Journal of the Korean institute of surface engineering (한국표면공학회지)

The Korean Institute of Surface Engineering (한국표면공학회)
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High-temperature Oxidation of Ni-based Inconel 713 Alloys at 800-1100℃ in Air

니켈기 인코넬 713합금의 800-1100℃에서의 대기중 고온산화

  • Lee, Dong-Bok (School of Advanced Materials Science & Engineering, Sungkyunkwan University)
  • 이동복 (성균관대학교 신소재공학부)
  • Received : 2011.08.24
  • Accepted : 2011.10.28
  • Published : 2011.10.31
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Abstract

The Ni-based superalloy, Inconel 713, was oxidized at $800{\sim}1100^{\circ}C$ for 50 and 100 hours in air. It displayed excellent oxidation resistance, forming a few micrometer-thick scales. The major scale was ${\alpha}-Al_2O_3$. Other scales formed were $TiO_2$, $NiAl_2O_4$ and $Cr_2O_3$. Generally, uniform oxidation occurred over the alloy surface, resulting in the formation of ${\alpha}-Al_2O_3$ with and without $Cr_2O_3$. Other oxides such as $TiO_2$ and $NiAl_2O_4$ sometimes also formed. Locally, nodular oxidation occurred at the nodules that consisted of diverse alloying elements. The scales were adherent at $800^{\circ}C$. However, they spalled a little at $900{\sim}1100^{\circ}C$.

Keywords

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