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

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EI Scopus SCIE

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　degrees　C　compared　to　the　MEA.　Meanwhile,　2AMEA　forms　a　continuous　striplike　oxide　glaze　tribo-layer　at　800　degrees　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.

Keyword：

High temperature Medium-entropy alloys Nano-Al 2 O 3 reinforcement ODS Wear mechanisms

Community：

[ 1 ] [Yu, Kaixuan]Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Peoples R China
[ 2 ] [Cheng, Jun]Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Peoples R China
[ 3 ] [Geng, Yushan]Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Peoples R China
[ 4 ] [Zhu, Shengyu]Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Peoples R China
[ 5 ] [Wan, Shanhong]Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Peoples R China
[ 6 ] [Yang, Jun]Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Peoples R China
[ 7 ] [Yu, Kaixuan]Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China
[ 8 ] [Cheng, Jun]Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China
[ 9 ] [Yang, Jun]Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China
[ 10 ] [Cheng, Qianqian]Tsinghua Univ, State Key Lab Tribol Adv Equipment, Beijing 100084, Peoples R China
[ 11 ] [Liu, Ming]Fuzhou Univ, Sch Mech Engn & Automat, Fujian Prov Key Lab Terahertz Funct Devices & Inte, Fuzhou 350108, Fujian, Peoples R China

Reprint 's Address：

[Wan, Shanhong]Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Peoples R China;;[Yang, Jun]Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Peoples R China;;

Email：

shwan@licp.cas.cn |
jyang@licp.cas.cn

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