Combined Ageing and Thermal Cycling of Compressive Mica Seals for Solid Oxide Fuel Cells
Abstract
Hybrid Phlogopite mica seals were evaluated in a combined ageing and thermal cycling test. Two interlayers were investigated: a glass and a metallic foil. Samples were first aged at 800 degrees C for {approx}500 or {approx}1000 hrs in a simulated SOFC environment, followed by short-term thermal cycling. The results of hybrid mica with glass interlayer showed extensive reaction and poor thermal cycle stability after ageing for 1036 hrs and 21 thermal cycles. Use of the brazing alloy as the interlayer showed no interaction with mica over 504 hrs, and reasonable leak rates were maintained through eight cycles. The leakage development was found to be consistent with fracture surface and microstructure analyses.
- Authors:
- Publication Date:
- Research Org.:
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 889087
- Report Number(s):
- PNNL-SA-43891
AA2530000; TRN: US200619%%359
- DOE Contract Number:
- AC05-76RL01830
- Resource Type:
- Conference
- Resource Relation:
- Conference: Advances in Solid Oxide Fuel Cells, a collection of papers presented at the 29th International Conference on Advanced Ceramics and Composites, published in Ceramic Engineering and Science Proceedings. , 26(4):265-272
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 30 DIRECT ENERGY CONVERSION; BRAZING ALLOYS; CERAMICS; FRACTURES; GLASS; MICA; MICROSTRUCTURE; SOLID OXIDE FUEL CELLS; STABILITY; THERMAL CYCLING
Citation Formats
Chou, Y S, Stevenson, Jeffry W, and Singh, Prabhakar. Combined Ageing and Thermal Cycling of Compressive Mica Seals for Solid Oxide Fuel Cells. United States: N. p., 2005.
Web.
Chou, Y S, Stevenson, Jeffry W, & Singh, Prabhakar. Combined Ageing and Thermal Cycling of Compressive Mica Seals for Solid Oxide Fuel Cells. United States.
Chou, Y S, Stevenson, Jeffry W, and Singh, Prabhakar. 2005.
"Combined Ageing and Thermal Cycling of Compressive Mica Seals for Solid Oxide Fuel Cells". United States.
@article{osti_889087,
title = {Combined Ageing and Thermal Cycling of Compressive Mica Seals for Solid Oxide Fuel Cells},
author = {Chou, Y S and Stevenson, Jeffry W and Singh, Prabhakar},
abstractNote = {Hybrid Phlogopite mica seals were evaluated in a combined ageing and thermal cycling test. Two interlayers were investigated: a glass and a metallic foil. Samples were first aged at 800 degrees C for {approx}500 or {approx}1000 hrs in a simulated SOFC environment, followed by short-term thermal cycling. The results of hybrid mica with glass interlayer showed extensive reaction and poor thermal cycle stability after ageing for 1036 hrs and 21 thermal cycles. Use of the brazing alloy as the interlayer showed no interaction with mica over 504 hrs, and reasonable leak rates were maintained through eight cycles. The leakage development was found to be consistent with fracture surface and microstructure analyses.},
doi = {},
url = {https://www.osti.gov/biblio/889087},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Jun 30 00:00:00 EDT 2005},
month = {Thu Jun 30 00:00:00 EDT 2005}
}
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