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Abstract <p>Direct nitriding of spherical microparticles of carbonyl iron powder was carried out by means of chemical oven technique. Experimental selection of highly exothermic mixtures (“chemical ovens”) and nitrogen-containing additives was realized. It was shown that the nitriding products contain Fe<sub>3</sub>N<sub><i>x</i></sub> where <i>x</i> ranges from 0.93 to 1.15 as a basis and are represented by spherical core–shell particles where the core is iron and the shell consisting of sub-microcrystals includes Fe, Fe<sub>3</sub>C, and Fe<sub><i>x</i></sub>N (<i>x</i> = 3 and 4). According to XRD-Rietveld method calculations, the maximum yield of Fe<sub><i>x</i></sub>N was 66 wt %.</p>

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Direct Nitriding of Iron Powder by means of Chemical Oven Technique

  • 期刊论文

  • 发表日期：

    2025年6月23日

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  • T. V. Barinova,
  • E. I. Volchenko,
  • G. R. Nigmatullina,
  • M. I. Alymov

摘要

Abstract

Direct nitriding of spherical microparticles of carbonyl iron powder was carried out by means of chemical oven technique. Experimental selection of highly exothermic mixtures (“chemical ovens”) and nitrogen-containing additives was realized. It was shown that the nitriding products contain Fe3Nx where x ranges from 0.93 to 1.15 as a basis and are represented by spherical core–shell particles where the core is iron and the shell consisting of sub-microcrystals includes Fe, Fe3C, and FexN (x = 3 and 4). According to XRD-Rietveld method calculations, the maximum yield of FexN was 66 wt %.