National Institute of Advanced Industrial Science and Technology
National Institute of Advanced Industrial Science and Technology
National Institute of Advanced Industrial Science and Technology
出版者
宇宙航空研究開発機構宇宙科学研究本部
出版者（英）
Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)
雑誌名
宇宙利用シンポジウム
雑誌名(英)
Space Utilization Research: Proceedings of Space Utilization Symposium
The Twenty-second Space Utilization Symposium (January 17-19, 2006: Science Council of Japan, Roppongi, Tokyo, Japan)
抄録（英）
Laves-phase rare-earth-iron intermetallic compounds such as SmFe2 are giant magnetostrictive materials with a deformation more than 1000 ppm which are used as element of linear actuator, magnetic sensor and so on. High performance SmFe2 should be single crystal or have [111] crystal plane alignment as the same direction of the deformation and easy magnetization. However, these single crystals are very difficult to grow due to double peritectic structure formation during solidification. SmFe2 with [111] crystal plane alignment are also difficult to synthesize by solidification from the melts due to convection. In microgravity, convection in melt is suppressed, and weak magnetic flux and temperature gradient show remarkable effect. We were successful in controlling the planar structure with <111> alignment of SmFe2 by unidirectional solidification in microgravity. SmFe2 synthesized in microgravity had larger magnetostriction and more sensitive response against loaded magnetic field than that synthesized in normal gravity.
内容記述
形態: カラー図版あり
共催: 日本学術会議
内容記述（英）
Physical characteristics: Original contains color illustrations
Meeting sponsors: The Science Council of Japan, The Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (ISAS)(JAXA)
微小重力下の一方向凝固による結晶・構造制御 SmFe2 超磁歪材の合成
64113016.pdf
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