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MoO3-CuO 혼합분말의 볼 밀링 및 수소분위기 열처리에 의한 Mo-Cu 복합분말 제조 KCI 등재

Fabrication of Mo-Cu Powders by Ball Milling and Hydrogen Reduction of MoO3-CuO Powder Mixtures

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한국분말야금학회지 (Journal of Korean Powder Metallurgy Institute)
한국분말재료학회(구 한국분말야금학회) (Korean Powder Metallurgy Institute)
초록

The hydrogen reduction behavior of MoO3-CuO powder mixture for the synthesis of homogeneous Mo-20 wt% Cu composite powder is investigated. The reduction behavior of ball-milled powder mixture is analyzed by XRD and temperature programmed reduction method at various heating rates in Ar-10% H2 atmosphere. The XRD analysis of the heat-treated powder at 300oC shows Cu, MoO3, and Cu2MoO5 phases. In contrast, the powder mixture heated at 400oC is composed of Cu and MoO2 phases. The hydrogen reduction kinetic is evaluated by the amount of peak shift with heating rates. The activation energies for the reduction, estimated by the slope of the Kissinger plot, are measured as 112.2 kJ/mol and 65.2 kJ/mol, depending on the reduction steps from CuO to Cu and from MoO3 to MoO2, respectively. The measured activation energy for the reduction of MoO3 is explained by the effect of pre-reduced Cu particles. The powder mixture, hydrogen-reduced at 700oC, shows the dispersion of nano-sized Cu agglomerates on the surface of Mo powders.

목차
Abstract
 1. 서 론
 2. 실험 방법
 3. 실험결과 및 고찰
 4. 결 론
 References
저자
  • 강현지(서울과학기술대학교 신소재공학과) | Hyunji Kang (Department of Materials Science and Engineering, Seoul National University of Science and Technology)
  • 오승탁(서울과학기술대학교 신소재공학과) | Sung-Tag Oh (Department of Materials Science and Engineering, Seoul National University of Science and Technology) Corresponding Author