STABILITY OF MICROSTRUCTURES DURING COOLING PROCESSES OF Al LIQUID METAL
来源期刊：中国有色金属学报(英文版)1998年第4期
论文作者：Liu Rangsu Li Jiyong Zhou Zheng Dong Kejun Peng Ping Xie Quan Zheng Caixing
文章页码：533 - 538
Key words：stability, microstructure ,liquid metal ,rapid cooling, computer simulation
Abstract: From the molecular dynamics simulation on the microstructural transitions of Al liquid metal during rapid cooling processes, it is demonstrated that various aggregates are formed accidentally and randomly in both liquid state and glassy state, however, once they have been formed, some of them are relatively stable and can not be dissociated in the following runs. As an example, the stability of icosahedral aggregates can be expressed quantitatively by their lifetime or repeating times, some aggregates can be created repeatedly in both isothermal process and rapid cooling processes. The lifetimes of these aggregates generally increase with decreasing temperature, and increase remarkably below the glass transition temperature Tg. The number of aggregates having a longer lifetime also increases with decreasing temperature.
