期刊
CRYSTALLOGRAPHY REPORTS
卷 56, 期 4, 页码 662-669出版社
MAIK NAUKA/INTERPERIODICA/SPRINGER
DOI: 10.1134/S1063774511040080
关键词
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A new size effect has been experimentally found: the mechanochemical synthesis of previously mechanically activated powder mixtures of MgO-Al2O3 oxides with a block size of about 80 nm leads to the formation of MgAl2O4 spinel at room temperature. A model is proposed according to which the mechanism of mechanochemical solid-phase synthesis changes from dislocation transgranular embrittlement to grainboundary sliding, which is accompanied by the generation of dynamic vacancies and low-temperature phase formation via the diffusion-induced migration of grain boundaries.
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