高温钎料PdCu-Ti在氧化铝陶瓷上的润湿性及界面反应

本文采用座滴法试验研究了合金系统ＰｄＣｕ－Ｔｉ在Ａｌ２Ｏ３上润湿性的变化规律，探讨了界面冶金及结合等行为，运用热力学理论对结果进行了分析，随Ｔｉ含量的增加及Ｐｄ含量的减少润湿角逐渐降低，Ｔｉ的加入使界面发生了一个双重变化；液相侧富氧，钛吸收层的生成及随后的固相侧氧化钛的生成，只有界面上生成一氧化钛，才能有较好的润湿行为和较强的结合力。

Wettability and interfacial metallurgical behaviour of high temperature brazing alloys (PdCu-Ti) on alumina

By using the sessile drop method, the effects of additions on the wettability of a molten alloy Pd₄₈Cu₅₂ on alumina base substrates have been studied. The joining behaviour and the interfacial metallurgical behaviour were investigated. The results of experiments were analysed by means of thermodynamic theories. With the increasing of titanium content, the contact angles were decreased. So did the contact angles of the alloys with the decreasing of palladium content. Due to the addition of Ti in order to improve wettability, a double change at the interface took place: the formation of an adsorption layer rich in oxygen and titanium on the liquid side, than the formation of a titanium oxide layer on the solid side.