니켈기 인코넬 713합금의 800-1100℃에서의 대기중 고온산화
High-temperature Oxidation of Ni-based Inconel 713 Alloys at 800-1100℃ in Air
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The Ni-based superalloy, Inconel 713, was oxidized at 800∼1100oC for 50 and 100 hours in air. It displayed excellent oxidation resistance, forming a few micrometer-thick scales. The major scale was α-Al2O3. 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 α-Al_2O_3 with and without Cr2O3. 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℃. However, they spalled a little at 900∼1100℃.
Abstract
The Ni-based superalloy, Inconel 713, was oxidized at 800∼1100oC for 50 and 100 hours in air. It displayed excellent oxidation resistance, forming a few micrometer-thick scales. The major scale was α-Al2O3. 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 α-Al_2O_3 with and without Cr2O3. 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℃. However, they spalled a little at 900∼1100℃.
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