Effect of Ball Milling on the Defeat of Few-Layer Graphene and Properties of Copper Matrix Composites

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• 作者：Ye Cui (1)
  Lidong Wang (1)
  Bin Li (1)
  Guojian Cao (2)
  Weidong Fei (1) (3)
  
• 关键词：Copper ; Composites ; Ball milling ; Mechanical properties ; Conductivity
• 刊名：Acta Metallurgica Sinica (English Letters)
• 出版年：2014
• 出版时间：October 2014
• 年：2014
• 卷：27
• 期：5
• 页码：937-943
• 全文大小：1,420 KB
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• 作者单位：Ye Cui (1)
  Lidong Wang (1)
  Bin Li (1)
  Guojian Cao (2)
  Weidong Fei (1) (3)
  
  1. School of Materials Science and Engineering, Harbin Institute of Technology, Harbin, 150001, China
  2. School of Materials Science and Engineering, Harbin University of Science and Technology, Harbin, 150040, China
  3. School of Mechanical Engineering, Qinghai University, Xining, 810016, China
  
• ISSN：2194-1289

文摘

Graphene-reinforced copper composites recently have attracted more attention, since they exhibited excellent mechanical properties and could be used widely in many fields. Few-layer graphene (FLG) and copper powder were mixed by ball milling to produce homogeneous composite powders. Then, FLG-reinforced copper composites (FLG/Cu) were fabricated by spark plasma sintering (SPS) using the composite powders with a FLG volume fraction of 2.4 vol%. The effects of the rotating speed and the time of ball milling were analyzed based on the microstructure evolution and properties of the FLG/Cu composites. Obvious strengthening effect of FLG was found for the composites, and the conductance of the composite reaches 70.4% of IACS. The yield strength of the composite produced by ball milling at a speed of 100?r/min for 4?h is 376?MPa, which is 2.5 times higher than that of copper and higher than that of copper composite enhanced by 5 vol% CNTs (360?MPa). The defects produced in FLG with the increase of rotating speed and time could reduce the mechanical and conductive properties of the composites.