhardness. Whereas the motion of the molten deposit metal became more turbulent, giving rise to the defect of lack of fusion. However, the grain size increased obviously from bottom layer to top layer for 100 V condition, leading to decreasing microhardness. Meanwhile, the mass gain rate increased but the mass transfer coefficient decreased with the increase of operating voltage. The distribution pattern of Y2O3 particles changed during electrospark deposition, from gathering in the boundary between the powders in the electrode to distributing homogeneously in the whole coating, which contributed to the increase of coating microhardness.
资助项目	National Key Research and Development Program of China[2016YFB1100203] ; Key Research and Development Program of Jiangxi Province[20171BBE50022] ; Key Research and Development Program of Jiangxi Province[20171ACE50018] ; Key Research and Development Program of Jiangxi Province[20171BEI90003] ; Key Research Project of Jiangxi Academy of Sciences[2016-YZD2-01]
WOS研究方向	Materials Science ; Physics
语种	英语
出版者	ELSEVIER SCIENCE SA
WOS记录号	WOS:000456762300074
资助机构	National Key Research and Development Program of China ; Key Research and Development Program of Jiangxi Province ; Key Research Project of Jiangxi Academy of Sciences
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/131431]
专题	金属研究所_中国科学院金属研究所
通讯作者	Xie, Yujiang
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China 2.Jiangxi Acad Sci, Inst Appl Phys, Nanchang 330029, Jiangxi, Peoples R China 3.Nanchang Univ, Sch Mech & Elect Engn, Nanchang 330031, Jiangxi, Peoples R China
推荐引用方式 GB/T 7714	Wang, De,Wang, Wenqin,Wang, Mingsheng,et al. Effect of operating voltage on microstructure and microhardness of NiCoCrAlYTa-Y2O3 composite coatings on single crystal superalloy produced by electrospark deposition[J]. SURFACE & COATINGS TECHNOLOGY,2019,358:628-636.
APA	Wang, De.,Wang, Wenqin.,Wang, Mingsheng.,Li, Yulong.,Chen, Xingui.,...&Xie, Yujiang.(2019).Effect of operating voltage on microstructure and microhardness of NiCoCrAlYTa-Y2O3 composite coatings on single crystal superalloy produced by electrospark deposition.SURFACE & COATINGS TECHNOLOGY,358,628-636.
MLA	Wang, De,et al."Effect of operating voltage on microstructure and microhardness of NiCoCrAlYTa-Y2O3 composite coatings on single crystal superalloy produced by electrospark deposition".SURFACE & COATINGS TECHNOLOGY 358(2019):628-636.