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  • Volume 31 Issue 5
    Aug.  2021
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    Article Contents
    CHEN Jun-hong, SONG Wen, LIU Xiao-guang, SUN Jia-lin. Formation mechanism of Fe_xSi particles in ferro-silicon nitride prepared via flashing combustion[J]. Chinese Journal of Engineering, 2009, 31(5): 597-601. doi: 10.13374/j.issn1001-053x.2009.05.007
    Citation: CHEN Jun-hong, SONG Wen, LIU Xiao-guang, SUN Jia-lin. Formation mechanism of Fe_xSi particles in ferro-silicon nitride prepared via flashing combustion[J]. Chinese Journal of Engineering, 2009, 31(5): 597-601. doi: 10.13374/j.issn1001-053x.2009.05.007

    Formation mechanism of Fe_xSi particles in ferro-silicon nitride prepared via flashing combustion

    doi: 10.13374/j.issn1001-053x.2009.05.007
    • Received Date: 2008-06-15
      Available Online: 2021-08-09
    • The composition and structure of ferro-silicon nitride prepared via flashing combustion and the starting material FeSi75 were analyzed by SEM and EDS. The formation mechanism of FexSi particles in ferro-silicon nitride was studied in combination with thermodynamic analysis and flashing combustion. The results show that nitridation of metallic silicon and the silicon part of ξ phase (FeSi2.3) form silicon nitride during the synthesis of ferro-silicon nitride with FeSi75 of 74 μm. FexSi particles in ferro-silicon nitride come from nitridation of ξ phase. When the molar fraction of[Si] in ξ phase decreases to 25%, the activity of[Si] is approaching to zero and the nitridation reaction tends to balance. FexSi particles form from the residual part of ξ phase which can not be nitrided anymore. The atom proportion of Fe to Si is 3 to 1. The size of FexSi particles and homogeneity distribution relate to the particle size of phase.

       

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