Direct Observation of Thermoelectric Magnetic Convection in Unidirectionally Solidified Al-Cu Alloys

被引：1

作者：

Hideyuki Yasuda ^{[1
]}

Keisuke Inoue ^{[1
]}

Yudai Minami ^{[1
]}

Tomoya Nagira ^{[1
]}

Masato Yoshiya ^{[1
]}

Kentaro Uesugi ^{[2
]}

Keiji Umetani ^{[2
]}

机构：

[1] Department of Adaptive Machine Systems,Osaka University,Osaka 565-0871,Japan

[2] Japan Synchrotron Research Institute/SPring-8,Hyogo 679-5198,Japan

来源：

Journal of Iron and Steel Research(International) | 2012年 / S1期

关键词：

static magnetic field; natural convection; thermoelectric effect; dendrite;

D O I：

10.13228/j.boyuan.issn1006-706x.2012.s1.021

中图分类号：

TG111 [金属物理学];

学科分类号：

0702 ; 070205 ;

摘要：

This study performed the time-resolved and in-situ observation of unidirectional solidification of A1-Cu and Sn-Bi alloys under a static magnetic field up to 0.45 T.Irt 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 1μV/K and temperature gradient is several K/mm.

引用

页码：34 / 39

页数：6

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