Mechanical properties of solid oxide fuel cell glass-ceramic seal at high temperatures

J. Milhans, D. S. Li, M. Khaleel, X. Sun, Marwan S. Al-Haik, Adrian Harris, H. Garmestani

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30 Citations (Scopus)

Abstract

Mechanical properties of solid oxide fuel cell glass-ceramic seal material, G18, are studied at high temperatures. Samples of G18 are aged for either 4 h or 100 h, resulting in samples with different crystallinity. Reduced modulus, hardness, and time-dependent behavior are measured by nanoindentation. The nanoindentation is performed at room temperature, 550, 650, and 750 °C, using loading rates of 5 mN s-1 and 25 mN s-1. Results show a decrease in reduced modulus with increasing temperature, with significant decrease above the glass transition temperature. Hardness generally decreases with increasing temperature, with a slight increase before Tg for the 4 h-aged sample. Dwell tests show that creep increases with increasing temperature, but decrease with further aging.

Original languageEnglish
Pages (from-to)5599-5603
Number of pages5
JournalJournal of Power Sources
Volume196
Issue number13
DOIs
Publication statusPublished - 1 Jul 2011
Externally publishedYes

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Keywords

  • Creep
  • Glass-ceramic
  • High-temperature
  • Nanoindentation

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Energy Engineering and Power Technology
  • Renewable Energy, Sustainability and the Environment
  • Physical and Theoretical Chemistry

Cite this

Milhans, J., Li, D. S., Khaleel, M., Sun, X., Al-Haik, M. S., Harris, A., & Garmestani, H. (2011). Mechanical properties of solid oxide fuel cell glass-ceramic seal at high temperatures. Journal of Power Sources, 196(13), 5599-5603. https://doi.org/10.1016/j.jpowsour.2011.02.033