In situ TEM observation of decomposition of high-purity sapphire

C. L. Chen, H. Furusho, H. Mori

    Research output: Contribution to journalArticle

    9 Citations (Scopus)

    Abstract

    The decomposition of -Al2O3 under 200 keV electron irradiation has been investigated by in situ high-resolution electron microscopy (HREM). It was confirmed that aluminium precipitated from -Al2O3 under 200 keV electron irradiation for less than 1 min over the temperature range from 700 to 1273 K. The electron dose rate was of the order of 1023 e m-2 s-1 and the vacuum level of the microscope was better than 10-6 Pa. The mechanisms of -Al2O3 decomposition were discussed based on two possible decomposition models: the thermally activated atom movement and the forced atom displacement.

    Original languageEnglish
    Pages (from-to)113-119
    Number of pages7
    JournalPhilosophical Magazine Letters
    Volume89
    Issue number2
    DOIs
    Publication statusPublished - 2009 Feb

    Keywords

    • Alumina
    • Electron irradiation
    • Electron microscopy
    • Phase transformations

    ASJC Scopus subject areas

    • Condensed Matter Physics

    Fingerprint Dive into the research topics of 'In situ TEM observation of decomposition of high-purity sapphire'. Together they form a unique fingerprint.

  • Cite this