Tribological behaviors of CrN/Cr3C2-NiCr duplex coating at elevated temperatures

doi:10.1016/j.surfcoat.2019.124926

	Tribological behaviors of CrN/Cr3C2-NiCr duplex coating at elevated temperatures
	Li, Wensheng 2,3; Tang, Pengjun 2,3; Shang, Lunling 1,3; He, Dongqing 2,3; Wang, Liping 2; Zhang, Guangan 1; Jin, Keyu 4
刊名	Surface and Coatings Technology
	2019-11-25
卷号	378
关键词	Abrasion Adhesives Alumina Aluminum oxide Chromium compounds Friction Fuels HVOF thermal spraying Nickel compounds Sprayed coatings Thermal expansion Tribology Wear resistance Duplex coatings Elevated temperature Friction coefficients High velocity oxy fuel Load-bearing capacity Thermal shock resistance Tribological behaviors Wear mechanisms
ISSN号	02578972
DOI	10.1016/j.surfcoat.2019.124926
英文摘要	Duplex coating, composing of a thick Cr3C2-NiCr interlayer and a top CrN film, were deposited by high velocity oxy-fuel (HVOF) and arc ion plating technologies, and the microstructure, mechanical properties and thermal shock resistance of the duplex coating were investigated compared to those of the single CrN film, as well as tribological behaviors at elevated temperatures. Results showed that the duplex coating exhibited high surface hardness, H/E and H3/E2 ratios, load-bearing capacity and adhesive strength due to the supporting of the Cr3C2-NiCr interlayer, which contributed to improve the wear properties of duplex coating sliding against Al2O3 ball. At 25 °C, the duplex coating had a higher friction coefficient and a relatively low wear loss, and the main wear mechanism was abrasive wear. As the temperature increased to 350 °C, the top CrN film of duplex coating was worn out totally. The severe mismatch of coefficient of thermal expansion (CTE) between Cr3C2-NiCr interlayer and substrate that might have a negative impact on wear resistance of duplex coating at high temperature. In addition, a large number of debris produced due to oxidation peeling of the coatings were compacted to form a thick transfer film during the sliding process, resulting in badly adhesive wear. The wear mechanisms were adhesive and oxidation wear accompanied with abrasive wear at high temperature (from 150 °C to 550 °C). © 2019
WOS研究方向	Materials Science ; Physics
语种	英语
出版者	Elsevier B.V., Netherlands
WOS记录号	WOS:000503100800027
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/150597]
专题	材料科学与工程学院省部共建有色金属先进加工与再利用国家重点实验室
作者单位	1.State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou; 730000, China; 2.State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou; 730050, China; 3.School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou; 730050, China; 4.Boteli Valve Group Co., Ltd., Wenzhou; 325102, China
推荐引用方式 GB/T 7714	Li, Wensheng,Tang, Pengjun,Shang, Lunling,et al. Tribological behaviors of CrN/Cr3C2-NiCr duplex coating at elevated temperatures[J]. Surface and Coatings Technology,2019,378.
APA	Li, Wensheng.,Tang, Pengjun.,Shang, Lunling.,He, Dongqing.,Wang, Liping.,...&Jin, Keyu.(2019).Tribological behaviors of CrN/Cr3C2-NiCr duplex coating at elevated temperatures.Surface and Coatings Technology,378.
MLA	Li, Wensheng,et al."Tribological behaviors of CrN/Cr3C2-NiCr duplex coating at elevated temperatures".Surface and Coatings Technology 378(2019).