• Title/Summary/Keyword: reduction synthesis

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Fabrication of Fe-TiC Composite Powder by High-Energy Milling and Subsequent Reaction Synthesis (고에너지 밀링 및 합성반응에 의한 Fe-TiC 복합분말 제조)

  • Ahn, Ki-Bong;Lee, Byung-Hun;Lee, Young-Hee;Khoa, Hyunh Xuan;Kim, Ji-Soon
    • Journal of Powder Materials
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    • v.20 no.1
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    • pp.53-59
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    • 2013

  • Fe-TiC composite powder was fabricated via two steps. The first step was a high-energy milling of FeO and carbon powders followed by heat treatment for reduction to obtain a (Fe+C) powder mixture. The optimal condition for high-energy milling was 500 rpm for 1h, which had been determined by a series of preliminary experiment. Reduction heat-treatment was carried out at $900^{\circ}C$ for 1h in flowing argon gas atmosphere. Reduced powder mixture was investigated by X-ray Diffraction (XRD), Field Emission-Scanning Electron Microscopy (FE-SEM) and Laser Particle Size Analyser (LPSA). The second step was a high-energy milling of (Fe+C) powder mixture and additional $TiH_2$ powder, and subsequent in-situ synthesis of TiC particulate in Fe matrix through a reaction of carbon and Ti. High-energy milling was carried out at 500 rpm for 1 h. Heat treatment for reaction synthesis was carried out at $1000{\sim}1200^{\circ}C$ for 1 h in flowing argon gas atmosphere. X-ray diffraction (XRD) results of the fabricated Fe-TiC composite powder showed that only TiC and Fe phases exist. Results from FE-SEM observation and Energy-Dispersive X-ray Spectros-copy (EDS) revealed that TiC phase exists uniformly dispersed in the Fe matrix in a form of particulate with a size of submicron.

  • https://doi.org/10.4150/KPMI.2013.20.1.053 인용 PDF KSCI