Cпекание нанокристаллов UO2 октаэдрической формы при контакте вдоль рёбер: молекулярно-динамическое моделирование

Abstract

The process of sintering UO2 nanocrystals of the regular octahedral shape is studied. The crystals consisted of 5460 ions each and contacted along the edges. In the temperature range from 2300 K to 3000 K, two stages of the process were observed. In the beginning, the crystallites were displaced along the adjacent (111) faces. Then, the contact area increased due to the transfer of matter from the surface of the crystallites. The sintering rate depended exponentially on the inverse temperature.