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Oxidation of SiOC/MoSi2/SiC Composites Prepared by Polymer Pyrolysis

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Abstract

From the pre-ceramic polymer of polymethylsiloxane (PMS) and powders of MoSi2, SiC and Si, new ceramic composites that consisted primarily of an amorphous SiOC matrix containing dispersed particles of MoSi2 and SiC were synthesized. The composites displayed superior oxidation resistance at both high and low temperatures by forming SiO2 on the surface. The thin, amorphous SiO2 layer that formed initially gradually to crystallized during oxidation between 1000 and 1300°C. An outer highly porous and an inner superficial SiO2 layer that formed from the initial stage of oxidation between 400 and 500°C protected the composites from pesting.

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Authors and Affiliations

  1. School of Metallurgical and Materials Engineering, Sungkyunkwan University, Suwon, 440-746, South Korea

    D. B. Lee & D J. Kim

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  1. D. B. Lee
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  2. D J. Kim
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Correspondence to D. B. Lee.

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Lee, D.B., Kim, D.J. Oxidation of SiOC/MoSi2/SiC Composites Prepared by Polymer Pyrolysis. Oxidation of Metals 61, 423–437 (2004). https://doi.org/10.1023/B:OXID.0000032332.27318.9b

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  • DOI: https://doi.org/10.1023/B:OXID.0000032332.27318.9b

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