摘要
采用watt镀液通过脉冲电沉积制得纳米镍沉积层。通过扫描电镜(SEM)、X射线衍射(XRD)分析了沉积层的表面形貌、结构和晶粒大小与脉冲参数的关系,分析表明:微观形貌为胞状结构,平均晶粒尺寸为10.3nm;随着占空比的减小,晶粒得以细化。研究了脉冲参数对纳米镍层显微硬度、抗拉强度的影响,最大拉伸强度大900MPa,为常规镍镀层的2.5倍;通过正交法得到最佳制造金刚石工具的脉冲参数,磨削加工试验显示,平均寿命为常规镍的1.5倍。
Nano-crystal Nickel deposits were obtained by the traditional Watt nickel plating technique using pulse electro deposition. The relationship between pulse parameters and the morphology and texture of the Ni- coatings was studies by means of SEM and XRD. The analysis results showed that the micro-morphology displays a lumpy structure, the mean grain size is 10.6nm. With the decrease of duty cycle, the grain size is falling. The effect of pulse parameters on micro-hardness and tensile strength were investigated, the results showed that the biggest micro-hardness and tensile strength can reach to 591 HV and 900Mpa, about 4 and 2.5 times that of normal nickel layer. The optimized pulse parameters were obtained by the orthogonal experiments and had been applied in the manufacture of diamond tool successfully.
出处
《中国表面工程》
EI
CAS
CSCD
2005年第5期43-46,共4页
China Surface Engineering
关键词
纳米晶镍
脉冲参数
抗拉强度
金刚石工具
nano-crystalline Nickel
pulse parameters
tensile strength
diamond tool
