Synthesis of Oxynitride Composites during Combustion of a Ferrosilicon–Natural Mineral–Aluminum Mixture in Nitrogen

IF 0.9 4区 工程技术 Q4 ENERGY & FUELS Combustion, Explosion, and Shock Waves Pub Date : 2024-04-22 DOI:10.1134/s0010508224010088
O. G. Kryukova, A. A. Nevmyvaka, A. A. Akulinkin, T. V. Tatarinova
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Abstract

Targeted synthesis of oxynitride composites is implemented by means of organizing coupled processes. Interaction of ferrosilicon with nitrogen during combustion is considered as the main (inducing) process. The phase composition of the products of the coupled processes is determined by the chemical and phase compositions of the components added to ferrosilicon before performing self-propagating high-temperature synthesis. The influence of the basic products of the synthesis on the burning rate, fraction of nitrogen, phase composition, and morphology of synthesis products is considered. Chemical stages of ferrosilicon interaction with additives of natural minerals (zircon, ilmenite, and shungite) and aluminum in a nitrogen medium are demonstrated. The phase composition is determined by chemical transformations in a combustion wave. It is found that addition of aluminum leads to reduction or elimination of the Si2N2O phase in synthesis products with an increase in the aluminum fraction and obtaining composites based on the Si3N4 (SiAlON) solid solution. The microstructure of combustion products is presented by aggregates (5–10 \(\mu\)m) composed of small faceted crystals, shapeless structures, and crystal flakes. Oxynitride composites with an open porosity value of 51.0–68.8% are obtained.

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在氮气中燃烧硅铁-天然矿物-铝混合物时合成氮氧化物复合材料
摘要通过组织耦合过程实现氮氧化物复合材料的定向合成。燃烧过程中硅铁与氮气的相互作用被视为主要(诱导)过程。耦合过程产物的相组成由在进行自推进高温合成之前添加到硅铁中的组分的化学成分和相组成决定。研究考虑了合成的基本产物对合成产物的燃烧速率、氮组分、相组成和形态的影响。演示了硅铁与天然矿物(锆石、钛铁矿和霰石)和铝的添加剂在氮介质中相互作用的化学阶段。相组成由燃烧波中的化学变化决定。研究发现,铝的添加会导致合成产物中 Si2N2O 相的减少或消除,同时铝的比例也会增加,从而获得基于 Si3N4 (SiAlON) 固溶体的复合材料。燃烧产物的微观结构是由小切面晶体、无形结构和晶体片组成的聚集体(5-10 \(\mu\)m)。氮氧化物复合材料的开孔率为 51.0%-68.8%。
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来源期刊
Combustion, Explosion, and Shock Waves
Combustion, Explosion, and Shock Waves 工程技术-材料科学:综合
CiteScore
1.60
自引率
16.70%
发文量
56
审稿时长
5.7 months
期刊介绍: Combustion, Explosion, and Shock Waves a peer reviewed journal published in collaboration with the Siberian Branch of the Russian Academy of Sciences. The journal presents top-level studies in the physics and chemistry of combustion and detonation processes, structural and chemical transformation of matter in shock and detonation waves, and related phenomena. Each issue contains valuable information on initiation of detonation in condensed and gaseous phases, environmental consequences of combustion and explosion, engine and power unit combustion, production of new materials by shock and detonation waves, explosion welding, explosive compaction of powders, dynamic responses of materials and constructions, and hypervelocity impact.
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