Water vapor effect on high-temperature oxidation behavior of Fe3Al intermetallics
Water vapor effect on high-temperature oxidation behavior of Fe3Al intermetallics
复制标题
DOI：
10.1088/1468-6996/10/4/045006
复制
发表时间：
2009-08
影响因子：
5.5
通讯作者：
S. Chevalier;P. Juzon;K. Przybylski;J. Larpin
中科院分区：
文献类型：
--
作者：
S. Chevalier;P. Juzon;K. Przybylski;J. Larpin
Fe_3Al金属间化合物(Fe_3Al、Fe_3Al-Zr、Fe_3Al-Zr、Mo和Fe_3Al-Zr、Mo、Nb)在950℃干湿(11体积%水)的合成空气中氧化。热重测试表明，受试金属间化合物在潮湿空气中的氧化速率低于在干燥空气中的氧化速率(特别是Fe3Al-Zr，Mo和Fe3Al-Zr，Mo，Nb)。与未掺杂的Fe3Al相比，添加少量的Zr、Mo或Nb改善了动力学性能。Fe_3Al表现为大量的层裂，而Fe_3Al-Zr、Fe_3Al-Zr、Mo和Fe_3Al-Zr、Mo、Nb形成了平坦的附着性氧化层。瞬时氧化铝向α-氧化铝的快速转变可能解释了在潮湿空气中氧化速率降低的原因。
Abstract Fe3Al intermetallics (Fe3Al, Fe3Al-Zr, Fe3Al-Zr,Mo and Fe3Al-Zr, Mo, Nb) were oxidized at 950 °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.