한국재료학회지 (Korean Journal of Materials Research)

  • 제13권1호
  • /
  • Pages.36-42
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  • 2003
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  • 1225-0562(pISSN)
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  • 2287-7258(eISSN)
한국재료학회 (Materials Research Society of Korea)
권호 표지
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Fe-l6Cr 페라이틱 합금에 증착된 Y-Cr 이층 박막의 800℃ 열처리 후의 구조 및 전기적 특성

Structural and Electrical Properties of the Y-Cr Bilayer Deposited on Fe-l6Cr Ferritic Alloy after Heat Treatment at 800℃

  • 이용진 (한양대학교 재료공학과) ;
  • 김상우 (한국과학기술연구원 나노재료연구센터) ;
  • 김긍호 (한국과학기술연구원 나노재료연구센터) ;
  • 이종호 (한국과학기술연구원 나노재료연구센터) ;
  • 안진호 (한양대학교 재료공학과)
  • Lee, Yong-Jin (Department of Materials Science and Engineering, Hanyang University) ;
  • Kim, Sang-Woo (Nano-Materials Research Center, KIST) ;
  • Kim, Gyeung-Ho (Nano-Materials Research Center, KIST) ;
  • Lee, Jong-Ho (Nano-Materials Research Center, KIST) ;
  • Ahn, Jin-Ho (Department of Materials Science and Engineering, Hanyang University)
  • 발행 : 2003.01.01
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초록

The oxidation behaviors of Y-Cr bilayer deposited on ferritic steel by magnetron-sputtering for application of the Fe-Cr alloys as interconnectors of planar-type solid oxide fuel cells (SOFCs) were studied. After oxidation at $800^{\circ}C$ for 40 hours, the major phase of $Y_2$$O_3$and the minor phase of $YCrO_3$, $Mn_{1.5}$ $Cr_{1.5}$ $O_4$and Cr$_2$SiO$_4$were formed in the Y/Cr bilayered samples, while the major phase of Cr$_2$O$_3$and the minor phase of $Y_2$$O_3$were formed as the major phase in the Cr/Y bilayered samples. The Log(ASR/T) that expresses electric resistance of the Y/Cr coated specimen with nonconducting $_Y2$$O_3$oxide showed high value of -2.80 Ω$\textrm{cm}^2$$K^{-1}$ / and that of the Cr/Y coated specimen with conducting $Cr_2$$O_3$oxide appeared to be -4.11 Ω$\textrm{cm}^2$$^{K}$ . The electric resistance of the Y/Cr coated specimen was largely increased due to the formation of high resistance oxide scales. However, the Cr/Y coated specimen did not show any increase in the electric resistance and had the long-term stability of oxidation because there was no formation of the secondary phases with low conductivity.

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