Al2O3焼結体に対するSn-Ti合金のぬれ性
1989 年 53 巻 4 号 p. 439-444
詳細
1989 年 53 巻 4 号 p. 439-444
Wettability of Sn-Ti binary alloys containing up to 5 mass%Ti to sintered alumina plates was studied by measuring wetting angles and surface tensions at a temperature of 1373 K in various O2 partial pressures. The interface energy and work of adhesion between them were also calculated for references. The results obtained are summarized as follows:
(1) Wetting angle of Sn-Ti alloys against sintered Al2O3 plates decreased abruptly with the increase of Ti content in Sn at any O2 partial pressure in ambient atmosphere, especially at a lower PO2 of 2.8×10−4 Pa. The minimal wetting angle was obtained for the Sn-Ti alloy containing about 1 mass% Ti and 3 mass% Ti at PO2=2.8×10−4 and 2.8×10−2 Pa, respectively.
(2) Surface tension (σLA) of Sn-Ti alloys showed almost no dependence on both Ti content in Sn and O2 partial pressure in ambient atmosphere; σLA of Sn-Ti alloys containing up to 5 mass% Ti was almost constant of 4×10−1 N/m.
(3) Wettability of Sn-Ti alloys against sintered Al2O3 plates could be improved by the adsorption or oxygen on the interface of liquid and solid, where the adsorption layer or the reaction layer containing Ti was not found to form on the interface between the alloys and sintered Al2O3 plates.
