In situ TEM observation of decomposition of high-purity sapphire

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

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)


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
Issue number2
Publication statusPublished - 2009 Feb
Externally publishedYes


  • Alumina
  • Electron irradiation
  • Electron microscopy
  • Phase transformations

ASJC Scopus subject areas

  • Condensed Matter Physics


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