Preparation of copper-graphite composite particles by milling process

S. Motozuka, M. Tagaya, T. Ikoma, T. Yoshioka, Z. Xu, J. Tanaka

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

The fabrication of copper-graphite composites by a milling process was investigated using a centrifugal ball mill. The copper particles were homogeneously milled in a graphite vessel, and the reaction time was varied. Scanning electron microscopy images clearly revealed that a fragment of graphite ground by the copper particle adheres to the copper particle surface, indicating the formation of a copper-graphite composite. The composite graphite amount per 1 g of copper particles increased to 0.46 mg at the milling time 5 min, and subsequently decreased to 0.25 mg at 60 min, indicating the suitable milling-time for the interfacial adhesion. When using only the copper particles, the naturally oxidized layer on the surface decreased with milling. On the other hand, when using only the graphite, the characteristic graphite structure is disrupted and the defect structure increased with milling. Thus, the new copper surface generated by milling strongly reacts with the defect structure of the graphite. It is suggested that the interfacial bonding between the copper and graphite was attributed to a Van der Waals attraction and/or binding force due to oxygen atoms located at the interface.

Original languageEnglish
Pages (from-to)2829-2834
Number of pages6
JournalJournal of Composite Materials
Volume46
Issue number22
DOIs
Publication statusPublished - Oct 1 2012

Keywords

  • Composites
  • interfaces
  • mechanical alloying
  • surface oxidation

ASJC Scopus subject areas

  • Ceramics and Composites
  • Mechanics of Materials
  • Mechanical Engineering
  • Materials Chemistry

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