静滴法によるSiと溶融Al-Siの濡れ測定時におけるSiの表面自由エネルギーの変化
1999 年 63 巻 10 号 p. 1356-1362
詳細
1999 年 63 巻 10 号 p. 1356-1362
Wetting phenomenon has been discussed on the basis of the energy balance among solids, liquids and vapors. In these discussions, many researchers have dealt with the surface energy value as an intrinsic parameter. But the extrinsic one, which is changed by the vapor of the liquid, should be used. In this paper we discussed the change in the solid surface energy of solid-Si in the Si/Al-Si systems for equilibrium wetting and nonequilibrium wetting using the sessile drop method. The final objective of this research is the solution of the modification mechanism of Si in Al-Si alloys. The experimental results are as follows;
1. The surface free energy of Si decreases much due to the Al vapor, but the decrease is less at the (111) face than at the other faces.
2. The decreasing rate in Si/Al-Si-Sr systems is much higher than in the Si/Al-Si systems.
3. These phenomena can be recognized by the change in the contact angles with time for the Si/Al-Si and Al-Si-Sr equilibrium systems.
