Water vapor effect on high-temperature oxidation behavior of Fe3Al intermetallics

被引：23
|
作者：
Chevalier, Sebastian [1 ]
Juzon, Pitor [1 ,2 ]
Przybylski, Kazimierz [2 ]
Larpin, Jean-Pierre [1 ]
机构：
[1] Univ Bourgogne, CNRS, UMR 5209, Inst Carnot Bourgogne, F-21078 Dijon, France
[2] Univ Sci & Technol, Fac Mat Sci & Ceram, Dept Solid State Chem, Krakow, Poland
来源：
SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS | 2009年 / 10卷 / 04期
关键词：
intermetallic compounds; iron aluminides; water vapor; oxidation; transient alumina phases; ALUMINA-FORMING ALLOY; REACTIVE ELEMENT; FEAL INTERMETALLICS; THERMAL-OXIDATION; IRON; AL; COATINGS; YTTRIUM; MODE; PERFORMANCE;
D O I：
10.1088/1468-6996/10/4/045006
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Fe3Al intermetallics (Fe3Al, Fe3Al-Zr, Fe3Al-Zr, Mo and Fe3Al-Zr,Mo,Nb) were oxidized at 950 degrees C in dry and humid (11 vol% water) synthetic air. Thermogravimetric measurements showed that the oxidation rates of the tested intermetallics were lower in humid air than in dry air (especially for Fe3Al-Zr,Mo and Fe3Al-Zr,Mo,Nb). The addition of small amounts of Zr, Mo or Nb improved the kinetics compared with that of the undoped Fe3Al. Fe3Al showed massive spallation, whereas Fe3Al-Zr, Fe3Al-Zr, Mo and Fe3Al-Zr,Mo,Nb produced a flat, adherent oxide layer. The rapid transformation of transient alumina into alpha alumina may explain the decrease in the oxidation rate in humid air.
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页数：7
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