THE PHENOMENON OF WETTING PRECURSOR FILM FOR LIQUID METAL SPREADING ON CERAMICS
液态金属在陶瓷上铺展时的前驱膜现象

The wetting precursor film in liquid metal-ceramic system was first found by Snbased active solders in this paper.The results show that the formation of the film depend on thekinds of the active metal in the solder,ceramics,the third element in the solder and wetting tem-perature.In observation by SEM,the film was composed of a layer of continuous reactive filmwith active metal and many small Sn islands lying on the reactive film.