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 2; Liang, Bunv 1
刊名	TRIBOLOGY LETTERS
	2010-02
卷号	37 期号:2 页码:141-148
关键词	Coating Thermal spray Microstructure Lanthanum oxide Wear resistance
ISSN号	1023-8883
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)(23)C-6 and Cr7C3, cellular-dendrite Fe-23(C, B)(6), gamma-Ni + Ni5Si2 interdendritic lamellar eutectic. Interestingly, significant amounts of net-like (Cr, Fe)(23)C-6 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.
资助项目	Natural Science Foundation of the Gansu province of China[0710RJZA071]
WOS研究方向	Engineering
语种	英语
出版者	SPRINGER/PLENUM PUBLISHERS
WOS记录号	WOS:000274222300005
状态	已发表
内容类型	期刊论文
源URL	[http://119.78.100.223/handle/2XXMBERH/35286]
专题	兰州理工大学
通讯作者	Zhang, Zhenyu
作者单位	1.Lanzhou Polytech Coll, Dept Mech Engn, Lanzhou 730050, Gansu, Peoples R China 2.Lanzhou Univ Technol, State Key Lab New Nonferrous Met Mat, Lanzhou 730050, Gansu, Peoples R 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.