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Effect of temperature on the oxidation of Fe-7.5A1-o.65C alloy

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Abstract

An alloy with the chemical composition Fe-7.5A1-0.65C was employed to investigate the effect of temperature on oxidation between 600 and 900° C in dry air. Kinetic curves were determined by thermogravimetry analyses (TGA). Optical metallography and electron probe microanalysis (EPMA) were used to examine the oxide scales. At 600°C, the initial stage of oxidation followed a parabolic rate law, and oxidation subsequently, increased dramatically. Internal oxidation occurred beneath the nodule formed on the present alloy at 600°C. In contrast, no internal oxidation could be found in specimens of the Fe-7.5A1-0.65C alloy after oxidizing at 700, 800 and 900°C. The kinetic results have two distinct parabolic rates for the present alloy.

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Authors and Affiliations

  1. Institute of Materials Science and Engineering, National Tsing Hua University, Hsinchu, Taiwan

    C. H. Kao & C. M. Wan

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  1. C. H. Kao
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  2. C. M. Wan
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Kao, C.H., Wan, C.M. Effect of temperature on the oxidation of Fe-7.5A1-o.65C alloy. J Mater Sci 23, 1943–1947 (1988). https://doi.org/10.1007/BF01115754

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  • DOI: https://doi.org/10.1007/BF01115754

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