HE Nairu1，FANG Ziwen1，JIA Junhong1，LIU Ning2，YANG Jie1
(1.School of Mechanical and Electrical Engineering,Shaanxi University of Science and Technology,Xi’an,710021，China; 2.Xi’an Aerospace Composite Materials Research Institute,Xi’an,710021，China)
Abstract:Core-shell Ag@Ni powders were prepared by using chemical plating method taking sodium sodium hypophosphite,nickel sulfate,and sodium citrate as reducing agent,principal salt,and complexation agent,respectively.Morphology,structures and chemical composition of core-shell Ag@Ni powders were characterized by optical microscopy (OM),scanning electron microscope (SEM),energy dispersive spectrometer (EDS),and X-ray diffraction (XRD).The influence of the chemical plating solution concentration on plated layer thickness of the core-shell Ag@Ni powders were explored by designing a single factor experiment,taking the concentration of the chemical plating solution as a single factor,and the concentration of nickel sulfate,sodium hypophosphite,and sodium citrate as impact factors.The results show that core-shell Ag@Ni powders have good inclusion and integrity.The morphological structure of Ag do not change during the preparation of core-shell Ag@Ni powders.The plated Ni layer is present in pure element Ni and grows predominantly along the (111)crystal surface of Ni.The plated layer thickness of the core-shell Ag@Ni powders increase significantly,with increasing of the concentration of nickel sulfate,sodium hypophosphite,and sodium citrate.The concentration of the reducing agent sodium hypophosphite has the most significant effect on the growth rate of the plated layer thickness and the concentration of sodium citrate has the least effect.
Keywords:core-shell structure;Ag;Ni;chemical plating
中图分类号： TQ153 文献标志码：A
文章编号：1008-5548(2022)02-0099-07
DOI:10.13732/j.issn.1008-5548.2022.02.012
收稿日期： 2021-09-02，修回日期：2021-09-12，在线出版时间：2022-01-30。
基金项目：国家自然科学基金项目，编号 ：51905325；中国博士后科学基金项目，编号：2019M653525。
第一作者简介：何乃如(1989—)，男，博士，副教授，硕士生导师，研究方向为固体润滑材料的设计、制备及性能研究。E-mail：henairu@sust.edu.cn。
通信作者简介：贾均红(1974—)，男，博士，教授，研究方向为摩擦学及表面工程。E-mail：jhjiasust@163.com。
