[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.]
[doi] |
| Formation Process of CoCrFeNi High Entropy Alloy via Electro-Deoxidization of Metal Oxides in Molten Salt |
|
Download Pdf View/Add Comment Download reader |
| Received:July 28, 2020 Revised:August 25, 2020 |
| DOI： |
| Key words: high-entropy alloys electro-deoxidization formation process oxygen content current efficiency |
| Foundation item:国家自然科学基金项目（面上项目，重点项目，重大项目） |
|
| Hits: 384 |
| Download times: 10549 |
| 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. |
|
|
|
