Tribological behaviors of CrN/Cr3C2-NiCr duplex coating at elevated temperatures | |
Wensheng Li, Pengjun Tang, Lunling Shang, Dongqing He, Liping Wang, Guangan Zhang, Keyu Jin | |
刊名 | Surface & Coatings Technology |
2019-08-22 | |
卷号 | 378期号:无页码:124926 |
关键词 | Duplex coating Tribological behaviors Elevated temperatures Wear mechanisms |
ISSN号 | 0257-8972 |
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 H-3/E-2 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 degrees 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 degrees 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 degrees C to 550 degrees C). |
URL标识 | 查看原文 |
WOS研究方向 | Materials Science ; Physics |
语种 | 英语 |
出版者 | ELSEVIER SCIENCE SA |
WOS记录号 | WOS:000503100800027 |
内容类型 | 期刊论文 |
源URL | [http://ir.lut.edu.cn/handle/2XXMBERH/110584] |
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 |
通讯作者 | Wensheng Li, Pengjun Tang, Lunling Shang, Dongqing He, Liping Wang, Guangan Zhang, Keyu Jin |
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.Boteli Valve Group Co., Ltd., Wenzhou 325102, China 4.School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, China |
推荐引用方式 GB/T 7714 | Wensheng Li, Pengjun Tang, Lunling Shang, Dongqing He, Liping Wang, Guangan Zhang, Keyu Jin. Tribological behaviors of CrN/Cr3C2-NiCr duplex coating at elevated temperatures[J]. Surface & Coatings Technology,2019,378(无):124926. |
APA | Wensheng Li, Pengjun Tang, Lunling Shang, Dongqing He, Liping Wang, Guangan Zhang, Keyu Jin.(2019).Tribological behaviors of CrN/Cr3C2-NiCr duplex coating at elevated temperatures.Surface & Coatings Technology,378(无),124926. |
MLA | Wensheng Li, Pengjun Tang, Lunling Shang, Dongqing He, Liping Wang, Guangan Zhang, Keyu Jin."Tribological behaviors of CrN/Cr3C2-NiCr duplex coating at elevated temperatures".Surface & Coatings Technology 378.无(2019):124926. |
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