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.
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。
作者简介
Corresponding authors at:Jeong Tae Kim,Hybrid Materials Center(HMC),Department of Nanotechnology and Advanced Materials Engineering,Sejong University,209,Neungdong-ro,Gwangjin-gu,Seoul,143-747,Republic of Korea.E-mail addresses:jeong.kim@oeaw.ac.at;Corresponding authors at:Ki Buem Kim,E-mail addresses:kbkim@sejong.ac.kr。
