Preparation and characterization of atmospheric plasma-sprayed NiCr/Cr3C2-BaF2 center dot CaF2 composite coating

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	Preparation and characterization of atmospheric plasma-sprayed NiCr/Cr3C2-BaF2 center dot CaF2 composite coating
	Huang, Chuanbing 1,2; Du, Lingzhong 1; Zhang, Weigang 1
刊名	SURFACE & COATINGS TECHNOLOGY
	2009-07-15
卷号	203 期号:20-21 页码:3058-3065
关键词	Plasma spray NiCr/Cr3C2-BaF2 center dot CaF2 Coated powders Solid lubricant Tribological properties Wear mechanism
ISSN号	0257-8972
通讯作者	Huang, CB
英文摘要	NiCr alloy-coated BaF2 center dot CaF2 eutectic and Cr3C2 powders were respectively prepared by both pressurized hydrogen reduction and solid state alloying technology. Using this NiCr/Cr3C2-BaF2 center dot CaF2 composite powder, a derived coating was produced by atmospheric plasma spray (APS) technology. Microstructures and phase compositions of the powders, as well as the deposited coating, were analyzed by scanning electron microscopy (SEM) and X-ray diffraction (XRD). The friction and wear behavior of the coatings from ambient temperature to 800 degrees C was evaluated using a ball-on-disk tribometer. The results show that the NiCr/Cr3C2-BaF2 center dot CaF2 composite coating exhibited low porosity, high microhardness and high cohesive strength, which result in good friction reduction and excellent anti-wear ability at elevated temperatures up to 800 degrees C. The friction coefficient of NiCr/Cr3C2-BaF2 center dot CaF2 coating decreases with increasing temperature. The wear rates of both coating and couple balls are significantly lower at temperatures above 500 degrees C than those tested at room temperature. From the investigation of worn surfaces, it was concluded that brittle fracture and delamination were the dominant wear mechanisms of the coatings at low temperature. A transition stage from brittle to plastic state with decreased shear strength was observed for BaF2 center dot CaF2 eutectic at high temperatures, which resulted in the formation of a continuous lubricating layer in the wear track above 500 degrees C The excellent mechanical properties of the coating were partially attributed to the protection of NiCr layer of the composite powders which decreased the oxidation. decarburization and ablation of Cr3C2-BaF2 center dot CaF2 during spraying. (C) 2009 Elsevier B.V. All rights reserved.
WOS标题词	Science & Technology ; Technology ; Physical Sciences
类目[WOS]	Materials Science, Coatings & Films ; Physics, Applied
研究领域[WOS]	Materials Science ; Physics
关键词[WOS]	HIGH-TEMPERATURE ; WEAR BEHAVIOR ; TRIBOLOGICAL PROPERTIES ; CR3C2-NICR COATINGS ; SOLID LUBRICANTS ; FRICTION ; IMPROVEMENT ; OXIDATION ; SURFACE
收录类别	SCI
语种	英语
WOS记录号	WOS:000267632400013
公开日期	2013-12-06
内容类型	期刊论文
版本	出版稿
源URL	[http://ir.ipe.ac.cn/handle/122111/6635]
专题	过程工程研究所_多相复杂系统国家重点实验室
作者单位	1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Huang, Chuanbing,Du, Lingzhong,Zhang, Weigang. Preparation and characterization of atmospheric plasma-sprayed NiCr/Cr3C2-BaF2 center dot CaF2 composite coating[J]. SURFACE & COATINGS TECHNOLOGY,2009,203(20-21):3058-3065.
APA	Huang, Chuanbing,Du, Lingzhong,&Zhang, Weigang.(2009).Preparation and characterization of atmospheric plasma-sprayed NiCr/Cr3C2-BaF2 center dot CaF2 composite coating.SURFACE & COATINGS TECHNOLOGY,203(20-21),3058-3065.
MLA	Huang, Chuanbing,et al."Preparation and characterization of atmospheric plasma-sprayed NiCr/Cr3C2-BaF2 center dot CaF2 composite coating".SURFACE & COATINGS TECHNOLOGY 203.20-21(2009):3058-3065.