| Budget Amount *help |
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2014: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2013: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2012: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
|
|---|
| Outline of Final Research Achievements |
Surface tension of molten metals and alloys were measured by the electromagnetic levitation technique over wide temperature range in consideration of influence of oxygen activity. When oxygen activity was fixed at comparatively high value, boomerang shape temperature dependence of surface tension was observed for molten iron, nickel, and copper.
When the H2-containing gas with a constant concentration was used as an atmosphere for the measurement, a peculiar kink was discovered in the temperature dependence of surface tension for molten iron and nickel. It was explained by considering the competition between the temperature dependence of oxygen activity and that of the equilibrium constant of oxygen adsorption.
Since surface tension of molten silicon is lower than that of molten iron, it was expected that the surface tension of molten Fe-Si alloy is decreased with increasing silicon concentration. However increases of silicon concentration induced higher surface tension of molten sample.
|
