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

IMR OpenIR

	Effect of operating voltage on microstructure and microhardness of NiCoCrAlYTa-Y2O3 composite coatings on single crystal superalloy produced by electrospark deposition
	Wang, De 1; Wang, Wenqin 2; Wang, Mingsheng 3; Li, Yulong 2; Chen, Xingui 1; Chi, Changtai 3; Xie, Yujiang 3
通讯作者	Xie, Yujiang(yjxie@imr.ac.cn)
	2019-01-25
发表期刊	SURFACE & COATINGS TECHNOLOGY
ISSN	0257-8972
卷号	358 页码:628-636
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.
关键词	Electrospark deposition Metal matrix composite coating Single crystal superalloy NiCoCrAlYTa Epitaxial growth
资助者	National Key Research and Development Program of China ; Key Research and Development Program of Jiangxi Province ; Key Research Project of Jiangxi Academy of Sciences
DOI	10.1016/j.surfcoat.2018.11.066
收录类别	SCI
语种	英语
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
WOS类目	Materials Science, Coatings & Films ; Physics, Applied
WOS记录号	WOS:000456762300074
出版者	ELSEVIER SCIENCE SA
引用统计	被引频次：20[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/321006/131432
专题	中国科学院金属研究所
通讯作者	Xie, Yujiang
作者单位	1.Jiangxi Acad Sci, Inst Appl Phys, Nanchang 330029, Jiangxi, Peoples R China 2.Nanchang Univ, Sch Mech & Elect Engn, Nanchang 330031, Jiangxi, 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	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.