Interfacial engineering of glass-ceramic/steel joints using ceramic interlayers: designing thermoelastic stress and chemical stability

Abstract

As a potentially effective strategy to improve the chemistry and mechanics of the interface of glass-based/steel joints for high-temperature applications, the role of three ceramic interlayers, including 8% molY2O3-ZrO2 (8YSZ), MnCo2O4 and Al2O3, was examined using thermoelastic multilayer stress modeling, aging-dependent stress evolution, and detailed chemical/microstructural characterization. Mapping the in-layer stress reveals that the thermoelastic properties of the interlayer govern the residual stress distribution in glass/steel joints, enabling the rational design of mechanically stable interfaces for high-temperature sealing systems. The combined mechanical and chemical assessments demonstrate that 8YSZ is the most reliable interlayer for suppressing detrimental seal/interconnect interactions in high-temperature operating conditions.