Flameless combustion of 40% Fe₂O₃ – 40% RDX – 20% HDI (mix I) and 30% CoCO₃ – 15% iron formate – 40% RDX – 15% HDI (mix II) systems was explored by time-resolved X-ray diffraction (TRXRD). In case of mix I, the reaction was found to proceed via the formation of FeO intermediate: Fe₂O₃ → FeO → Fe₃O₄. Variation in the extent of iron reduction was associated with dynamic temperature change and a reductant content of the reaction zone. The reduction proceeded as a solid-state reaction, without amorphization of the structure. The process in system II involved the formation of CoO and FeO intermediates. Further reduction – up to metals – takes place behind the combustion front and yields a mixture of nanosized Co, Fe, and Co_0.7Fe_0.3 particles. Exposure of hot reaction products – nano-sized Co and Fe – to the air leads to their self-ignition and formation of Co₃O₄ and Fe₃O₄, respectively.

中文翻译：

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铁（III）前体在无焰RDX燃烧中的转变

通过时间分辨，探索了40％Fe ₂ O ₃ – 40％RDX – 20％HDI（混合物I）和30％CoCO ₃ – 15％甲酸铁– 40％RDX – 15％HDI（混合物II）系统的无焰燃烧。X射线衍射（TRXRD）。在混合物I的情况下，发现反应通过形成FeO中间体进行：Fe ₂ O ₃ →FeO→Fe ₃ O ₄。铁还原程度的变化与动态温度变化和反应区的还原剂含量有关。还原以固态反应进行，而没有结构的非晶化。系统II中的过程涉及到CoO和FeO中间体的形成。在燃烧前沿之后进一步还原（直至金属），生成纳米级的Co，Fe和Co _0.7 Fe _0.3颗粒的混合物。纳米级Co和Fe的热反应产物暴露于空气中会导致其自燃并分别形成Co ₃ O ₄和Fe ₃ O ₄。