Twinning Mechanism of Solid-State Reactions
M. SH. AKCHURIN, R. M. ZAKALYUKIN and A. A. KAMINSKY
Shubnikov Institute of Crystallography, Russian Academy of Sciences, Leninsky Pr. 59, Moscow 119333 (Russia)
E-mail: akchurin@ns.crys.ras.ru
Keywords: plastic deformation, twinning, mechanosynthesis, solid-state reactions
Pages: 553–559
Abstract
A new mechanism of solid-state reactions, based on a mass transfer process due to the plastic deformation is proposed. By the example of the nucleation in the course of the mechanosynthesis of complex oxides, there has been demonstrated a role of twinning processes in the nucleation of spinel (MgAl2O4), lead titanate (PbTiO3) and yttrium-aluminum garnet (Y3Al5O12) under grinding the powders of MgO + Al2O3, TiO2 + PbO and Al2O3 + Y2O3, respectively. It has been proposed that the mechanical twinning is the main mechanism of mechanochemical solid-state reactions.
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