A fast-pyrolysis self-propagating high temperature synthesis route to single phase of boron carbide ultrafine powders

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  • ZHANG Laiping
    School of Material Science and Engineering, Wuhan Institute of Technology
  • GU Yunle
    School of Material Science and Engineering, Wuhan Institute of Technology
  • WANG Weiming
    The State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology
  • WANG Jilin
    School of Material Science and Engineering, Wuhan Institute of Technology
  • ZHAO Guowei
    School of Material Science and Engineering, Wuhan Institute of Technology
  • QIAN Qiongli
    School of Material Science and Engineering, Wuhan Institute of Technology
  • ZHANG Zhanhui
    School of Material Science and Engineering, Wuhan Institute of Technology
  • ZHANG Fang
    School of Material Science and Engineering, Wuhan Institute of Technology

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Single phase of boron carbide B13C2 ultrafine powders was synthesized by a fast-pyrolysis-self-propagating high temperature synthesis method. The X-ray diffractometry is demonstrated a pure phase of rhombohedral structure. The field-emission scanning electron microscopy and transmission electron microscopy show that the size of particles ranged from 50 to 200 nm, with approximately 90 nm in average. The energy dispersive X-ray spectroscopy reveals that the sample has a uniform composition with the B/C atomic ratios ranging from 6.38 to 6.49. The Raman spectrum indicates the characteristic vibrations of C–B–C chain and B12 icosahedron. Fast-pyrolysis-self-propagating high temperature synthesis and vapor–solid growth mechanism ware proposed.

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