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Vol.51, No.10, 743 ~ 753, 2013
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| Title |
| High Temperature Oxidation Behaviors of Fe-Cr-Al Based Powder Porous Metal and a Strip |
| 임선희 Seon Hui Lim , 오재성 Jae Sung Oh , 공영민 Young Min Kong , 김병기 Byung Kee Kim , 박만호 Man Ho Park , 이기안 Kee Ahn Lee |
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| Abstract |
| This study investigated the high temperature oxidation behaviors of Fe-Cr-Al powder porous metal (565 μm pore size) and a strip (as a reference of bulk material). A 24-hour TGA test was conducted at three different temperatures, 900 ℃, 1000 ℃, and 1100 ℃. High temperature oxidation results showed that the strip exhibited even higher levels of oxidation resistance than that of porous metal regardless of temperature. Oxidation weight gain gradually increased with increasing oxidation temperature. In the porous metal oxidized at 900 ℃ and 1000 ℃, the oxides Al2O3 and Cr2O3 were mainly observed. The porous metal oxidized at 1100 ℃ also revealed the presence of Fe-based oxides in a large quantity in addition to the oxides formed at lower temperature. The porous metal with a larger specific area represented increasingly faster dwindling of Al and Cr elements and easy progress to internal oxidation, compared to the oxidation of the bulk strip. (Received January 28, 2013) |
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| Key Words |
| Foams/Thin films, High temperature oxidation, TGA, thermo gravimetric analysis, Powder porous metals |
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