| CoCrFeNi高熵合金在金属氧化物熔盐电脱氧中的形成过程 |
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| 引用本文： | 杨宇,罗翔宇,马通祥,胡丽文,温良英,扈玫珑.CoCrFeNi高熵合金在金属氧化物熔盐电脱氧中的形成过程[J].稀有金属材料与工程,2021,50(9):3116-3124. |
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| 作者姓名： | 杨宇 罗翔宇 马通祥 胡丽文 温良英 扈玫珑 |
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| 作者单位： | 重庆大学 材料科学与工程学院，重庆 400044;重庆大学 钒钛冶金与新材料重庆市重点实验室，重庆 400044,重庆大学 材料科学与工程学院，重庆 400044;重庆大学 钒钛冶金与新材料重庆市重点实验室，重庆 400044,重庆大学 材料科学与工程学院，重庆 400044;重庆大学 钒钛冶金与新材料重庆市重点实验室，重庆 400044,重庆大学 材料科学与工程学院，重庆 400044;重庆大学 钒钛冶金与新材料重庆市重点实验室，重庆 400044,重庆大学 材料科学与工程学院，重庆 400044;重庆大学 钒钛冶金与新材料重庆市重点实验室，重庆 400044,重庆大学 材料科学与工程学院，重庆 400044;重庆大学 钒钛冶金与新材料重庆市重点实验室，重庆 400044 |
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| 基金项目： | 国家自然科学基金项目（面上项目，重点项目，重大项目） |
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| 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。
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| 关 键 词： | 高熵合金 电脱氧 形成过程 氧含量 电流效率 |
| 收稿时间： | 2020/7/28 0:00:00 |
| 修稿时间： | 2020/8/25 0:00:00 |
Formation Process of CoCrFeNi High Entropy Alloy via Electro-Deoxidization of Metal Oxides in Molten Salt |
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| Yang Yu,Luo Xiangyu,Ma Tongxiang,Hu Liwen,Wen Liangying and Hu Meilong.Formation Process of CoCrFeNi High Entropy Alloy via Electro-Deoxidization of Metal Oxides in Molten Salt[J].Rare Metal Materials and Engineering,2021,50(9):3116-3124. |
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| Authors: | Yang Yu Luo Xiangyu Ma Tongxiang Hu Liwen Wen Liangying and Hu Meilong |
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| Affiliation: | 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,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,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,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,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,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 |
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| Abstract: | 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. |
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| Keywords: | high-entropy alloys electro-deoxidization formation process oxygen content current efficiency |
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