Fabrication of Fe-TiB<sub>2</sub> Composite Powder by High-Energy Milling and Subsequent Reaction Synthesis

H.X. Khoa; N.Q. Tuan; Y.H. Lee; B.H. Lee; N.H. Viet; J.S. Kim

doi:10.4150/KPMI.2013.20.3.221

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Fabrication of Fe-TiB₂ Composite Powder by High-Energy Milling and Subsequent Reaction Synthesis: H.X. Khoa, N.Q. Tuan, Y.H. Lee, B.H. Lee, N.H. Viet, J.S. Kim; Journal of Korean Powder Metallurgy Institute 2013;20(3):221-227
DOI: https://doi.org/10.4150/KPMI.2013.20.3.221

¹School of Materials Science and Engineering, University of Ulsan
²School of Materials Science and Engineering, University of Ulsan
³School of Materials Science and Engineering, University of Ulsan
⁴School of Materials Science and Engineering, University of Ulsan
⁵School of Materials Science and Engineering, Hanoi University of Science and Technology
⁶School of Materials Science and Engineering, University of Ulsan

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Abstract

TiB_2-reinforced iron matrix composite (Fe-TiB_2) powder was in-situ fabricated from titanium hydride (TiH_2) and iron boride (FeB) powders by the mechanical activation and a subsequent reaction. Phase formation of the composite powder was identified by X-ray diffraction (XRD). The morphology and phase composition were observed and measured by field emission-scanning electron microscopy (FE-SEM) and energy-dispersive X-ray spectroscopy (EDS), respectively. The results showed that TiB_2 particles formed in nanoscale were uniformly distributed in Fe matrix. Fe_2B phase existed due to an incomplete reaction of Ti and FeB. Effect of milling process and synthesis temperature on the formation of composite were discussed.

Keywords: Fe-TiB_2 composite;Mechanical activation;Solid state reaction;Heat treatment;

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