Effect of niobium on the oxidation behavior of TiAl

Wei Lu, Chun Lin Chen, Lian Long He, Yan Jun Xi, Fu Hui Wang

    Research output: Contribution to journalArticlepeer-review

    14 Citations (Scopus)

    Abstract

    Two TiO2 layers formed in TiAl oxidation for 50 h at 900 °C were studied using scanning transmission electron microscopy. The main efforts were placed on the investigation of the distribution of niobium. It was found that Nb enriched in TiO2 grains of mixture layer but did not exist in the outer TiO2 layer. High-resolution electron microscopy (HREM) Z-contrast image revealed that Nb substitute for Ti site leading to Nb enrichment in TiO2 grains of the mixture layer. The formation mechanism of the two TiO2 layers and the potential effect of Nb doping in the mixture layer were also discussed.

    Original languageEnglish
    Pages (from-to)1486-1490
    Number of pages5
    JournalJournal of Materials Research
    Volume22
    Issue number6
    DOIs
    Publication statusPublished - 2007 Jun

    ASJC Scopus subject areas

    • Materials Science(all)
    • Condensed Matter Physics
    • Mechanics of Materials
    • Mechanical Engineering

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