Effect of Brownian Coagulation on the Liquid-liquid Decomposition in Gas-atomized Alloy Drops  

作　　者：Jiuzhou ZHAO Lingling GAO Jie HE L.Ratke 

机构地区：[1]Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang 110016, China [2]The Institute for Space Simulation, DLR, 51140 Cologne, Germany

出　　处：《Journal of Materials Science & Technology》2006年第3期321-323,共3页材料科学技术（英文版）

基　　金：The authors gratefully acknowledge the financial support from the National Natural Science Foundation （NNSF） of China and the International Cooperation Key Project of NNSF of China （Nos. 50395104, 50271076 and 50371092）;the Natural Science Foundation of Liaoning Province （20050047）.

摘　　要：Modeling and simulation have been carried out for Al-Pb alloys to investigate the Brownian coagulation effect on the microstructure development in a gas-atomized drop during the liquid-liquid decomposition. The results indicate that Brownian coagulation has a weak effect on the nucleation and a relatively strong effect on coarsening the minority phase droplets. The influence of Brownian coagulation on the liquid-liquid decomposition decreases with the increase in the diameter （or the decrease in the cooling rate） of the atomized drop.Modeling and simulation have been carried out for Al-Pb alloys to investigate the Brownian coagulation effect on the microstructure development in a gas-atomized drop during the liquid-liquid decomposition. The results indicate that Brownian coagulation has a weak effect on the nucleation and a relatively strong effect on coarsening the minority phase droplets. The influence of Brownian coagulation on the liquid-liquid decomposition decreases with the increase in the diameter （or the decrease in the cooling rate） of the atomized drop.

关 键 词：Immiscible alloy Rapid solidification ATOMIZATION Brownian coagulation Modeling 

分 类 号：TG132.32[一般工业技术—材料科学与工程]