The results of studying the particles of the aluminum–modifier–quartz composites after mechanochemical treatment (MCT) in a planetary centrifugal mill by various physicochemical methods are presented. Graphite (C), polyvinyl alcohol (PVA), and stearic acid (SA) are used as modifiers. To increase the dispersive ability of plastic metallic powders (metal–modifier), MCT was performed in the presence of quartz, the weight fraction of which in the composite varies from 5 to 20%. The largest grinding of aluminum particles is observed with an increase in the graphite content from 5 to 20% and SiO₂ content from 5 to 10% in the composition of aluminum–modifier–quartz composites. The particle decreases, while that of crystallites increases with the MCT of the Al–SA–SiO₂ system with an increased quartz content in the composite. The maximal imperfection of aluminum after MCT is characteristic of the Al–SA–5%SiO₂ samples. An increase in the particle size and, correspondingly, a decrease in the specific surface with rather small crystallite sizes are observed after MCT for the Al–PVA–SiO₂ composition. It is shown that the imperfection of the crystalline structure of aluminum particles increases with an increase in the quartz content in the system. The synthesized powder material is a composite formation of aluminum and quartz particles bound by polymer formed based on polyvinyl alcohol in this case. The MCT of the Al–modifier–SiO₂ mixtures results in an increase in the powder activity both due to the accumulation and redistribution of defects in aluminum particles and due to the change of the surface structure due to the incorporation of modifying additives into the destructed oxide layer. The conceptual model of transformation of the surface layer and subgrain structure of aluminum particles during MCT is presented.

中文翻译：

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使用机械化学处理的方法制备用于能量密集型可燃成分的金属粉末：2.机械活化的Al-改性剂-SiO 2混合物的结构和反应性

提出了通过各种物理化学方法在行星式离心机中对经过机械化学处理（MCT）的铝－改性剂－石英复合材料颗粒进行研究的结果。石墨（C），聚乙烯醇（PVA）和硬脂酸（SA）用作改性剂。为了提高塑料金属粉末（金属改性剂）的分散能力，MCT在石英存在下进行，其重量分数在复合材料中为5％至20％。在铝-改性剂-石英复合材料的组成中，观察到最大的铝颗粒研磨，石墨含量从5％增加到20％，SiO ₂含量从5％增加到10％。随Al–SA–SiO ₂的MCT的增加，颗粒减少，微晶的颗粒增加。复合材料中石英含量增加的系统。MCT后铝的最大缺陷是Al–SA–5％SiO ₂样品的特征。在MCT之后，对于Al–PVA–SiO ₂组成，观察到了粒径的增加，相应地，具有较小晶粒尺寸的比表面的减少。结果表明，随着体系中石英含量的增加，铝颗粒晶体结构的不完善性也随之增加。在这种情况下，合成的粉末材料是铝和石英颗粒的复合形成物，并由基于聚乙烯醇的聚合物粘结而成。Al-改性剂-SiO ₂的MCT由于铝颗粒中缺陷的积累和再分布，以及由于将改性添加剂掺入到破坏的氧化物层中引起的表面结构变化，这种混合物导致粉末活性增加。提出了MCT过程中铝颗粒表面层和亚晶粒结构转变的概念模型。