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

doi:10.1016/j.jpowsour.2011.02.033

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

Research output: Contribution to journal › Article › peer-review

35 Scopus citations

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 language	English
Pages (from-to)	5599-5603
Number of pages	5
Journal	Journal of Power Sources
Volume	196
Issue number	13
DOIs	https://doi.org/10.1016/j.jpowsour.2011.02.033
State	Published - Jul 1 2011
Externally published	Yes

Funding

The Pacific Northwest National Laboratory is operated by Battelle Memorial Institute for the United States Department of Energy under Contract DE-AC06-76RL01830. The work summarized in this report was funded as part of the Solid-State Energy Conversion Alliance (SECA) Core Technology Program by the U.S. Department of Energy's National Energy Technology Laboratory (NETL) . Funding was additionally provided by the Boeing Fellowship .

Keywords

Creep
Glass-ceramic
High-temperature
Nanoindentation

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10.1016/j.jpowsour.2011.02.033

Cite this

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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.",

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AU - Li, D. S.

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AU - Harris, Adrian

AU - Garmestani, H.

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AB - 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.

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

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Keywords

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