Abstract
A solid state bonding method between ceramics and metals using superplastic ceramics as interlayer-materials has been developed. Al_2O_3 was used as ceramics parts to be bonded, Ti-6Al-4V as metals parts, and 3Y-20A, 3Y-40A, 3Y60 as superplastic ceramic interlayer-materials. The superplastic flow that arises at temperatures of about half of the melting point and low applied stress in the superplastic ceramics was applied for the bonding process. The bonding experiments were carried out at different temperatures, bonding-stresses, bonding-times, thickness of the insert and various inserts, and appropriate bonding parameters were discussed. A joint-material having a good microstructure was obtained for Al_2O_3/Ti-6Al-4V at a bonding temperature of 1223-1273K and a bonding time of 15-30min.
