Enhanced wear resistance in (CoCrNi)94Al3Ti3 medium-entropy alloy at high temperatures via nano-Al2O3 reinforcing phase - Details

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Abstract：

High-entropy　or　medium-entropy　alloys　are　emerging　as　promising　materials　for　high-temperature　applications　due　to　exceptional　properties.　In　this　study,　the　nano　Al2O3　reinforced　(CoCrNi)94Al3Ti3　medium-entropy　alloy　(MEA)　composites　were　prepared　using　spark　plasma　sintering　(SPS).　The　nanohardness　(7.0　GPa)　and　elastic　modulus　(255.3　GPa)　of　(CoCrNi)94Al3Ti3-2　wt%　Al2O3　(2AMEA)　are　notably　higher　than　MEA,　reducing　the　wear　rate　by　about　50%　at　25　and　400　°C　compared　to　the　MEA.　Meanwhile,　2AMEA　forms　a　continuous　strip-like　oxide　glaze　tribo-layer　at　800　°C,　porviding　excellent　antioxidative　and　tribological　properties.　This　study　proved　the　feasibility　of　enhancing　high-temperature　wear　resistance　of　medium-entropy　alloy　via　nano-Al2O3.　©　2024　Elsevier　Ltd

Keyword：

High temperature Medium-entropy alloys Nano-Al2O3 reinforcement ODS Wear mechanisms

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[ 1 ] [Yu K.]State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, China
[ 2 ] [Yu K.]Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China
[ 3 ] [Cheng J.]State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, China
[ 4 ] [Cheng J.]Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China
[ 5 ] [Cheng Q.]State Key Laboratory of Tribology in Advanced Equipment, Tsinghua University, Beijing, 100084, China
[ 6 ] [Geng Y.]State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, China
[ 7 ] [Zhu S.]State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, China
[ 8 ] [Liu M.]Fujian Provincial Key Laboratory of Terahertz Functional Devices and Intelligent Sensing, School of Mechanical Engineering and Automation, Fuzhou University, Fujian, Fuzhou, 350108, China
[ 9 ] [Wan S.]State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, China
[ 10 ] [Yang J.]State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, China
[ 11 ] [Yang J.]Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China

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Enhanced wear resistance in (CoCrNi)94Al3Ti3 medium-entropy alloy at high temperatures via nano-Al2O3 reinforcing phase
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Source ：

Tribology International

ISSN： 0301-679X

Year： 2024

Volume： 195

6 . 1 0 0

JCR@2023

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SCOPUS Cited Count： 2

ESI Highly Cited Papers on the List： 0 Unfold All

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30 Days PV： 2

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