{"title":"通过红外蓝复合激光熔覆铜合金上的 CoCrFeNi-（Mo、Ti、W）高熵合金涂层的电学和载流摩擦学特性","authors":"","doi":"10.1016/j.surfcoat.2024.131337","DOIUrl":null,"url":null,"abstract":"<div><p>Infrared-blue composite laser cladding technology is used to prepare highly conductive and wear-resistant CoCrFeNi-(Mo, Ti, W) HEA coatings on the surface of the copper alloy to overcome the problem of high reflectivity of copper alloy aiming to enhance the surface performance of copper alloy current-carrying friction part. The microstructure and electrical properties of the high-entropy alloy coating were investigated. The wear resistance of the coatings was tested under high-speed and high-current conditions using a self-made current-carrying friction and wear testing machine. The results show that fine-grain and second-phase strengthening significantly enhances the hardness of the high-entropy alloy coating. The high-entropy alloy coating maintains the excellent electrical conductivity of the copper alloy, with an overall conductivity remaining above 60 % IACS. During the current-carrying friction process, the CoCrFeNi-(Mo, Ti, W) HEA coatings exhibited good wear resistance, with wear rates of 0.84 g/h, 1.08 g/h, and 1.32 g/h, respectively. The wear mechanisms observed included varying degrees of adhesive wear, abrasive wear, fatigue wear, and arc erosion.</p></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":null,"pages":null},"PeriodicalIF":5.3000,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Electrical and current-carrying tribological properties of CoCrFeNi-(Mo, Ti, W) high-entropy alloy coatings on copper alloys by infrared-blue composite laser cladding\",\"authors\":\"\",\"doi\":\"10.1016/j.surfcoat.2024.131337\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Infrared-blue composite laser cladding technology is used to prepare highly conductive and wear-resistant CoCrFeNi-(Mo, Ti, W) HEA coatings on the surface of the copper alloy to overcome the problem of high reflectivity of copper alloy aiming to enhance the surface performance of copper alloy current-carrying friction part. The microstructure and electrical properties of the high-entropy alloy coating were investigated. The wear resistance of the coatings was tested under high-speed and high-current conditions using a self-made current-carrying friction and wear testing machine. The results show that fine-grain and second-phase strengthening significantly enhances the hardness of the high-entropy alloy coating. The high-entropy alloy coating maintains the excellent electrical conductivity of the copper alloy, with an overall conductivity remaining above 60 % IACS. During the current-carrying friction process, the CoCrFeNi-(Mo, Ti, W) HEA coatings exhibited good wear resistance, with wear rates of 0.84 g/h, 1.08 g/h, and 1.32 g/h, respectively. The wear mechanisms observed included varying degrees of adhesive wear, abrasive wear, fatigue wear, and arc erosion.</p></div>\",\"PeriodicalId\":22009,\"journal\":{\"name\":\"Surface & Coatings Technology\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":5.3000,\"publicationDate\":\"2024-09-10\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Surface & Coatings Technology\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S025789722400968X\",\"RegionNum\":2,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"MATERIALS SCIENCE, COATINGS & FILMS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Surface & Coatings Technology","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S025789722400968X","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATERIALS SCIENCE, COATINGS & FILMS","Score":null,"Total":0}
Electrical and current-carrying tribological properties of CoCrFeNi-(Mo, Ti, W) high-entropy alloy coatings on copper alloys by infrared-blue composite laser cladding
Infrared-blue composite laser cladding technology is used to prepare highly conductive and wear-resistant CoCrFeNi-(Mo, Ti, W) HEA coatings on the surface of the copper alloy to overcome the problem of high reflectivity of copper alloy aiming to enhance the surface performance of copper alloy current-carrying friction part. The microstructure and electrical properties of the high-entropy alloy coating were investigated. The wear resistance of the coatings was tested under high-speed and high-current conditions using a self-made current-carrying friction and wear testing machine. The results show that fine-grain and second-phase strengthening significantly enhances the hardness of the high-entropy alloy coating. The high-entropy alloy coating maintains the excellent electrical conductivity of the copper alloy, with an overall conductivity remaining above 60 % IACS. During the current-carrying friction process, the CoCrFeNi-(Mo, Ti, W) HEA coatings exhibited good wear resistance, with wear rates of 0.84 g/h, 1.08 g/h, and 1.32 g/h, respectively. The wear mechanisms observed included varying degrees of adhesive wear, abrasive wear, fatigue wear, and arc erosion.
期刊介绍：
Surface and Coatings Technology is an international archival journal publishing scientific papers on significant developments in surface and interface engineering to modify and improve the surface properties of materials for protection in demanding contact conditions or aggressive environments, or for enhanced functional performance. Contributions range from original scientific articles concerned with fundamental and applied aspects of research or direct applications of metallic, inorganic, organic and composite coatings, to invited reviews of current technology in specific areas. Papers submitted to this journal are expected to be in line with the following aspects in processes, and properties/performance:
A. Processes: Physical and chemical vapour deposition techniques, thermal and plasma spraying, surface modification by directed energy techniques such as ion, electron and laser beams, thermo-chemical treatment, wet chemical and electrochemical processes such as plating, sol-gel coating, anodization, plasma electrolytic oxidation, etc., but excluding painting.
B. Properties/performance: friction performance, wear resistance (e.g., abrasion, erosion, fretting, etc), corrosion and oxidation resistance, thermal protection, diffusion resistance, hydrophilicity/hydrophobicity, and properties relevant to smart materials behaviour and enhanced multifunctional performance for environmental, energy and medical applications, but excluding device aspects.
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