Viscosity measurement of melt at high pressure
利用事例本文
Viscosity of melt under high pressure has been measured using a falling sphere method, where the viscosity is determined by the sinking velocity of sphere using Stokes equation. An x-ray radiography technique with synchrotron radiation is very useful for the falling sphere viscosity measurement, because it enables us in situ observation of the sinking process and determination of the reliable viscosity. Figure shows the observed images of Pt sphere sinking in NaAlSi3O8 melt at high pressure and high temperature using the SPEED-1500. The high-speed and high-resolution CCD camera provided very good visual contrast between the Pt sphere and melt possible in a short exposure time (1/30 s). The high pressure viscometry using the X-ray radiography technique is very promising for the precise viscosity measurement to various melts in Earths interior, such as magma and outer core melt.
Fig. Real-time images of Pt sphere sinking in NaAlSi3O8 melt at high pressure and high temperature (4.2 GPa and 1700℃).
[ K. Funakoshi, A. Suzuki and H. Terasaki, Journal of Physics :Condensed Matter 14, 11343-11347 (2002), Fig. 3,
©2002 Institute of Physics and IOP Publishing, Ltd. ]
学術利用キーワード
| A. 試料 | 無機材料, 計測法、装置に関する研究 |
|---|---|
| B. 試料詳細 | 金属・合金, 絶縁体・セラミックス, 液体・融体 |
| C. 手法 | 透過Ｘ線計測, 吸収、及びその二次過程 |
| D. 手法の詳細 | |
| E. 付加的測定条件 | 高圧（大型プレス）, 応力付加、変形, 高温（>>500度）, 時分割（マイクロ秒） |
| F. エネルギー領域 | Ｘ線（>40 keV） |
| G. 目的・欲しい情報 | 結合状態, 構造変化, 形態・巨視的構造 |
産業利用キーワード
| 階層1 | 工業材料, その他 |
|---|---|
| 階層2 | |
| 階層3 | |
| 階層4 | 液体・非晶質構造 |
| 階層5 | イメージング |
問い合わせ番号
SOL-0000001204