Abstract: Ni-Yb alloy was prepared by electrolysis of fluorine salt-oxide system with LiF-CaF2 as medium and Yb2O3 as raw material. Cyclic voltammetry was adopted to analyze the electrochemical behavior of Yb (Ⅲ) ions, and X-ray diffraction, scanning electron microscope and energy dispersive spectroscope were employed to characterize the components and phase composition of the Ni-Yb alloys. It can be found from the results that the Ni-Yb alloy was successfully prepared by 3 hours’ electrolysis in the LiF-CaF2-Yb2O3 (n(LiF)∶n(CaF2)=77∶23) eutectic system with self-consumed Ni as cathode at a temperature of 1 523 K and cell voltage of 4.0 V. The implementation of Yb (Ⅲ) reduction includes two steps. Firstly, Yb (Ⅲ) obtained an electron, and was reduced to Yb (Ⅱ). Secondly, the Yb (Ⅱ) ion was reduced to Yb on the surface of Ni cathode. Consequently, the Ni-Yb alloy composed of basic phase Ni, Ni5Yb, Ni17Yb2 was formed through electrochemical reduction and alloyed process. It is fully demonstrated that the depolarization on active nickel electrode will lead to a positive shift of reduction potential of Yb (Ⅱ), which breaks through the limitation that the variable valence rare earth Yb (Ⅱ) ion can not be reduced to Yb on the surface of the inert electrode in fluorine salt medium.
王旭, 廖春发, 王瑞祥, 孙强超. 氟化物介质熔盐电解制备Ni-Yb合金及其表征[J]. 材料导报, 2019, 33(5): 750-753.
WANG Xu, LIAO Chunfa, WANG Ruixiang, SUN Qiangcao. Characterization and Preparation of Ni-Yb Alloy by Molten Salt Electrolysis in Fluoride Melt. Materials Reports, 2019, 33(5): 750-753.
1 Tuan N Q, Alves A C, Toptan F, et al. Materials and Corrosion,2015,66(12),1504. 2 Zhang Shuo, Yang Cuicui, Zu Shiqi, et al. Hot Working Technology,2014,43(15),6(in Chinese). 张烁,杨翠翠,俎世琦,等.热加工工艺,2014,43(15),6. 3 Jia K, Yu W B, Yao J M, et al. Rare Metals,2017,36,95. 4 Liu Xingjun, Zhang Hongling, Wang Shuliang, et al. The Chinese Journal of Nonferrous Metals,2011,21(4):865(in Chinese). 刘兴军,张红玲,王书亮,等.中国有色金属学报,2011,21(4),865. 5 Tang C L, Zhou D J. Transactions of Nonferrous Metals Society of China,2014,7(24),2326. 6 Hodges J A, Bonville P, Ocio M. The European Physical Journal B,2007,57,365. 7 Wu W Y.Rare earth metallurgy, Chemical Industry Press,China,2005(in Chinese). 吴文远.稀土冶金学,化学工业出版社,2005. 8 Ota K I, Kreysa G, Savinell R F.Encyclopedia of applied electrochemistry, Springer Berlin,GER,2014. 9 Smolenski V, Novoselova A, Osipenko A, et al. Journal of Electroanaly-tical Chemistry,2009,633,291. 10 Novoselova A V, Smolenskii V V. Radiochemistry,2013,55(3),243. 11 Yamagata Masaki, Katayama Yasushi, Miura Takashi. Journal of the Electrochemical Society,2006,153(1),E5. 12 Gibilaro M, Bolmont S, Massot L, et al. Journal of Electroanalytical Chemistry,2014,726,84. 13 Bard A J, Faulkner L R. Russian Journal of Electrochemistry,2002,38(12),156. 14 Ye D L.Practical inorganic thermodynamics data manual, Metallurgical Industry Press,China,2002(in Chinese). 叶大伦.实用无机热力学数据手册,冶金工业出版社,2002. 15 Wang Xu, Liao Chunfa, Jiao Yunfen, et al. Materials Review B:Research Papers,2017,31(11),50(in Chinese). 王旭,廖春发,焦芸芬,等.材料导报:研究篇,2017,31(11),50. 16 Iida Takahisa, Nohira Toshiyuki, Ito Yasuhiko. Electrochimica Acta,2003,48(10),1531.
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2019, Vol. 33 
