New para-magnetic(CoFeNi)(50)(CrMo)(50-x)(CB)x(x=20,25,30)non-equiatomic high entropy metallic glasses with wide supercooled liquid region and excellent mechanical properties  

作　　者：Jeong Tae Kim Sung Hwan Hong Jin Man Park Jürgen Eckert Ki Buem Kim 

机构地区：[1]Erich Schmid Institute of Materials Science,Austrian Academy of Sciences(ÖAW),Jahnstrae 12,8700,Leoben,Austria [2]Hybrid Materials Center(HMC),Department of Nanotechnology and Advanced Materials Engineering,Sejong University,209,Neungdong-ro,Gwangjin-gu,Seoul,143-747,Republic of Korea [3]Global Technology Center(GTC),Samsung Electronics Co.,Ltd,129 Samsung-ro,Yeongtong-gu,Suwonsi,Gyeonggi-do,443-742,Republic of Korea [4]Department of Materials Science,Chair of Materials Physics,Montanuniversität Leoben,Jahnstraße 12,8700,Leoben,Austria

出　　处：《Journal of Materials Science & Technology》2020年第8期135-143,共9页材料科学技术（英文版）

基　　金：supported by the Technology Innovation Program(No.10063052,Development of advanced nano-micron coating material and coated cutting tool for Hard-to-Cut);funded By Ministry of Trade,Industry and Energy(MOTIE,Korea);the Basic Research Laboratory Program through the Ministry of Education of the Republic of Korea(No.2019R1A4A1026125);support through the European Research Council under the Advanced Grant“INTERLHYB”—Next Generation of Complex Metallic Materials in Intelligent Hybrid Structures”(No.ERC-2013-ADG-340025)is gratefully acknowledged。

摘　　要：In this study,high entropy metallic glasses(HEMGs)were developed through a combination of concepts for designing metallic glasses(main element+transition metal+metalloid element)and high-entropy alloys(more than five elements,each element having an atomic concentration between 5 at.%and 35 at.%).The developed metallic glass alloys are composed of Co-Fe-Ni main elements,transition metals(Cr,Mo)and metalloid elements(C,B).Moreover,the present work reports the thermal,mechanical and magnetic properties of(CoFeNi)(50)(CrMo)(50-x)(CB)x alloys with x=20,25,30.The developed as-spun HEMGs exhibit typical paramagnetic properties even for a high amount of ferromagnetic elements(Co,Fe,and Ni)and have high elastic modulus(103–160 GPa)and hardness(14–27 GPa),thus possessing mechanical properties similar to well-known Co-based metallic glasses(Co-Cr-Mo-C-B system).In addition,some of the bulk samples prepared with a diameter of 2 mm form bulk metallic glasses with a high compressive strength around 3.5 GPa.The mechanisms determining the stability of the supercooled liquid,as well as the paramagnetic and mechanical properties for the developed non-equiatomic HEMGs,are discussed.

关 键 词：Metallic glasses PARAMAGNETISM High entropy alloys Phase stability 

分 类 号：TG139.8[一般工业技术—材料科学与工程]