(S)TEM study of different stages of Ti-45Al-8Nb-0.2W-0.2B-0.02Y alloy oxidation at 900 °C

W. Lu, C. L. Chen, L. L. He, F. H. Wang, J. P. Lin, G. L. Chen

    研究成果: Article査読

    34 被引用数 (Scopus)

    抄録

    The oxidation process of Ti-45Al-8Nb-0.2W-0.2B-0.02Y (at%) can be divided into three stages during 100 h at 900 °C. The change of ion diffusion path leads to the discontinuity of the oxidation curve between the second and third stage. Different stages of oxidation morphology have been investigated combined with TEM and STEM. AlNb2 phase forms at the interface of oxide scale/base alloy. Contrary to a continuous formation of 'x' phase in γ-TiAl with Nb free at the interface of oxide scale/base alloy. AlNb2 phase hinder continuous 'x' phase formation, which can promote TiAl oxidation protection.

    本文言語English
    ページ(範囲)978-988
    ページ数11
    ジャーナルCorrosion Science
    50
    4
    DOI
    出版ステータスPublished - 2008 4

    ASJC Scopus subject areas

    • 化学 (全般)
    • 化学工学(全般)
    • 材料科学(全般)

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