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• W4247736375 abstract "This paper provides the first part of the study on the magnesium effect on the structural phase composition, physical and mechanical properties of nanostructured aluminum-magnesium composite materials with the composition Al x Mg y + 0.3 wt.% C 60 fullerene. Composite powders were obtained by the simultaneous mechanical activation of initial materials in a planetary ball mill in an argon atmosphere. It was found that the obtained powders have a complex hierarchical structure made up of 50–200 μm aggregates consisting of 5–10 μm strong high-density agglomerates, which in turn are a combination of nanoscale (30–60 nm) crystallites. It was found that the increase in magnesium concentration in the composite up to 18 wt.% makes it possible to obtain crystallites with an average size of less than 30 nm during mechanical activation, while the size of aggregates is less than 50 μm. The maximum solubility of magnesium in aluminum with a crystallite size of 30–70 nm during mechanical activation was 15 wt.% (17 at.%). Using the differential scanning calorimetry method, it was found that nanostructured composites undergo irreversible structural phase transformations during heat treatment in a temperature range of 250–400 °C: recrystallization, decomposition of the α-solid solution of magnesium in aluminum and formation of intermetallic β-(Al 3 Mg 2 ), γ-(Al 12 Mg 17 ) and carbide (Al 4 C 3 ) phases. In addition, the Raman spectra contain peaks that, according to some sources, correspond to covalent compounds of aluminum with C 60 fullerene – aluminum-fullerene complexes. The data obtained will be used in further research to determine parameters for the thermobaric treatment of nanocmposite powder mixtures in order to obtain and test bulk samples." @default.
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• W4247736375 date "2020-11-16" @default.
• W4247736375 modified "2023-09-27" @default.
• W4247736375 title "Nanostructured strain hardened aluminum-magnesium alloys modified by C₆₀ fullerene obtained by powder metallurgy. Part 1. Effect of magnesium concentration on the structure and phase composition of powders" @default.
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• W4247736375 doi "https://doi.org/10.17073/1997-308x-2020-3-76-84" @default.
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