搅拌轴线速度对MWCNTs/Cu复合粉体和材料性能的影响
Effect of Rotational Linear Speed on Property of MWCNTs/Cu Composite Powders and Materials
摘 要
采用高能球磨法制备了多壁碳纳米管与铜粉(MWCNTs/Cu)的复合粉体, 随后用真空热压烧结制备了MWCNTs/Cu复合材料, 研究了球磨搅拌轴线速度对MWCNTs/Cu复合粉晶粒尺寸、粉体形貌及对MWCNTs/Cu复合材料力学性能的影响。结果表明: 随着搅拌轴线速度的增大, 铜的晶粒尺寸明显减小, 搅拌轴线速度为4.2/4.8 m·s-1时, 其晶粒尺寸趋于稳定, 为23 nm; MWCNTs/Cu复合材料的抗拉强度和硬度先增大后减小, 当搅拌轴线速度为4.2/4.8 m·s-1时, 抗拉强度和硬度达到最大, 分别为187.21 MPa 和166 HV; 球磨后铜粉形貌由球状变为片状, MWCNTs嵌入铜基体内, 当受到外界载荷时MWCNTs起到承担载荷的作用, 从而提高了复合材料的力学性能。
MWCNTs/Cu复合材料
晶粒尺寸
力学性能
high-energy ball milling
MWCNTs/Cu composite material
grain size
mechanical property
Abstract
The multi-walled carbon nanotubes and copper powders (MWCNTs/Cu) composite powders were prepared by high energy milling (HEM), then hot-press sintered to obtain MWCNTs/Cu composite material. The effects of various rotational linear speeds on the grain size and morphology of composite powders and the mechanical property of MWCNTs/Cu composite material were studied. The results show that the grain size of copper powder decreased with rotational speed increasing. At the rotational speed of 4.2/4.8 m·s-1, the average grain size of copper powder reached 23 nm. The tensile strength and microhardness of composite material first increased then decreased with the increase of rotational speed and reached maximum value at speed of 4.2/4.8 m·s-1, which was 187.21 MPa and 166 HV respectively. The shape of copper powder changed from spherical to lamella after milling, and MWCNTs was embedded in copper matrix and undertook the applied loads, therefore improved the mechanical property of composite material.
中图分类号 V256 DOI 10.11973/jxgccl201510004
所属栏目 试验研究
基金项目 云南省高校金属粉体制备与设备开发科技创新团队支持计划资助项目(14051693 ); 云南省重大基金资助项目(2014FC001)
收稿日期 2014/7/13
修改稿日期 2014/12/11
网络出版日期
作者单位点击查看
备注余明俊(1988-), 女, 陕西西安人, 硕士研究生。
引用该论文: YU Ming-jun,CAI Xiao-lan,ZHOU Lei,YI Feng,LI Zheng. Effect of Rotational Linear Speed on Property of MWCNTs/Cu Composite Powders and Materials[J]. Materials for mechancial engineering, 2015, 39(10): 16～20
余明俊,蔡晓兰,周蕾,易峰,李铮. 搅拌轴线速度对MWCNTs/Cu复合粉体和材料性能的影响[J]. 机械工程材料, 2015, 39(10): 16～20
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