Microstructure and dry-sliding wear behavior of thermal sprayed and fused Ni-based coatings with the addition of La2O3

doi:10.1007/s11249-009-9502-y

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	Microstructure and dry-sliding wear behavior of thermal sprayed and fused Ni-based coatings with the addition of La2O3
	Zhang, Zhenyu 1,2; Wang, Zhiping 1; Liang, Bunv 2
刊名	Tribology Letters
	2010-02-01
卷号	37 期号:2 页码:141-148
关键词	Chromium compounds Coatings Dendrites (metallography) Friction Iron compounds Lanthanum alloys Lanthanum oxides Microstructure Nickel alloys Scanning electron microscopy Silicon compounds Sprayed coatings Thermal spraying Wear of materials Wear resistance Cellular dendrites Dry sliding wear Field emission gun scanning electron microscope Friction and wear Friction coefficients Lamellar eutectic Linear relationships Ni-based coatings
ISSN号	10238883
DOI	10.1007/s11249-009-9502-y
英文摘要	A Ni-based alloy with 1.5 wt% of La2O3 powders was thermal sprayed onto steel substrate. The microstructure and dry sliding wear behavior of the coatings were studied by XRD, field emission gun scanning electron microscope (FEGSEM) and SEM analyses. The microstructure of the coating with 1.5 wt% of La2O3 differs widely from the coating without La2O3; the typical microstructure with 1.5 wt% of La2O3 is composed of net-like dendrite (Cr, Fe) 23C6 and Cr7C3, cellular-dendrite Fe23(C, B)6, γ-Ni + Ni5Si2 interdendritic lamellar eutectic. Interestingly, significant amounts of net-like (Cr, Fe)23C6 and Cr7C3 hard phases as a wear-resistant skeleton were formed and uniformly dispersed in the coating. Meanwhile, blocky and rod-like hard-phase CrB scattered in the coating can also contribute to improving the wear resistance. The novel microstructure, therefore, is beneficial for wear resistance. Friction and wear tests without lubricant show that the friction coefficients of the coating are less than 0.57. There is an approximately linear relationship between friction coefficients and sliding speed. The wear rate slightly increases with an increase of load, and the wear rate of the coating slightly decreases with sliding speed. © 2009 Springer Science+Business Media, LLC.
WOS研究方向	Engineering
语种	英语
出版者	Springer New York LLC
WOS记录号	WOS:000274222300005
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/111391]
专题	兰州理工大学
作者单位	1.State Key Laboratory of New Nonferrous Metal Materials, Lanzhou University of Technology, Lanzhou, Gansu 730050, China 2.Mechanical Engineering Department, Lanzhou Polytechnical College, Lanzhou, Gansu 730050, China;
推荐引用方式 GB/T 7714	Zhang, Zhenyu,Wang, Zhiping,Liang, Bunv. Microstructure and dry-sliding wear behavior of thermal sprayed and fused Ni-based coatings with the addition of La2O3[J]. Tribology Letters,2010,37(2):141-148.
APA	Zhang, Zhenyu,Wang, Zhiping,&Liang, Bunv.(2010).Microstructure and dry-sliding wear behavior of thermal sprayed and fused Ni-based coatings with the addition of La2O3.Tribology Letters,37(2),141-148.
MLA	Zhang, Zhenyu,et al."Microstructure and dry-sliding wear behavior of thermal sprayed and fused Ni-based coatings with the addition of La2O3".Tribology Letters 37.2(2010):141-148.