Tribological properties of AlCoCrFeNiCu high-entropy alloy in hydrogen peroxide solution and in oil lubricant |
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| Authors: | Haitao Duan Yong Wu Meng Hua Chengqing Yuan Ding Wang Jiesong Tu Hongchao Kou Jian Li |
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| Affiliation: | 1. Wuhan Research Institute of Materials Protection, 126 Bao Feng Er Lu, Wuhan, Hubei 430030, China;2. MBE Department, City University of Hong Kong, Kowloon, Hong Kong;3. Reliability Engineering Institute, School of Energy and Power Engineering, Wuhan University of Technology, Wuhan, Hubei, 430063, China;4. Northwestern Polytechnical University, 127 You Yi Xi Lu, Xi''an, Shaanxi 710072, China |
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| Abstract: | Pin-on-disc tests to investigate the tribological behavior of AlCoCrFeNiCu high-entropy alloy under lubrication conditions with 90% hydrogen peroxide solution and lubricant oil, respectively, were performed. The study demonstrates that the AlCoCrFeNiCu high-entropy alloy lubricated correspondingly with lubricant of 90% hydrogen peroxide solution (hereafter termed hydrogen peroxide lubricant) and lubricant oil significantly improves its friction and wear-resistance properties. Results showed that the friction coefficient, after a grinding stage, of the rubbing pair was lower than that with normal lubricant oil. The AlCoCrFeNiCu alloy in the lubricant with 90% hydrogen peroxide solution and lubricant oil exhibits a high resistance to wear. Analysis of the worn surface revealed that the AlCoCrFeNiCu high-entropy alloy lubricated with the hydrogen peroxide lubricant exhibited signs of inhomogeneous polishing oxidation and abrasive wear, with the wear mechanism changing with sliding distance, while the rubbing pair in normal lubricant oil is mainly dominated by abrasive wear. |
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