氟化物体系熔盐电解制备YNi合金  

Preparation of YNi alloy by molten salt electrolysis in fluoride system

作　　者：王玉香[1,2] 赖华生 文小强[1,2] 刘雯雯 洪侃[1,2] WANG Yuxiang;LAI Huasheng;WEN Xiaoqiang;LIU Wenwen;HONG Kan(Ganzhou Nonferrous Metallurgy Institute,Ganzhou 341000,Jiangxi,China;Tungsten and Rare Earth Functional Alloy Materials Engineering Laboratory of Jiangxi,Ganzhou 34100,Jiangxi,China)

机构地区：[1]赣州有色冶金研究所,江西赣州341000 [2]江西省钨与稀土功能合金材料工程实验室,江西赣州341000

出　　处：《有色金属科学与工程》2021年第1期126-130,共5页Nonferrous Metals Science and Engineering

基　　金：江西省重点研发资助项目(20202BBE53015);江西钨业控股集团有限公司科技资助项目(JXTC-20A-03)。

摘　　要：以Y2O3为电解原料,以金属镍棒为自耗阴极、石墨板为阳极,在常规的石墨电解槽中采用氟化物体系熔盐电解法制备了YNi合金。研究了电解时间、电解温度、电解质组成、阴极电流密度等主要技术参数对电解过程的影响,并对所制备的钇镍合金进行了表征。结果表明,熔盐电解制备钇镍合金的较优工艺条件为:电解温度1000℃,电解质YF3与LiF质量比为85∶15,阴极电流密度为10.0 A/cm^(2),正常电解时电流效率约为72.8%;制备的钇镍合金中Y含量为52.6%,由YNi2相和YNi相组成,杂质含量低,满足稀土储氢合金对原料的使用要求。本文的研究为钇镍合金的规模化生产提供了切实可行的途径。YNi alloy was prepared by molten salt electrolysis of fluoride system in conventional graphite electrolyzer with Y2O3 as raw materials,nickel rod as consumable cathode and graphite plate as anode.The effects of electrolysis time,electrolysis temperature,electrolyte composition and cathode current density on the electrolysis process were studied.The results showed that the optimum technological conditions for preparing yttrium nickel alloy by molten salt electrolysis were as follows.The electrolysis temperature was 1000℃,and the mass ratio of YF3 to LiF was 85∶15.The cathode current density was 10.0 A/cm^(2) and the current efficiency was about 72.8%in normal electrolysis.The Y Content of the prepared yttrium nickel alloy was 52.6%,which was composed of YNi2 phase and Y-Ni phase.The content of impurity was quite low,which could meet the requirement of rare earth hydrogen storage alloy for raw materials.The research results of this paper provide a feasible way for the large-scale production of Y-Ni alloy.

关 键 词：钇镍合金 熔盐电解 Y2O3 YF3-LiF体系 

分 类 号：TF123.1[冶金工程—粉末冶金] TG139[冶金工程—冶金物理化学]