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Title: Effect of pre-oxidation and environmental aging on the seal strength of a novel high-temperature solid oxide fuel cell (SOFC) sealing glass with metallic interconnect

Abstract

A novel high-temperature alkaline-earth silicate sealing glass was developed for solid oxide fuel cell (SOFC) applications. The glass was used to join two ferritic stainless steel coupons for strength evaluation. The steel coupons were pre-oxidized at elevated temperatures to promote thick oxide layers to simulate long-term exposure conditions. In addition, seals to as-received metal coupons were also tested after aging in oxidizing or reducing environments to simulate the actual SOFC environment. Room temperature tensile testing showed strength degradation when using pre-oxidized coupons, and more extensive degradation after aging in air. Fracture surface and microstructural analysis confirmed that the cause of degradation was formation of SrCrO4 at the outer sealing edges exposed to air.

Authors:
; ;
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
946626
Report Number(s):
PNNL-SA-60713
AA2530000
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article
Journal Name:
Journal of Power Sources, 184(1):238-244
Additional Journal Information:
Journal Name: Journal of Power Sources, 184(1):238-244
Country of Publication:
United States
Language:
English

Citation Formats

Chou, Y S, Stevenson, Jeffry W, and Singh, Prabhakar. Effect of pre-oxidation and environmental aging on the seal strength of a novel high-temperature solid oxide fuel cell (SOFC) sealing glass with metallic interconnect. United States: N. p., 2008. Web. doi:10.1016/j.jpowsour.2008.06.020.
Chou, Y S, Stevenson, Jeffry W, & Singh, Prabhakar. Effect of pre-oxidation and environmental aging on the seal strength of a novel high-temperature solid oxide fuel cell (SOFC) sealing glass with metallic interconnect. United States. https://doi.org/10.1016/j.jpowsour.2008.06.020
Chou, Y S, Stevenson, Jeffry W, and Singh, Prabhakar. 2008. "Effect of pre-oxidation and environmental aging on the seal strength of a novel high-temperature solid oxide fuel cell (SOFC) sealing glass with metallic interconnect". United States. https://doi.org/10.1016/j.jpowsour.2008.06.020.
@article{osti_946626,
title = {Effect of pre-oxidation and environmental aging on the seal strength of a novel high-temperature solid oxide fuel cell (SOFC) sealing glass with metallic interconnect},
author = {Chou, Y S and Stevenson, Jeffry W and Singh, Prabhakar},
abstractNote = {A novel high-temperature alkaline-earth silicate sealing glass was developed for solid oxide fuel cell (SOFC) applications. The glass was used to join two ferritic stainless steel coupons for strength evaluation. The steel coupons were pre-oxidized at elevated temperatures to promote thick oxide layers to simulate long-term exposure conditions. In addition, seals to as-received metal coupons were also tested after aging in oxidizing or reducing environments to simulate the actual SOFC environment. Room temperature tensile testing showed strength degradation when using pre-oxidized coupons, and more extensive degradation after aging in air. Fracture surface and microstructural analysis confirmed that the cause of degradation was formation of SrCrO4 at the outer sealing edges exposed to air.},
doi = {10.1016/j.jpowsour.2008.06.020},
url = {https://www.osti.gov/biblio/946626}, journal = {Journal of Power Sources, 184(1):238-244},
number = ,
volume = ,
place = {United States},
year = {Mon Sep 15 00:00:00 EDT 2008},
month = {Mon Sep 15 00:00:00 EDT 2008}
}