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64113016.pdf8.95 MB
title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
Other TitleSynthesis of magnetostrictive SmFe2 with structural and crystalline alignment by unidirectional solidification in microgravity
Author(jpn)奥谷, 猛; 永井, 秀明; 間宮, 幹人
Author(eng)Okutani, Takeshi; Nagai, Hideaki; Mamiya, Mikito
Author Affiliation(jpn)産業技術総合研究所; 産業技術総合研究所; 産業技術総合研究所
Author Affiliation(eng)National Institute of Advanced Industrial Science and Technology; National Institute of Advanced Industrial Science and Technology; National Institute of Advanced Industrial Science and Technology
Issue Date2006-03
PublisherInstitute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)
宇宙航空研究開発機構宇宙科学研究本部
Publication titleSpace Utilization Research: Proceedings of Space Utilization Symposium
宇宙利用シンポジウム
Volume22
Publication date2006-03
Languagejpn
eng
AbstractLaves-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.
DescriptionOriginal contains color illustrations
Meeting Information: The Twenty-second Space Utilization Symposium (January 17-19, 2006: Science Council of Japan, Roppongi, Tokyo, Japan)
Meeting sponsors: The Science Council of Japan, The Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (ISAS)(JAXA)
形態: カラー図版あり
会議情報: 第22回宇宙利用シンポジウム(2006年1月17日-19日, 日本学術会議6階会議室 六本木、東京)
共催: 日本学術会議
Document TypeConference Paper
JAXA Categoryシンポジウム・研究会
NCIDAN10324210
SHI-NOAA0064113016
URIhttps://repository.exst.jaxa.jp/dspace/handle/a-is/13853


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