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Combustion of the Fe-Si alloy in nitrogen gas

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Abstract

Combustion of the Fe-Si alloy in nitrogen gas was explored. The combustion was found to proceed in an autooscillating mode. Upon addition of nitrided ferrosilicon, magnesium fluoride, or ammonium chloride into a green mixture, the process becomes steady-state, while the extent of nitriding attains its maximum value. The phase composition and morphology of the product were found to depend on reaction conditions. The products formed in the presence of ferrosilicon or magnesium fluoride were found to largely contain columnar, platelike, and whiskerlike β-Si3N4 crystals (≥95%), while those in the presence of ammonium chloride contain silicon nitride with a granular structure and elevated content of the α-phase (<80%). Acid enrichment of combustion products was used to obtain silicon nitride with a Fe content of 0.01–0.1 wt %.

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Authors and Affiliations

  1. Division of Structural Macrokinetics, Tomsk Research Center, Siberian Division, Russian Academy of Sciences, pr. Akademicheskii 10/3, Tomsk, 634021, Russia

    L. N. Chukhlomina & Yu. M. Maksimov

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  1. L. N. Chukhlomina
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  2. Yu. M. Maksimov
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Chukhlomina, L.N., Maksimov, Y.M. Combustion of the Fe-Si alloy in nitrogen gas. Int. J Self-Propag. High-Temp. Synth. 16, 18–22 (2007). https://doi.org/10.3103/S1061386207010037

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  • DOI: https://doi.org/10.3103/S1061386207010037

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