Journal of the Korean Society of Safety (한국안전학회지)

The Korean Society of Safety (한국안전학회)
권호 표지
DOI QR코드

DOI QR Code

The Crack Behavior in the Planar Solid Oxide Fuel Cell under the Fabricating and Operating Temperature

제조 및 작동온도에서 평판형 고체연료전지에 발생한 균열 거동

  • Park, Cheol Jun (Graduate School of Department of Safety Engineering, Pukyong National University) ;
  • Kwon, Oh Heon (Department of Safety Engineering, Pukyong National University) ;
  • Kang, Ji Woong (Faculty of Health Science, Daegu Haany University)
  • 박철준 (부경대학교 대학원 안전공학과) ;
  • 권오헌 (부경대학교 안전공학과) ;
  • 강지웅 (대구한의대학교 보건학부)
  • Received : 2014.06.25
  • Accepted : 2014.08.18
  • Published : 2014.08.31
Download PDF
⟨ Previous Next ⟩

Abstract

The goal of this study is to investigate some crack behaviors which affect the crack propagation angle at the planar solid oxide fuel cell with cracks under the fabricating and operating temperature and analyze the stresses by 3 steps processing on the solid oxide fuel cell. Currently, there are lots of researches of the performance improvement for fuel cells, and also for the more powerful efficiency. However, the planar solid oxide fuel cell has demerits which the electrode materials have much brittle properties and the thermal condition during the operating process. It brings some problems which have lower reliability owing to the deformation and cracks from the thermal expansion differences between the electrolyte, cathode and anode electrodes. Especially the crack in the corner of the electrodes gives rise to the fracture and deterioration of the fuel cells. Thus it is important to evaluate the behavior of the cracks in the solid oxide fuel cell for the performance and safety operation. From the results, we showed the stress distributions from the cathode to the anode and the effects of the edge crack in the electrolyte and the slant crack in the anode. Futhermore the crack propagation angle was expected according to the crack length and slant angle and the variation of the stress intensity factors for the each fracture mode was shown.

Keywords

References

  1. W. Z. Zhu and S. C. Deevi, "A Review on the Status of Anode Materials for Solid Oxide Fuel Cells", Materials Science & Engineering, A, Vol. 362, pp. 228-239, 2003. https://doi.org/10.1016/S0921-5093(03)00620-8
  2. S. D. Vora, in: A. J. McEvoy, Proceedings of the 4th European Solid Oxide Fuel Cell Forum, Vol.2, Lucerens, Switzerland, 10-14 July, p.175, 2000.
  3. J. Qu., A. Fedorov, S. Graham and C. Haynes, "Integrated Approach to Modeling and Mitigrating SOFC Failure", U.S. Department of Energy, Fy Annual Report, pp.167-172, 2004.
  4. S. R. Choi and N. P. Bansal, "Alumina Reinforced Zircornia Composites", NASA/TM-2003-212701, pp.1-17, 2003.
  5. N. Joulae, A. Makradi, S. Ahzi and M. A. Khaleel, B.K. Koeppel, "Prediction of Crack Propagation Paths in the Unit Cell of SOFC Stacks", International Journal of Mechanical Material Design, Vol.5, pp.217-230, 2009. https://doi.org/10.1007/s10999-009-9095-5
  6. B. N. Nguyen, B. J. Koeppel, S.Ahzi, M.A. Khaleel and P. Singh, "Crack Growth in Solid Oxide Fuel Cell Materials:from Discrete to Continuum Damage Modeling", Journal of American Ceramic Society, Vol.89, No.4, pp.1358-1368, 2006. https://doi.org/10.1111/j.1551-2916.2005.00874.x
  7. T. Zhang, Q. Zhu, W. L Huang, Z. Xie and X. Xin, "Stress Field and Failure Probability Analysis for the Single Cell of Planar Solid Oxide Fuel Cells", Journal of Power Sources, Vol.182, pp.540-545, 2008. https://doi.org/10.1016/j.jpowsour.2008.04.027
  8. M. Radovic and F. Lara-Curzio, "Mechanical Properties of Tape Casting Nickel-based Anode Materials for Solid Oxide Fuel Cell before and after Reduction in Hydrogen", Acta Materials, Vol.52, pp.5747-5756, 2004. https://doi.org/10.1016/j.actamat.2004.08.023
  9. M. Radovic and F. Lara-Curzio, "Elastic Properties of a Nickel-based Anode Materials for Solid Oxide Fuel Cell as a Function of the Fractional Reduced NiO", Journal of American Ceramic Society, Vol.87, No.12, pp.2242-2246, 2004. https://doi.org/10.1111/j.1151-2916.2004.tb07499.x
  10. F. Tietz, "Thermal Expansion of SOFC materials", Ionics, Vol.5, pp.129-139, 1999. https://doi.org/10.1007/BF02375916
  11. C. J. Park, O. H. Kwon and J. W. Kang, "A basic Study on the Stress Field in the Electrode Interface of the Planar SOFc Single Cells", Journal of the Korean Society of Safety, Vol.28, No.5, pp.5-9, 2013. https://doi.org/10.14346/JKOSOS.2013.28.5.5
  12. D. Broek , Elementary Engineering Fracture Mechanics, Leyden: Noodhoff International Publishing; 1974.
  13. P. Isaksson and P. Stahle, "Mode II Crack Paths under Compression in Brittle Solids", Solids and Structures, Vol.39, pp.2281-2297, 2002. https://doi.org/10.1016/S0020-7683(02)00089-6
  14. J. Laurencin, G. Delette, F. Lefebv-joud and M. Dupeux, Journal of European Ceramic Society, Vol.28, pp.1857-1869, 2008. https://doi.org/10.1016/j.jeurceramsoc.2007.12.025
  15. H. Yakabe, Y. Baba, T. Sakurai, M. Satoh, I. Hirosawa and Y. Yoda, "Evaluation of Residual Stresses in a SOFC Stack", Journal of Power Sources, Vol. 131, pp. 278-284, 2004. https://doi.org/10.1016/j.jpowsour.2003.12.057