Direct observation of thermoelectric magnetic convection in unidirectionally solidified Al-Cu alloys

摘要：

　　This study performed the time-resolved and in-situ observation of unidirectional solidification of Al-Cu and Sn-Bi alloys under a static magnetic field up to 0.45T.In the case of Sn-Bi alloy,the static magnetic field reduced the local convection around the primary dendrite arms.No thermoelectric convection was detected.On the other hand,the thermoelectric convection was clearly observed in Al-Cu alloy.The observed convection was consistently explained by the thermoelectric magnetic convection.According to a simplified model,the thermoelectric magnetic convection can be induced if the difference in the thermoelectric power between the solid and the liquid phases is in the order of 1 μV/K and temperature gradient is several K/mm.

关键词： Static magnetic field natural convection thermoelectric effect dendrite

作者: Hideyuki Yasuda Keisuke Inoue Yudai Minami Tomoya Nagira Masato Yoshiya Kentaro Uesugi Keiji Umetani

作者单位: Department of Adaptive Machine Systems,Osaka University,Osaka 565-0871,Japan Japan Synchrotron Research Institute/SPring-8,Hyogo 679-5198,Japan

会议类型: 国际会议

会议名称: The 7th International Conference on Electromagnetic Processing of Materials(第七届冶金与材料电磁过程国际大会)

会议地点: 北京

会议语种:英文

页码: 1-7

在线出版日期: 2012-10-22（万方平台首次上网日期，不代表论文的发表时间）