Phase-boundary grooving at surfaces of solid oxide fuel cell materials

Sanjit Bhowmick, Jessica L. Riesterer, Yuan Xue, C. Barry Carter

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Thermal grooving was studied on the interfaces between two ceramic phases. Specimens of two-phase materials, lanthanum strontium manganite (LSM) and cerium oxide, 50-50 vol%, were prepared by mechanical milling and sintered at 1400 °C for 24 hrs. LSM and ceria are two important components for new generation solid oxide fuel cells (SOFC), and the boundary between these two and gas phase, forming a triple phase boundary (TPB), plays a significant role in the performance of a fuel cell. For the thermal grooving study, LSM-ceria specimens were polished and heat treated at 1400 °C for three annealing times. The phase boundaries were characterized and monitored by FESEM and AFM. It has been noticed that the formation and evolution of grooving at two-phase interfaces are similar to those observed in grain boundaries of single-phase systems. The preliminary data of the groove dimensions are presented.

Original languageEnglish (US)
Title of host publicationAdvances in Solid Oxide Fuel Cells V - A Collection of Papers Presented at the 33rd International Conference on Advanced Ceramics and Composites
PublisherAmerican Ceramic Society
Pages105-112
Number of pages8
Edition4
ISBN (Print)9780470457542
DOIs
StatePublished - Jan 1 2010
EventAdvances in Solid Oxide Fuel Cells V - 33rd International Conference on Advanced Ceramics and Composites - Daytona Beach, FL, United States
Duration: Jan 18 2009Jan 23 2009

Publication series

NameCeramic Engineering and Science Proceedings
Number4
Volume30
ISSN (Print)0196-6219

Conference

ConferenceAdvances in Solid Oxide Fuel Cells V - 33rd International Conference on Advanced Ceramics and Composites
CountryUnited States
CityDaytona Beach, FL
Period1/18/091/23/09

Keywords

  • Ceria
  • LSM
  • Phase boundary
  • Thermal grooving
  • Triple phase boundary

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

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  • Cite this

    Bhowmick, S., Riesterer, J. L., Xue, Y., & Carter, C. B. (2010). Phase-boundary grooving at surfaces of solid oxide fuel cell materials. In Advances in Solid Oxide Fuel Cells V - A Collection of Papers Presented at the 33rd International Conference on Advanced Ceramics and Composites (4 ed., pp. 105-112). (Ceramic Engineering and Science Proceedings; Vol. 30, No. 4). American Ceramic Society. https://doi.org/10.1002/9780470584316.ch9