Journal of Powder Materials (한국분말재료학회지)

The Korean Powder Metallurgy & Materials Institute (한국분말재료학회 (*구 분말야금학회))
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In-situ Synthesis of Cu-TiB2 Nanocomposite by MA/SPS

  • Kwon, Young-Soon (Research Center for Machine Parts and Materials Processing, University of Ulsan) ;
  • Kim, Ji-Soon (Research Center for Machine Parts and Materials Processing, University of Ulsan) ;
  • Kim, Hwan-Tae (Research Center for Machine Parts and Materials Processing, University of Ulsan) ;
  • Moon, Jin-Soo (Research Center for Machine Parts and Materials Processing, University of Ulsan) ;
  • D.V Dudina (Institute of Solid State Chemistry and Mechanochemistry, SB RAS) ;
  • O.I. Lomovsky (Institute of Solid State Chemistry and Mechanochemistry, SB RAS)
  • Published : 2003.12.01
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Abstract

Nano-sized $TiB_2$ was in situ synthesized in copper matrix through self-propagating high temperature synthesis (SHS) with high-energy ball milled Ti-B-Cu elemental mixtures as powder precursors. The size of $TiB_2$ particles in the product of SHS reaction decreases with time of preliminary mechanical treatment ranging from 1 in untreated mixture to 0.1 in mixtures milled for 3 min. Subsequent mechanical treatment of the product of SHS reaction allowed the $TiB_2$ particles to be reduced down to 30-50 nm. Microstructural change of $TiB_2$-Cu nanocomposite during spark plasma sintering (SPS) was also investigated. Under simultaneous action of pressure, temperature and electric current, titanium diboride nanoparticles distributed in copper matrix move, agglomerate and form a interpenetrating phase composite with a fine-grained skeleton.

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