A study on elements diffusion between metal-ceramic interface and ceramic-ceramic interface

Objective:To compare the bond mechanism and microscopic structures between metal-ceramic and ceramic-ceramic interfaces.Methods:Specimens of alumina glass-infiltrated(15 mm×5 mm×1 mm)and cobalt-chromium alloy(15 mm×5 mm×1 mm)were fabricated,veneering porcelains were sintered on the specimen's surface.Then the bilayered composites were fractured,invested and polished for scanning electron microscopy(SEM)and energy spectrum analysis.Results:Ceramic/ceramic interface showed tighter connection than metal-ceramic interface.Diffusion of Cr,O,Si across metal-ceramic interface and Si,Al,K across ceramic-ceramic interface were confirmed by energy spectrum analysis.Conclusion:Chemical bond is found between both metal-ceramic and ceramic-ceramic interface.The connection of ceramic-ceramic is smoother and tighter than metal-ceramic interface.