Solidification of the glass-forming Al86Ni2Co6Gd6 melt under high pressure

Авторы: Menshikova S.G., Chtchelkatchev N.M., Brazhkin V.V.
Журнал: Materialia
Том: 28
Год издания: 2023
Издательство: Elsevier Ltd
Местоположение издательства: London
Первая страница: 101713
DOI: 10.1016/j.mtla.2023.101713
Аннотация: High pressure allow the synthesis of new metastable compounds that remain intact for a sufficiently long time at normal conditions. Until now, it has not been fully understood how pressure, glass-forming ability and solidification of liquids are interconnected. We have investigated the structure of the glass-forming eutectic alloy Al86Ni2Co6Gd6 obtained by rapid cooling from the melt having a temperature of 1800 K under a pressure of 10 GPa. X-ray diffraction analysis and electron microscopy show that the samples are homogeneous and dense. The structure is finely dispersed. New stable crystalline phase are formed in the alloy. It is shown that at a temperature of 1800 K, high pressure increases the concentration of icosahedral clusters in the melt so that at 10 GPa atoms inside the icosahedra form a percolation cluster, while at atmospheric pressure they do not.
Добавил в систему: Меньшикова Светлана Геннадьевна

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