Joining Mechanism of Field-assisted Bonding of Ceramic (Glass) to SiC(p)/Al Composite

Field-assisted diffusion bonding tests are carried out for the joining of borosilicate glass solid electrolyte, (β-Al 2O 3, to SiC(p)/Al composite on a bonding machine in the assistance of static electric field. TEM, SEM, XRD and other means are employed to investigate and analyze microstructure of the interface. The results show that the interface consists of metal-oxides transition zone-ceramic, the oxides transition zone is composed of surface transition layer and inner-transition layer. Solid diffusion joining and static electronic bonding make the joining mechanism. The process of ions flowing and accumulation under electric field is the most essential factor for the anodic oxidation and interfacial joining. Proper temperature and voltage are the basic conditions for the solid diffusion bonding of interfacial oxides. Voltage, temperature, pressure and the condition of the surface are the most important factors which govern the bonding process.