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Creation of Modified Aluminum Powders with Increased Reactivity for Energy Systems
(Multidisciplinary Digital Publishing Institute, 2025-10-14)
А. Е. Баккара
;
Ainur Khairullina
;
Aida Artykbayeva
;
Alua Maten
;
Aizhan Nugymanova
Aluminium plays a key role in developing modern energy technologies, from electrical systems to high-energy materials, providing a combination of functionality, economy, and reliability, but the oxide film on its particles reduces the effective reactivity. This work aims to increase the reactivity of aluminum powder by mechanochemical treatment using modifiers. The materials used were aluminum powder of the ASD brand and graphite of the GL-1 brand. The experiment subjected aluminum powder to mechanochemical treatment (MCT) with different graphite contents. It was shown that MCT significantly increases active aluminum content in the powder due to partial destruction of the oxide film on its surface. In addition, morphological analyses confirm the destruction of the oxide, the graphite coating, and the appearance of lamellar structures measuring 0–58 µm. Thermal analysis shows that the primary exothermic peak shifts from 662.6 °C to 653.9 °C for Al + 10% graphite, and the heat released increases by 27%, which means lower activation energy and more complete oxidation. However, at 20% graphite, the thermal gain decreases, since carbon shields the metal areas. Thus, the optimal content is 10% graphite: at this ratio, the best thermochemical behavior of the powder is achieved. The data obtained indicate that the MCT of aluminum powder with graphite effectively increases its reactivity. The resulting aluminum powders with modified particle surfaces facilitate the development of new technologies for the creation of various high-energy solid propellant systems. For rocket engines, preference is given to solid rocket propellant (SRP), which is a mixture of substances (components) capable of burning in the absence of air, producing a large amount of gaseous working fluid heated to a high temperature, providing thrust.
Цитирования (OpenAlex) 1
Некоторые метрики заблокированы вашими
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Механохимическая обработка природного сырья и техногенных отходов для получения теплоизоляционных материалов
(2025-10-17)
Alua Maten
;
Bakhtiyar S. Sadykov
;
Aida Artykbayeva
;
А.С. Әділхан
;
Anar Zhapekova
Re-using ash-slag waste from coal-fired power plants for thermal-insulation products offers a viable route to waste valorisation and energy saving. In this work, natural diatomite and ash-slag waste were jointly mechanochemically activated for 20 min in a «NXQM-2A» centrifugal planetary mill (powder-to-ball mass ratio 1:4) and simultaneously modified with graphite. High-energy milling destroyed residual crystalline phases, increased the amorphous aluminosilicate fraction and preserved an intrinsic pore network, which lowered the thermal conductivity of the composites to 0.10-0.12 W/m·K while raising bulk density and compressive strength (diatomite: 5.6-23.2 MPa; fly ash: 10.5-37.6 MPa). Addition of 10 wt % graphite further enhanced the hydrophobicity of diatomite – reducing water uptake by about 50% produced the minimum λ-value (0.11 W/m·K) for the ash-slag system. Conversely, 20 wt% graphite generated excessive macroporosity, lowering strength to 4-2 MPa and diminishing moisture resistance. Thus, mechanochemical activation combined with moderate graphite dosing markedly improves the thermal (lower λ) and mechanical (higher strength) performance of diatomite- and ash-based composites while simultaneously decreasing water absorption. The results confirm the feasibility of upcycling ash-slag waste into high-efficiency insulation materials suitable for building envelopes and other thermal-barrier applications.
Некоторые метрики заблокированы вашими
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Development of optimal modes of mechanochemical treatment of technogenic raw materials with various modifiers to produce heat-insulating materials
(International Union of Pure and Applied Chemistry, 2025-10-27)
Б. С. Садыков
;
Ainur Khairullina
;
Aida Artykbayeva
;
Alua Maten
;
Anar Zhapekova
Abstract This paper presents the results of studies on the effect of mechanochemical treatment (MCT) and modification of technogenic waste based on ash and fly ash. Mechanical modification was carried out using a laboratory ball mill with the addition of organic modifiers to the system. After MCT, the physicochemical properties of the obtained modified ash and fly ash particles were studied. Heat insulators based on ash and slag after MCT have a noticeable positive effect on its rheological properties, improving its structure and heat resistance. Self-propagating high-temperature synthesis (SHS) samples with fly ash after MCT showed a significant decrease in thermal conductivity, which leads to improved heat-insulating properties. The obtained samples based on technogenic waste are effective heat-resistant and environmentally friendly materials that are superior to many traditional analogues.
Цитирования (OpenAlex) 1

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