Effect of metallization on the strength and fracture behaviour of functional co-fired multilayer ceramics. Issue 14 (November 2017)

• Record Type: Journal Article
• Authors: Gruber, M.; Supancic, P.; Aldrian, F.; Bermejo, R.
• Is Part Of: Journal of the European Ceramic Society. Volume 37:Issue 14(2017)
• Page Start: 4389
• Page End: 4396
• Publication Date: 2017-11
• Subjects: Functional ceramic components -- Miniaturized mechanical testing -- Strength distribution -- Damage -- Fractography; Ceramic materials -- Periodicals; Composite materials -- Periodicals; Matériaux céramiques -- Périodiques; Composites -- Périodiques; Ceramic materials; Composite materials; Periodicals; Electronic journals; 666.05
• DOI: 10.1016/j.jeurceramsoc.2017.02.018
• Languages: English
• ISSNs: 0955-2219

Abstract

Abstract: Functional components are commonly fabricated combining a ceramic substrate with external and/or internal metallization. Different layers are printed and fired onto the ceramic part to provide the component with a functionality. As a result of the combination of materials with different coefficients of thermal expansion, internal stresses during the fabrication steps may lead to cracks and/or reduce the strength. In this work, several architectures combining metal and glass layers on the surface of ZnO substrates were analyzed to identify critical fabrication steps in functional co-fired multilayer ceramics. Three-point bending tests were performed on samples taken after different process steps. Experimental results showed a strong effect of the layered architecture on the strength distributions: details of geometrical designs can have a dramatic impact on the strength. Fractographic analyses and ex-situ Focused Ion Beam experiments in pre-loaded samples were the key to assess the location of failure and predict critical configurations.