Journal of Powder Materials (한국분말재료학회지)

The Korean Powder Metallurgy & Materials Institute (한국분말재료학회 (*구 분말야금학회))
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Characteristics of WO3-CuO Powder Mixture Prepared by High-Energy Ball Milling in a Bead Mill for the Synthesis of W-Cu Nanocomposite Powder

W-Cu 나노분말 합성을 위해 비드밀에서 고에너지 볼밀링 공정에 의해 제조된 WO3-CuO 혼합분말의 특성 연구

  • Park, Hae-Ryong (Department of Engineering Ceramic Center, Korea Institute of Ceramic Engineering and Technology) ;
  • Ryu, Sung-Soo (Department of Engineering Ceramic Center, Korea Institute of Ceramic Engineering and Technology)
  • 박해룡 (한국세라믹기술원 엔지니어링세라믹센터) ;
  • 류성수 (한국세라믹기술원 엔지니어링세라믹센터)
  • Received : 2017.10.16
  • Accepted : 2017.10.21
  • Published : 2017.10.28
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Abstract

A Nanosized $WO_3$ and CuO powder mixture is prepared using novel high-energy ball milling in a bead mill to obtain a W-Cu nanocomposite powder, and the effect of milling time on the structural characteristics of $WO_3-CuO$ powder mixtures is investigated. The results show that the ball-milled $WO_3-CuO$ powder mixture reaches at steady state after 10 h milling, characterized by the uniform and narrow particle size distribution with primary crystalline sizes below 50 nm, a specific surface area of $37m^2/g$, and powder mean particle size ($D_{50}$) of $0.57{\mu}m$. The $WO_3-CuO$ powder mixtures milled for 10 h are heat-treated at different temperatures in $H_2$ atmosphere to produce W-Cu powder. The XRD results shows that both the $WO_3$ and CuO phases can be reduced to W and Cu phases at temperatures over $700^{\circ}C$. The reduced W-Cu nanocomposite powder exhibits excellent sinterability, and the ultrafine W-Cu composite can be obtained by the Cu liquid phase sintering process.

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