Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
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High Temperature Oxidation Behaviour of Fe-XAl-0.1Y(X = 5, 10, 14 wt.%) Alloys

Fe-XAl-0.1Y(X =5, 10, 14 wt.%) 합금의 고온 산화거동

  • Lee, Byung-Woo (Division of Materials Science and Engineering, Pukyong National Univ.) ;
  • Seo, Won-Chan (Division of Materials Science and Engineering, Pukyong National Univ.) ;
  • Park, Chan (Division of Materials Science and Engineering, Pukyong National Univ.)
  • 이병우 (부경대학교 신소재공학부) ;
  • 서원찬 (부경대학교 신소재공학부) ;
  • 박찬 (부경대학교 신소재공학부)
  • Published : 2003.12.01
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Abstract

The oxidation behaviour of Fe-XAl-0.1Y(X= 5, 10, 14 wt.%) alloys were investigated at 1073, 1173 and 1273 K in oxygen/ nitrogen gas atmosphere for 1∼24 hrs using SEM/EDX, XRD and EPMA. The weight changes of Fe-XAl-0.1Y alloys followed the parabolic rate law. Oxidation rates of 10Al and 14Al alloys were ten times lower than that of 5Al alloys. This is attributed to the formations of protective $A1_2$$O_3$oxides on the surface of 10Al and 14Al alloys. The oxidation product scales of the 5Al alloy showed that thick iron oxide scales($Fe_2$$O_3$, $Fe_3$$O_4$) containing porosities formed during early stages of oxidation. With continued oxidation, aluminum oxide was formed at the alloy/scale interface.

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