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• W4385492507 abstract "AbstractIn the present work, we propose a new variant of the model of the composite synthesis under surface heating. We believe that the formation of the composition occurs at the level of reaction cell. The diffusion-controlled process of reduction of one material by another from an oxide is described in the framework of the problem with moving boundaries. It is assumed that the formation of the matrix composition is carried out by the diffusion mechanism. From the position of interfaces, we find the relative volume fractions of oxide phases and the fraction of volume occupied by the matrix. The averaging method of the analysis results at the reaction cell level makes it possible to use these data at the macroscopic level. Volume fractions of phases and average matrix composition (obtained by averaging over the area occupied by the matrix) provide values reflecting the composition of the composite at the macro level. The problem is solved numerically in dimensionless formulation. Dimensionless complexes of physical quantities are distinguished. The estimation of these parameters is performed. The conditions of correctness of the proposed approach are established from comparison of temporal and spatial scales of thermal and diffusion phenomena. A numerical algorithm for the joint solution of macro- and mesolevel problems has been developed. The proposed algorithm makes possible the investigation of the dynamics of composition changes at all points. The model is supplemented by the calculation of stresses and strains from the data on composition and temperature changes in reaction cells. Averaged values of stresses are transferred to macro level.Keywords: composite synthesis two-level modelaccompanying stressesquasi-static approach Disclosure statementNo potential conflict of interest was reported by the author(s).Additional informationFundingThis work was supported by the Russian Foundation for Basic Research (RFBR) [grant number 20-03-00303]." @default.
• W4385492507 created "2023-08-03" @default.
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• W4385492507 date "2023-08-02" @default.
• W4385492507 modified "2023-09-27" @default.
• W4385492507 title "Simulation of reaction initiation in powder compacting from the surface with composite formation in equivalent reaction cell" @default.
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• W4385492507 doi "https://doi.org/10.1080/13647830.2023.2241421" @default.
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