(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

    Research output: Contribution to journalArticlepeer-review

    31 Citations (Scopus)

    Abstract

    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.

    Original languageEnglish
    Pages (from-to)978-988
    Number of pages11
    JournalCorrosion Science
    Volume50
    Issue number4
    DOIs
    Publication statusPublished - 2008 Apr 1

    Keywords

    • A. Alloy
    • B. STEM
    • C. Oxidation

    ASJC Scopus subject areas

    • Chemistry(all)
    • Chemical Engineering(all)
    • Materials Science(all)

    Fingerprint Dive into the research topics of '(S)TEM study of different stages of Ti-45Al-8Nb-0.2W-0.2B-0.02Y alloy oxidation at 900 °C'. Together they form a unique fingerprint.

    Cite this