Surface tension measurement of high temperature melts in consideration of oxygen partial pressure of ambient atmosphere using electromagnetic levitation method
The Twenty-fifth Space Utilization Symposium (January 14-15, 2009: ISAS/JAXA Sagamihara, Japan)
抄録（英）
Surface tension of molten silicon and molten SUS304 stainless steel was measured by oscillating droplet method using electromagnetic levitation method in consideration of oxygen partial pressure (Po(sub 2)) of ambient atmosphere. Surface tension of the molten silicon decreased when Po(sub 2) increased. Furthermore, undercooling level of molten silicon became small with increasing Po(sub 2). Surface tension-temperature coefficient of molten SUS304 stainless steel showed a negative value under Ar/He-H2 gas flow condition. Although the surface tension became a positive value under Ar/He atmosphere below 2080 K, the coefficient was changed from a positive value to a negative value above 2080 K due to desorption of oxygen.
電磁浮遊法による雰囲気酸素分圧依存性を考慮した高温融体の表面張力測定
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