{"title":"高温下Al、Ti和纳米hbn改性CoCrFeMnNi高熵合金复合材料的显微组织、力学和摩擦学性能增强","authors":"Wenbo Ma , Yubo Zhao , Magdalena Łępicka , Oleksandr Tisov","doi":"10.1016/j.wear.2025.206055","DOIUrl":null,"url":null,"abstract":"<div><div>This study investigates the microstructure, mechanical properties, and tribological performance against Si<sub>3</sub>N<sub>4</sub> ball of CoCrFeMnNi high-entropy alloy (HEA) matrix composites modified with 2 wt% Al, 2 wt% Ti, and varying nano-hBN contents. Spark plasma sintering (SPS) was employed to achieve grain refinement, the formation of Cr<sub>2</sub>B and TiN phases, and improved hardness and yield strength. The composites demonstrated exceptional wear resistance, especially at elevated temperatures. At 900 °C, a continuous oxide layer enhanced wear protection, while at room temperature (RT), the hBN lubrication film reduced wear. The 0.5 wt% hBN composite exhibited optimal performance, combining reduced wear rates, improved mechanical properties, and a consistent tribological response across a wide temperature range.</div></div>","PeriodicalId":23970,"journal":{"name":"Wear","volume":"572 ","pages":"Article 206055"},"PeriodicalIF":6.1000,"publicationDate":"2025-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Enhanced microstructure, mechanical, and tribological properties of Al, Ti, and nano-hBN-modified CoCrFeMnNi high-entropy alloy composites at elevated temperatures\",\"authors\":\"Wenbo Ma , Yubo Zhao , Magdalena Łępicka , Oleksandr Tisov\",\"doi\":\"10.1016/j.wear.2025.206055\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>This study investigates the microstructure, mechanical properties, and tribological performance against Si<sub>3</sub>N<sub>4</sub> ball of CoCrFeMnNi high-entropy alloy (HEA) matrix composites modified with 2 wt% Al, 2 wt% Ti, and varying nano-hBN contents. Spark plasma sintering (SPS) was employed to achieve grain refinement, the formation of Cr<sub>2</sub>B and TiN phases, and improved hardness and yield strength. The composites demonstrated exceptional wear resistance, especially at elevated temperatures. At 900 °C, a continuous oxide layer enhanced wear protection, while at room temperature (RT), the hBN lubrication film reduced wear. The 0.5 wt% hBN composite exhibited optimal performance, combining reduced wear rates, improved mechanical properties, and a consistent tribological response across a wide temperature range.</div></div>\",\"PeriodicalId\":23970,\"journal\":{\"name\":\"Wear\",\"volume\":\"572 \",\"pages\":\"Article 206055\"},\"PeriodicalIF\":6.1000,\"publicationDate\":\"2025-04-03\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Wear\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0043164825003242\",\"RegionNum\":1,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"ENGINEERING, MECHANICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Wear","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0043164825003242","RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, MECHANICAL","Score":null,"Total":0}
Enhanced microstructure, mechanical, and tribological properties of Al, Ti, and nano-hBN-modified CoCrFeMnNi high-entropy alloy composites at elevated temperatures
This study investigates the microstructure, mechanical properties, and tribological performance against Si3N4 ball of CoCrFeMnNi high-entropy alloy (HEA) matrix composites modified with 2 wt% Al, 2 wt% Ti, and varying nano-hBN contents. Spark plasma sintering (SPS) was employed to achieve grain refinement, the formation of Cr2B and TiN phases, and improved hardness and yield strength. The composites demonstrated exceptional wear resistance, especially at elevated temperatures. At 900 °C, a continuous oxide layer enhanced wear protection, while at room temperature (RT), the hBN lubrication film reduced wear. The 0.5 wt% hBN composite exhibited optimal performance, combining reduced wear rates, improved mechanical properties, and a consistent tribological response across a wide temperature range.
期刊介绍：
Wear journal is dedicated to the advancement of basic and applied knowledge concerning the nature of wear of materials. Broadly, topics of interest range from development of fundamental understanding of the mechanisms of wear to innovative solutions to practical engineering problems. Authors of experimental studies are expected to comment on the repeatability of the data, and whenever possible, conduct multiple measurements under similar testing conditions. Further, Wear embraces the highest standards of professional ethics, and the detection of matching content, either in written or graphical form, from other publications by the current authors or by others, may result in rejection.
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