Superior high-temperature wear resistance of an Ir-Ta-Ni-Nb bulk metallic glass  

作　　者：Fei Sun Shengtao Deng Jianan Fu Jiahua Zhu Dandan Liang Pengfei Wang Hang Zhao Feng Gong Jiang Ma Yanhui Liu Jun Shen 

机构地区：[1]Shenzhen Key Laboratory of High Performance Nontraditional Manufacturing,College of Mechatronics and Control Engineering,Shenzhen University,Shenzhen 518060,China [2]Shenzhen Key Laboratory of Cross-scale Manufacturing Mechanics Southern University of Science and Technology,Shenzhen 518055,China [3]Shanghai Engineering Research Center of Physical Vapor Deposition(PVD)Superhard Coating and Equipment,Shanghai Institute of Technology,Shanghai 201418,China [4]Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China

出　　处：《Journal of Materials Science & Technology》2023年第27期121-132,共12页材料科学技术（英文版）

基　　金：financially supported by the National Key Research and Development Program of China(Grant No.2018YFA0703605);the Key Basic and Applied Research Pro-gram of Guangdong Province,China(Grant No.2019B030302010);the NSF of China(Grant No.52122105,51971150);the Science and Technology Innovation Commission Shenzhen(Grants No.RCJC20221008092730037,20220804091920001)。

摘　　要：Wear resistance is a critical consideration in engineering applications.In this study,we demonstrated an Ir-Ta-Ni-Nb bulk metallic glass(BMG)with outstanding high-temperature wear resistance and revealed its promising applications in extreme environments.The wear behavior and mechanism were systemati-cally investigated from room temperature(RT)to 750℃.The results show that the wear rate increases from∼2.65×10^(-6)mm^(3)N^(-1)m^(-1)to∼10.56×10^(-6)mm^(3)N^(-1)m^(-1)in the temperature span RT to 400℃,following abrasive wear and flash temperature-induced oxidative wear during the friction.However,at the higher temperature of 600℃,further heating due to frictional heat leads to a softening of the wear surface,resulting in a maximum wear rate of∼20.99×10^(-6)mm^(3)N^(-1)m^(-1)under softness-driven abrasive wear as well as oxidative wear.Interestingly,the wear resistance at an even higher temperature of 750℃shows a paradoxical improvement of∼7.08×10^(-6)mm^(3)N^(-1)m^(-1),which is attributed to the formation of an oxide layer with a thickness of several microns,avoiding violent wear of BMG.The re-sults demonstrate the unreported outstanding high-temperature wear resistance of the Ir-Ta-Ni-Nb BMG,especially its excellent capability to resist wear at 750℃,leading to the promising applications of BMG in the fields of aerospace,metallurgy,and nuclear industries.

关 键 词：High-temperature alloy Superior wear resistance Wear mechanisms Bulk metallic glass 

分 类 号：TG139.8[一般工业技术—材料科学与工程]