@inproceedings{oai:jaxa.repo.nii.ac.jp:00013084,
 author = {渡邉, 匡人 and 小澤, 俊平 and 水野, 章敏 and 日比谷, 孟俊 and 田川, 俊夫 and 塚田, 隆夫 and 杉岡, 健一 and 福山, 博之 and 小畠, 秀和 and 田中, 敏宏 and 吉川, 健 and 安田, 秀幸 and 景山, 大郎 and 石川, 毅彦 and Watanabe, Masahito and Ozawa, Shunpei and Mizuno, Akitoshi and Hibiya, Taketoshi and Tagawa, Toshio and Tsukada, Takao and Sugioka, Kenichi and Fukuyama, Hiroyuki and Kobatake, Hidekazu and Tanaka, Toshihiro and Yoshikawa, Ken and Yasuda, Hideyuki and Kageyama, Dairo and Ishikawa, Takehiko},
 book = {宇宙利用シンポジウム: 第27回: 平成22年度, Space Utilization Research, Vol. 27 2011: Proceedings of The Twenty-seventh Space Utilization Symposium},
 month = {Mar},
 note = {第27回宇宙利用シンポジウム (2011年1月24日-25日, 宇宙航空研究開発機構宇宙科学研究所相模原キャンパス), 相模原市, 神奈川県, The Twenty-seventh Space Utilization Symposium (January 24-25, 2011. Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)(ISAS)), Sagamihara, Kanagawa Japan, Microgravity conditions have advantages of measurement of surface tension and viscosity of metallic liquids by the oscillating drop method with an electromagnetic levitation (EML) device. Recently, it has been identified that dependence of surface tension on oxygen partial pressure (Po2) must be considered for industrial application of surface tension values. Effect of Po2 on surface tension would apparently change viscosity. Therefore, surface tension and viscosity must be measured simultaneously in the same atmospheric conditions. Moreover, effect of the electromagnetic force (EMF) on the surface oscillations must be clarified to obtain the ideal surface oscillation because the EMF works as the external damping force to the oscillating liquid droplets, so extensive EMF makes apparently the viscosity values large. In our working group (WG), using the parabolic flight levitation experimental facilities (PFLEX) the effects of Po2 and external EMF on surface oscillation of levitated liquid droplets are systematically investigated for the precise measurements of surface tension and viscosity of high temperature liquids. In this year we performed the observation of surface oscillations of levitated liquid Si-Ge alloys using PFLEX on board flight experiments by G-II operated by DAS. The density of liquid Si-Ge was measured by using electromagnetic levitation with a static magnetic field. In these experiments, we obtained the density, the viscosity and the surface tension values. From these measurements, we discussed surface segregation in systems forming intermetallic compounds. The composition dependence of surface tension was expressed by a modified ideal solution model. On the basis of activity of our working group and European WG, we have been preparing the research of thermophysical properties measurement of high-temperature liquids under microgravity conditions in ISS from 2011-2012., 著者人数: 18人, 形態: カラー図版あり, Number of authors: 18, Physical characteristics: Original contains color illustrations, 資料番号: AA0065129024},
 pages = {62--65},
 publisher = {宇宙航空研究開発機構宇宙科学研究所 (JAXA)(ISAS), Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)(ISAS)},
 title = {WG活動報告 微小重力下での酸素分圧制御による金属性融体の表面張力測定},
 volume = {27},
 year = {2011}
}