CoCrFeNi高熵合金在金属氧化物熔盐电脱氧中的形成过程  

Formation Process of CoCrFeNi High Entropy Alloy via Electro-Deoxidization of Metal Oxides in Molten Salt

作　　者：杨宇 罗翔宇[1,2] 马通祥 胡丽文 温良英 扈玫珑[1,2] Yang Yu;Luo Xiangyu;Ma Tongxiang;Hu Liwen;Wen Liangying;Hu Meilong(College of Materials Science and Engineering,Chongqing University,Chongqing 400044,China;Chongqing Key Laboratory of Vanadium-Titanium Metallurgy and New Materials,Chongqing University,Chongqing 400044,China)

机构地区：[1]重庆大学材料科学与工程学院,重庆400044 [2]重庆大学钒钛冶金与新材料重庆市重点实验室,重庆400044

出　　处：《稀有金属材料与工程》2021年第9期3116-3124,共9页Rare Metal Materials and Engineering

基　　金：National Natural Science Foundation of China (51674054)

摘　　要：在1173 K下将金属氧化物在CaCl2熔盐中进行电脱氧,制备了CoCrFeNi高熵合金。通过X射线衍射(XRD)、扫描电子显微镜(SEM)和能量色散X射线能谱(EDS)研究了不同电解时间下金属氧化物转化为高熵合金的相变过程。结果表明,CoCrFeNi高熵合金的形成过程包括快速脱氧和深度脱氧2个阶段。在快速脱氧阶段,在1 h内去除了烧结氧化物球团中93.93%(质量分数)的氧,电流效率达到89.95%。电解结束后,产物的氧含量可达0.26%(质量分数),电流效率为17.93%。该高熵合金的形成过程可用于指导建立低成本、高效率的电化学路线。CoCrFeNi high entropy alloys(HEAs)were prepared by electro-deoxidization of metal oxides in CaCl2 molten salt at 1173 K.The phase transformation from the metal oxides to HEA under different electrolysis durations was investigated by X-ray diffraction(XRD),scanning electron microscopy(SEM),and energy dispersive X-ray spectroscopy(EDS).The results show that the formation process of CoCrFeNi HEA includes two stages:the rapid deoxidization stage and deep deoxidization stage.In the rapid deoxidization stage,93.93wt%oxygen in sintered oxide pellet is removed within 1 h and the current efficiency reaches 89.95%.After electrolysis of 15 h,the oxygen content of the product is 0.26wt%and the current efficiency is 17.93%.The formation process of CoCrFeNi HEA provides guidance for establishing the electrochemical route with low cost and high efficiency.

关 键 词：高熵合金 电脱氧 形成过程 氧含量 电流效率 

分 类 号：TG139[一般工业技术—材料科学与工程]