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Home > Archive>Volume 50, Issue 9, 2021 >3116-3124. DOI:10.12442/j.issn.1002-185X.20200548
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Formation Process of CoCrFeNi High Entropy Alloy via Electro-Deoxidization of Metal Oxides in Molten Salt
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Affiliation:

1.College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China;2.Chongqing Key Laboratory of Vanadium-Titanium Metallurgy and New Materials, Chongqing University, Chongqing 400044, China

Fund Project:

National Natural Science Foundation of China (51674054)

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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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[Yang Yu, Luo Xiangyu, Ma Tongxiang, Hu Liwen, Wen Liangying, 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：10.12442/j. issn.1002-185X.20200548

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History
  • Received:July 28,2020
  • Revised:August 25,2020
  • Adopted:September 02,2020
  • Online: September 26,2021
  • Published: September 24,2021

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