| ZHOU Shenghao,ZHOU Xiaohui,WANG Zhenyu,WANG Rujia,MA Guanshui,WANG Aiying,KE Peiling.Effect of Ni Content on Wear Resistance Performance of CrN Coatings[J],53(11):45-58 |
| Effect of Ni Content on Wear Resistance Performance of CrN Coatings |
| Received:January 22, 2024 Revised:May 24, 2024 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2024.11.004 |
| KeyWord:Ni content CrNiN coatings dry friction simulated seawater solution tribocorrosion abrasive wear |
| Author | Institution |
| ZHOU Shenghao |
School of Materials Science and Chemical Engineering, Ningbo University, Zhejiang Ningbo , China;Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Zhejiang Ningbo , China |
| ZHOU Xiaohui |
Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Zhejiang Ningbo , China |
| WANG Zhenyu |
Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Zhejiang Ningbo , China |
| WANG Rujia |
Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Zhejiang Ningbo , China |
| MA Guanshui |
Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Zhejiang Ningbo , China |
| WANG Aiying |
Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Zhejiang Ningbo , China;Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing , China |
| KE Peiling |
Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Zhejiang Ningbo , China;Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing , China |
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| Abstract: |
| Seawater is a complex corrosive electrolyte solution. Chloride ions can cause severe damage to the oxide film on the metal surface, accelerating the corrosion process of materials. Metals serving in marine environments experience severe coupled corrosion and wear damage. However, these components are prone to corrosion and wear in marine environments, leading to the destruction of the surface's passive film and severe damage to the metal under the combined action of wear and corrosion. To protect alloys in marine conditions from the erosion of friction, metal nitride coatings have been widely applied to alloy surfaces in recent years. These coatings exhibit significant advantages in improving substrate thermal stability, oxidation resistance, and corrosion resistance. CrN coatings have been widely used in cutting tools and molds due to their excellent mechanical properties, corrosion resistance, and oxidation resistance. However, the low toughness of CrN coatings may lead to catastrophic failure through brittle detachment during frictional processes, severely limiting their application scenarios. Studies have shown that the addition of nickel (Ni) elements to CrN coatings can effectively improve their hardness and toughness. Currently, there are few reports on the tribological performance of CrNiN coatings in simulated seawater environments. The aim of this study was to investigate the influence of nickel addition on the wear resistance of CrN coatings in simulated marine environments and explore the wear behavior of CrNiN coatings with different nickel contents. Magnetron sputtering was used to control the nickel content in CrNiN coatings. CrN coatings with a thickness of 3 μm and different nickel contents, 15.85at.% and 39.06at.%, were prepared on 431 stainless steel substrates. Dry friction experiments and simulated seawater wear tests were conducted to study the mechanical properties and wear behavior of the three kinds of coatings and analyze their frictional damage mechanisms. Under dry friction conditions, the tribological performance of CrNiN coatings was mainly determined by the mechanical properties of the coatings. CrNiN coatings with 15.85at.% nickel content exhibited both high hardness and good toughness, resulting in the shallowest wear track and the lowest wear rate among the three kinds of coatings, with a value of 9.1×10–7 mm3/(N.m). However, under the open circuit potential (OCP) of simulated seawater wear, CrNiN coatings with the best mechanical properties had a higher wear rate than CrN coatings. CrN coatings exhibited the lowest friction coefficient and wear rate. The wear rate of the three kinds of coatings at a positive potential (+0.6 V) was much higher than that at the OCP, indicating that corrosion reduced the wear resistance of the coatings. Analysis of the corrosion products revealed that the main corrosion products of CrN were CrO2 and Cr2O3, which provided some lubrication effect. In contrast, the corrosion process of CrNiN coatings containing nickel produced NiO, which had an adverse effect on the wear resistance of the coatings. In conclusion, under dry friction conditions, the tribological performance of CrNiN coatings is mainly determined by the mechanical properties of the coatings. CrNiN coatings with 15.85at.% nickel content exhibited high hardness and good toughness, resulting in better wear resistance. However, under simulated seawater wear conditions, the corrosion products significantly affect the wear performance of CrNiN coatings, thereby reducing their wear resistance. |
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