Kim B J, Oh S Y, Yun H S, Ki J H, Kim C J, Baik S, Lim B S
School of Mechanical Engineering, Sungkyunkwan University, Suwon, Korea 300, Cheoncheon-dong, Jangan-gu, Suwon 440-746, Korea.
J Nanosci Nanotechnol. 2009 Dec;9(12):7393-7. doi: 10.1166/jnn.2009.1758.
In this paper, to improve the poor wettability between the Carbon nanotubes (CNTs) and metal matrix, the mechanical alloying (MA) technique by the ball milling method was employed. Also, the CNTs were pre-coated to improve the agglomeration of the CNTs with copper powder. The main aim of this work is the fabrication of Cu-CNT nanocomposite powder using the MA by ball milling. The as-received dendritic copper powders change their shape sequentially to flaky, disk-typed particles and finally, to globular type particles. Also, the tendency of globular formation was prominent in the milled Cu-Cu coated MWNTs (multi-walled carbon nanotubes) powder and the grain size of the sintered Cu coated MWNTs specimen decreased more than that of the pure copper specimen. Finally, the homogeneous Cu-CNT nanocomposite intermetallic particles having fine grains was produced by the MA method of ball milling.
在本文中，为改善碳纳米管（CNT）与金属基体之间较差的润湿性，采用了球磨法的机械合金化（MA）技术。此外，对碳纳米管进行了预包覆处理，以改善碳纳米管与铜粉的团聚现象。这项工作的主要目的是通过球磨法的机械合金化制备铜-碳纳米管纳米复合粉末。所接收的树枝状铜粉形状依次变为片状、盘状颗粒，最终变为球状颗粒。此外，在球磨的铜-包覆多壁碳纳米管（MWNTs）粉末中，球状形成趋势显著，且烧结的包覆多壁碳纳米管铜试样的晶粒尺寸比纯铜试样减小得更多。最后，通过球磨法的机械合金化制备出了具有细晶粒的均匀铜-碳纳米管纳米复合金属间化合物颗粒。
