Effect of rotating magnetic field on the solidification microstructures of Pb-Sn alloys  

作　　者：MENG Xiaohua CHEN Changle HONG Zhenyu WANG Jianyuan 

机构地区：[1]Department of Applied Physics, Northwestern Polytechnical University, Xi'an 710072, China Department of Applied Physics, Northwestern Polytechnical University, Xi'an 710072, China Department of Applied Physics, Northwestern Polytechnical University, Xi'an 710072, China Department of Applied Physics, Northwestern Polytechnical University, Xi'an 710072, China

出　　处：《Science China(Technological Sciences)》2006年第3期274-282,共9页中国科学（技术科学英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.50331040 and 60171034).

摘　　要：The influence of the rotating magnetic field (RMF) on the solidification process of Pb-Sn binary alloys is studied by comparing the solidification microstructures under the common condition; RMF condition. It is found that the RMF can completely eliminate the gravity induced macrosegregation,; result in dendrite fragmentation; promote solute diffusion velocity. These differences are regarded as the effect of complicated melt flow caused by RMF. Moreover, when the content of the primary phase is small, many spherical microstructures form under the RMF condition. The analyses indicate that these special microstructures are likely the conjunction action of melt flow; concentration; temperature field uniformity caused by RMF.

关 键 词：ROTATING magnetic field  macrosegregation  DENDRITE fragmentation  MELT flow. 

分 类 号：TH[机械工程]