High temperature oxidation behavior and mechanism of Ti3SiC2-SiC nanocomposites in air

Jianfeng Zhang, Lianjun Wang, Wan Jiang, Lidong Chen

    Research output: Contribution to journalArticle

    19 Citations (Scopus)

    Abstract

    In this work, the oxidation kinetics and morphology of the oxide phases of Ti3SiC2-SiC nanocomposites in air from 1000 to 1400 °C is reported. The incorporation of ultra-fine SiC were found to have beneficial effects on the oxidation behavior of Ti3SiC2, and the weight gain decreased with the increment of SiC. The parabolic rate constant of Ti3SiC2-30 vol.%SiC composite oxidized at 1200 °C for 12 h decreased about one order of magnitude compared to that of the monolithic Ti3SiC2. At the same time, the thickness of the oxide scale as well as the oxide surface grain size of Ti3SiC2-30 vol.%SiC composite changed little with the prolonging oxidation time. At above 1200 °C, however, the oxidation process speeded up, and the adhesive and protective oxide scales were destroyed. The worsening oxidation resistance of Ti3SiC2 and the passive-active oxidation transition of ultra-fine grain size of SiC were the possible reasons.

    Original languageEnglish
    Pages (from-to)1531-1538
    Number of pages8
    JournalComposites Science and Technology
    Volume68
    Issue number6
    DOIs
    Publication statusPublished - 2008 May 1

    Keywords

    • A. TiSiC
    • B. Ultra-fine SiC
    • C. Oxidation mechanism

    ASJC Scopus subject areas

    • Ceramics and Composites
    • Engineering(all)

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