大面积EBSD方法对电解镍板的研究  

Research on Industrial Electrolytic Nickel Plate by Large Area EBSD Method

作　　者：徐仰涛[1,2,3] 刘志健 王超 Xu Yangtao;Liu Zhijian;Wang Chao(State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metal,Lanzhou University of Technology,Lanzhou 730050,China;State Key Laboratory for Comprehensive Utilization of Nickel and Cobalt Resources,Jinchang 737100,China;Baiyin Novel Materials Research Institute,Lanzhou University of Technology,Baiyin 730900,China)

机构地区：[1]兰州理工大学省部共建有色金属先进加工与再利用国家重点实验室,甘肃兰州730050 [2]镍钴资源综合利用国家重点实验室,甘肃金昌737100 [3]兰州理工大学白银新材料研究院,甘肃白银730900

出　　处：《稀有金属材料与工程》2021年第12期4372-4380,共9页Rare Metal Materials and Engineering

基　　金：镍钴资源综合利用国家重点实验室基金。

摘　　要：利用大面积电子背散射衍射(EBSD)拼接技术,对电解镍板在生长方向上的晶粒形貌及尺寸、择优取向、晶界特征分布等随着沉积的变化进行了研究,并通过SEM观察镍板的微观形貌。结果表明:镍晶粒随着沉积的进行由细小的等轴晶粒转变为粗大的柱状晶,尺寸呈微纳米级;晶体取向在沉积初始没有强的择优取向,最终转变为<001>取向;沉积初期,大角度晶界占比80%以上,随着沉积的进行,大小晶界的比例在沉积层不同位置出现差异;镍沉积层中大量相邻晶粒间以∑3、∑9、∑27孪晶界为界,其中∑3晶界频率达到65%以上。在始极片不同表面形成的镍沉积层长大方式不同,细晶粒表面按照形核长大方式生长,在自由生长的表面镍原子直接并入晶格,没有经历形核过程。The crystal grain morphology and size,preferred orientation,and grain boundary feature distribution of the electrolytic nickel plate in the growth direction were studied by large-area electron backscattered diffraction(EBSD)splicing technology,and the microstructure of the nickel plate was observed by SEM.The results show that the nickel crystal grains change from small equiaxed crystal grains to coarse columnar crystals with the size of micro-nano scale as the deposition progresses;the crystal orientation does not has a strong preferred orientation at the beginning of the deposition,and finally changes to the<001>orientation.In the initial stage of deposition,the large-angle grain boundaries account for more than 80%;as the deposition progresses,the proportions of large and small grain boundaries vary in different positions of the deposition layer;a large number of adjacent grains in the nickel deposition layer are separated by∑3,∑9,∑27 twin boundaries,and the∑3 grain boundary frequency reaches more than 65%.The nickel deposition layer formed on the different surfaces of the starting sheet grows in different ways.The surface of the fine grains grows in the nucleation and growth way,and the nickel atoms on the free-growing surface are directly incorporated into the crystal lattice without undergoing the nucleation process.

关 键 词：EBSD 电解镍 微观组织 取向演变 晶界特征分布 

分 类 号：TG146.15[一般工业技术—材料科学与工程]