Significant reduction in friction and wear of a high-entropy alloy via the formation of self-organized nanolayered structure
来源期刊：JOURNAL OF MATERIALS SCIENCE TECHNOLOG2021年第14期
论文作者：Lu Yang Zhuo Cheng Weiwei Zhu Cancan Zhao Fuzeng Ren
摘 要：Sliding wear-induced nanolayering and its positive impact on wear resistance have been observed in conventional binary alloys with a matrix of high stacking fault energy （SFE）,but this concept has never been reported in high-entropy alloys （HEAs） with low SFE.Here,we design and fabricate a （CoCrFeNi）90Ag10HEA,consisting of a face-center-cubic （fcc） CoCrFeNi HEA matrix with low SFE and uniformly dispersed Ag precipitates.In comparison with CoCrFeNi,a significant reduction in friction and wear was found in （CoCrFeNi）90Ag10HEA through the spontaneous formation of nanolayered subsurface microstructure during wear.The finding suggests a novel approach for designing HEAs that can achieve low friction and wear.
Lu Yang1，Zhuo Cheng1，Weiwei Zhu1,2，Cancan Zhao1，Fuzeng Ren1
1. Department of Materials Science and Engineering, Southern University of Science and Technology2. Institute of Applied Physics and Materials Engineering, Faculty of Science & Technology, University of Macau
摘 要：Sliding wear-induced nanolayering and its positive impact on wear resistance have been observed in conventional binary alloys with a matrix of high stacking fault energy （SFE）,but this concept has never been reported in high-entropy alloys （HEAs） with low SFE.Here,we design and fabricate a （CoCrFeNi）90Ag10HEA,consisting of a face-center-cubic （fcc） CoCrFeNi HEA matrix with low SFE and uniformly dispersed Ag precipitates.In comparison with CoCrFeNi,a significant reduction in friction and wear was found in （CoCrFeNi）90Ag10HEA through the spontaneous formation of nanolayered subsurface microstructure during wear.The finding suggests a novel approach for designing HEAs that can achieve low friction and wear.
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