SURFACE TENSION MEASUREMENT OF HIGH TEMPERATURE LIQUID METALS UNDER WELL CONTROLLED OXYGEN PARTIAL PRESSURE
Surface tension of metallic melt has oxygen partial pressure, PO2, dependence, because the oxygen adsorption on the melt surface affects surface tension to a great extent. However, few data have been reported on the influence of PO2. For measurement of surface tension, a conventional method such as sessile drop method can assure measurement at comparatively low temperature to prevent a reaction between the sample and measurement device. Surface tension of molten iron was measured in consideration of effect of PO2 at high temperature by an oscillating droplet method using an electromagnetic levitation. We successfully measured surface tension of molten iron over a very wide temperature range of 800 K including undercooling condition under a well-controlled PO2 atmosphere. When the PO2 was controlled at 10-2 Pa, the “boomerang shape temperature dependence of surface tension was experimentally observed; surface tension was increased and then decreased with increasing temperature. Furthermore pure surface tension of molten iron was also measured without any contamination such as oxygen adsorption and chemical reaction between the sample and measurement device.
Shumpei Ozawa Shoji Suzuki Suguru Takahashi Taketoshi Hibiya Hiroharu Sugawara Hiroyuki Fukuyama
Department of Aerospace Engineering Tokyo Metropolitan University Tokyo, Japan, 191-0065 Department of Human Mechatronics Systems Tokyo Metropolitan University Tokyo, Japan, 191-0065 Graduate School of System Design and Management Keio University Kanagawa, Japan, 223-8526 Institute of Multidisciplinary Research for Advanced Materials Tohoku University Miyagi, Japan, 980-
国际会议
The Ninth Asian Thermophysical Properties Conference(第九届亚洲热物理性能会议 ATPC 2010)
北京
英文
600-604
2010-10-19（万方平台首次上网日期，不代表论文的发表时间）