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Thermal expansion coefficient of alumina films developed by oxidation of a FeCrAl alloy determined by a deflection technique

机译:通过偏转技术确定的FeCrAl合金氧化产生的氧化铝膜的热膨胀系数

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摘要

Thermal expansion coefficients of alpha alumina films formed by oxidation of an oxide dispersion strengthened (ODS) FeCrAl alloy have been determined between 20 and 900 degrees C using an original deflection test. This technique is based on the curvature of a dissymmetrical sample consisting of a thin and elongated metallic substrate covered on one of its large sides by an oxide film. The average value of the expansion coefficient of the compact columnar alpha alumina film is found to equal 10.3 x 10(-6) K-1 which is higher than most values given in the literature. (c) 2005 Elsevier B.V. All rights reserved.
机译:使用原始挠度测试,已经确定了通过氧化弥散强化(ODS)FeCrAl合金氧化而形成的α氧化铝膜的热膨胀系数。该技术基于不对称样品的曲率,该样品由薄而细长的金属基底组成,该基底在其大侧面之一上被氧化膜覆盖。发现致密的柱状α-氧化铝膜的膨胀系数的平均值等于10.3×10(-6)K-1,其高于文献中给出的大多数值。 (c)2005 Elsevier B.V.保留所有权利。

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