文档介绍：第 44 卷第 7 期
2013 年 7 月
中南大学学报(自然科学版)
Journal of Central South University (Science and Technology)
July 2013
Ni­金刚石复合镀层的制备
王美娟,王日初,彭超群,冯艳,张纯,邓黎洁
(中南大学材料科学与工程学院,湖南长沙,410083)
摘要:通过复合电镀方法,在镀镍液中加入粒径为 40 μm 的金刚石粉体制备 Ni­金刚石复合镀层。采用阴极动电
位极化方法、扫描电镜和显微硬度计探讨镀液温度、pH、镍离子浓度、电流密度和金刚石粉体质量浓度对镀层质
量的影响,优化 Ni­金刚石复合镀的工艺参数;采用 X 线衍射分析仪表征优化后复合镀层的结构。研究结果表明:
优化的镀液组成和工艺参数为:NiSO4∙6H2O 132 g/L,NiCl2 15 g/L,H3BO3 30 g/L,镀液温度(50±1) ℃,pH 3~4,
阴极电流密度 4 A/dm 2 ,金刚石粉体质量浓度 30 g/L;优化后的复合镀层表面平整,晶粒细小均匀,且金刚石粉
体的质量分数为 %;与纯 Ni 镀层的晶粒相比,Ni­金刚石复合镀层的晶粒明显细化。
关键词:复合电沉积;温度;pH;镍离子浓度;阴极电流密度;金刚石粉体;镀层表面形貌
中图分类号:TQ153
文献标志码:A
文章编号:1672−7207(2013)07−2688−08
Preparation of Ni­posite coating by
composite electroplating
WANG Meijuan, WANG Richu, PENG Chaoqun, FENG Yan, ZHANG Chun, DENG Lijie
(School of Materials Science and Engineering, Central South University, Changsha 410083, China)
Abstract: The Ni­posite electrodeposition was prepared posite electroplating when diamond
particles with a diameter of 40 μm were put into the solution of Ni electroplating. The effects of temperature, pH value of
solution, concentration of Ni 2+ , cathode current density and concentration of diamond particles on the quality of
Ni­posite coatings were investigated by the cathodic potentiodynamic polarization, SEM and microhardness
tester. The optimized technological conditions of Ni­posit