Abstract―

The aim of this work is to synthesize ceramic composite materials based on aluminum-magnesium spinel strengthened by titanium diboride particles by the self-propagating high-temperature synthesis (SHS) and study the combustion characteristics of synthesized materials, their microstructure, and phase composition. For the synthesis of materials, powders of boron oxide, aluminum, magnesium, and titanium have been used. It is shown that changing the ratio of magnesium and aluminum in the composition of the initial charge results in changes in the phase composition of the synthesis products. As a result of the synthesis, composite materials based on aluminum-magnesium spinel with different contents of aluminum cations have been obtained: MgAl₃O₄, MgAl₂O₄, MgAlO₄, and Mg_1.5Ti_1.5O₄. It is shown that with an increase in the combustion temperature of the studied compositions, the morphology of the particles of the powders obtained with composite structures changes. It is shown that after SHS, crystallites of aluminum-magnesium spinel with a size of about 50 nm are formed.

中文翻译：

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基于铝镁尖晶石和二硼化钛的陶瓷材料自蔓延高温合成

摘要-

本工作的目的是通过自蔓延高温合成（SHS）合成基于二硼化钛颗粒强化的铝镁尖晶石陶瓷复合材料，并研究合成材料的燃烧特性、微观结构和相组成。对于材料的合成，已经使用了氧化硼、铝、镁和钛的粉末。结果表明，改变初始进料组成中镁和铝的比例会导致合成产物的相组成发生变化。合成结果得到了不同铝阳离子含量的铝镁尖晶石复合材料：MgAl ₃ O ₄、MgAl ₂ O₄、MgAlO ₄和Mg _1.5 Ti _1.5 O ₄。结果表明，随着所研究组合物燃烧温度的升高，获得的具有复合结构的粉末颗粒的形态发生变化。结果表明，经过 SHS 处理后，形成了尺寸约为 50 nm 的铝镁尖晶石微晶。