A Novel Method to Fabricate CNT/Mg–6Zn Composites with High Strengthening Efficiency

被引：0
作者：
Hailong Shi
Xiaojun Wang
Chendong Li
Xiaoshi Hu
Chao Ding
Kun Wu
Yudong Huang
机构：
[1] Harbin Institute of Technology,School of Materials Science and Engineering
[2] Harbin Institute of Technology,School of Chemical Engineering and Technology
来源：
Acta Metallurgica Sinica (English Letters) | 2014年 / 27卷
关键词：
Pre-dispersion; Carbon nanotubes; Magnesium matrix composites; Mechanical properties; Ultrasonic vibration;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
A novel method was developed to fabricate carbon nanotubes (CNTs)-reinforced Mg matrix composites. The method consists of two steps: CNTs pre-dispersion by ball-milling and the ultrasonic melt processing. Mechanical ball-milling effectively pre-dispersed CNTs on Zn flakes with suitable rotational speed and ball-milling time. Serious CNT entanglements were dispersed by the ball-milling. However, ball-milling for a long time at high speed would damage the morphology of CNTs. The ultrasonic overcame the poor wettability between Mg melt and CNTs and then dispersed pre-dispersed CNTs in the Mg melt. CNTs were distributed well in the composites and maintained integrated structure. CNTs significantly improved the mechanical properties of the matrix. The strengthening efficiency reached to 37.1, which proves the superiority of this novel method. Besides grain refinement, load transfer may make a great contribution to the improvement of the strength for the composites.
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页码：909 / 917
页数：8
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