한국안전학회지 (Journal of the Korean Society of Safety)

  • 제29권4호
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  • Pages.34-41
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  • 2014
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  • 1738-3803(pISSN)
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  • 2383-9953(eISSN)
한국안전학회 (The Korean Society of Safety)
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제조 및 작동온도에서 평판형 고체연료전지에 발생한 균열 거동

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

  • 박철준 (부경대학교 대학원 안전공학과) ;
  • 권오헌 (부경대학교 안전공학과) ;
  • 강지웅 (대구한의대학교 보건학부)
  • 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)
  • 투고 : 2014.06.25
  • 심사 : 2014.08.18
  • 발행 : 2014.08.31
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초록

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.

키워드

참고문헌

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