摘要
采用XRD和SEM研究了电沉积时间对电解镍的择优生长方向、晶粒大小、表面形貌和截面组织的影响。结果表明,随着电沉积时间的延长,电解镍的晶体生长方向会发生变化,由最初的(111)(200)面织构变为16 h后的(220)面织构;随着沉积过程的进行,电解镍的微观表面形貌由棱锥状慢慢变为胞状,生长机制由开始时的螺旋位错生长变为累积长大机制;电解镍的横截面组织由细晶粒层和较粗大晶粒层构成,属于非均匀沉积层,大部分晶粒呈柱状生长,并且垂直于始极片,晶粒大小沿沉积厚度呈阶梯状分布。
Effect of deposition time on preferential growth direction, grain size, surface morphology and cross-sectional microstructure of electrolytic nickel was investigated by means of XRD and SEM. The results show that with increasing of deposition time, the preferred orientation of electrolytic nickel transits initially from （ 111 ） （200） crystal face to （220） crystal face after 16 h; the surface morphology changes slowly from pyramid shape to cellular, the growth mechanism changes from screw dislocation growth mechanism to cumulative growth mechanism. The cross-sectional microstructure of electrolytic nickel is composed of fine-grained layer and coarse grains layer. The deposited layer is non-uniform and mostly grains are columnar and perpendicular to the sheet. The distribution of grain size follows siepwise distribution along the thickness.
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2016年第2期216-220,共5页
Transactions of Materials and Heat Treatment
基金
金昌市青年人才基金(jrc2015-76)
关键词
电解镍
表面形貌
晶粒大小
择优取向
截面组织
electrolytic nickel
surface morphology
grain size
preferred orientation
cross-sectional structure
