脉冲电沉积纳米晶镍的力学性能研究  

Study on Mechanical Properties of Nanocrystalline Nickel by Pulse Electrodeposition

作　　者：陈晓明[1] 陈吉[1] 许志显 孙彦伟[1] 朴楠[1] 

机构地区：[1]辽宁石油化工大学机械工程学院,辽宁抚顺113001

出　　处：《热加工工艺》2016年第6期48-49,55,共3页Hot Working Technology

基　　金：辽宁省自然科学基金项目(201202127)

摘　　要：为提高纳米晶镍的显微硬度和抗拉强度,采用脉冲电沉积法制备了不同晶粒尺寸的纳米晶块体镍。利用X射线衍射法分析不同沉积条件的纳米晶镍表面织构和晶粒尺寸。采用超显微微米压痕仪测量表面硬度,利用英斯特朗疲劳试验机进行拉伸试验。结果表明,平均晶粒尺寸为12 nm的纳米晶镍表面显微硬度为598 HV,最大拉伸强度达1360MPa,分别为晶粒尺寸是55 nm的纳米晶镍2.0和1.6倍。另外,晶粒尺寸较小的纳米晶镍伸长率较低。To improve the microhardness and tensile strength of nanocrystalline nickel, nanocrystalline nickel with different grain size was prepared by pulse etectrodeposition. The nanocrystalline nickel surface texture and grain size under different deposition conditions was analyzed by using XRD analysis. The surface hardness was tested by ultra-microscopic micron indentation tester. The tensile experiment was carried out on Instron tensile fatigue tester. The results show that the surface hardness of nanocrystalline nickel with average grain size of 12 nm is 598 HV, the maximum tensile strength is 1360 MPa, which is 2.0 and 1.6 times of nanocrystalline nickel with the grain size of 55nm, respectively. However, the elongation of nanocrystalline with small grain size is low.

关 键 词：脉冲电沉积 纳米晶镍 硬度 强度 

分 类 号：TG113.2[金属学及工艺—物理冶金]