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DOE OSTI · 1836469

Evolution of the structure and chemical composition of the interface between multi-component silicate glasses and yttria-stabilized zirconia after 40,000 h exposure in air at 800 °C

Guo, Qianying·Feng, Tianli·Lance, Michael J.·Unocic, Kinga·Pantelides, Sokrates T.·Lara-Curzio, Edgar
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Abstract

The chemical and structural stability of two commercial multicomponent silicate glasses (SCN and G6) in contact with yttria-stabilized zirconia (YSZ) was investigated after exposure times of up to 40,000 h in air at 800 °C. With exposure time, interfacial layers develop at the SCN-YSZ and G6-YSZ interfaces, which were characterized in detail using both quantitative chemical analysis and atomic-resolution imaging. At the SCN-YSZ interface, a Ca-Ba-Si-O reaction phase was found to grow by diffusion control. In G6-YSZ, Raman spectroscopy and electron microscopy revealed a disorganized interfacial reaction later between G6 and YSZ, and the occurrence of cubic to tetragonal to monoclinic phase transformations in YSZ. Finally, this microstructural evolution is discussed in terms of devitrification resistance of glass and diffusion processes at interfaces.

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36 MATERIALS SCIENCEglass sealsmulticomponent silicate glassphase transformationsolid-oxide fuel cellsyttria-stabilized zirconia

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Guo, Qianying, Feng, Tianli, Lance, Michael J., Unocic, Kinga, Pantelides, Sokrates T., Lara-Curzio, Edgar. 2021-11-09. Evolution of the structure and chemical composition of the interface between multi-component silicate glasses and yttria-stabilized zirconia after 40,000 h exposure in air at 800 °C. https://doi.org/10.1016/j.jeurceramsoc.2021.11.013

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