论文类型：期刊论文
发表刊物：ACTA METALLURGICA SINICA-ENGLISH LETTERS
收录刊物：Scopus、EI、SCIE
卷号：28
期号：7
页面范围：940-945
ISSN号：1006-7191
关键字：Al alloys; Coarsening; Secondary phase; Droplet particles
摘要：The coarsening process of second-phase droplet in solidifying A1-20 wt% Bi immiscible alloy is in situ studied using synchrotron radiation imaging technology. The collision-induced coarsening and Ostwald coarsening phenomena are directly observed and analyzed. It is found that through observation, collision-induced coarsening phenomenon occurs between droplets with little difference in radius, while Ostwald coarsening phenomenon occurs among droplets with much difference in radius. Moreover, the coarsening rate of Ostwald coarsening is much higher than that of collision-induced coarsening.