Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)(ISAS)
Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)(ISAS)
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）
The rapid solidification process in melt spinning has been empirically deduced from the relationship between the resultant phases/microstructure and the wheel speed, because the melt/substrate interface is difficult to observe directly. The controversy over whether the ribbon solidifies in or outside the melt puddle (thermal or momentum transport control) still remains unsolved. Herein, we report the first in-situ observation of the melt/substrate interface. The Si melt was ejected onto a silicon wafer rotated "transversely" by a vacuum motor in a chamber. The silicon wafer, which is transparent for wavelength > 1.1 mum, can be used as the chill substrate to simulate the rapid solidification on a copper substrate, since the thermal conductivity of silicon is of the same order as that of copper. Successive images captured through the silicon wafer using a high-speed infrared imaging revealed that the ribbon solidified just at the underside of the melt puddle. It was demonstrated that ribbon formation is controlled by thermal transport.
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)
メルトスピンにおける融液/チル板界面の赤外カメラによるその場観察
64113008.pdf
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