Structural disordering in magnesium aluminate spinel compounds under ion-beam irradiation

Syo Matsumura, Mikio Shimada, Kazuhiro Yasuda, Chiken Kinoshita

Research output: Contribution to journalConference articlepeer-review

3 Citations (Scopus)


High Angular Resolution Electron Channeling X-ray Spectroscopy (HARECXS) of analytical electron microscopy was employed in quantitative analysis of irradiation-induced structural disordering in MgO·nAl2O 3 spinel compounds irradiated with 1 MeV Ne+ ions and 200 MeV Xe14+ ions. The results successfully show the disordering behavior in MgO·nAl2O3 as a function of composition and irradiation condition. It has been revealed by HARECXS that 1 MeV Ne + irradiation at 873 K causes significant cation-disordering in the pre-peak damaged area where no indication is recognized in conventional TEM observation. Displacement of O2- ions is also recognized in heavily damaged areas. Irradiation with 200 MeV Xe14+ swift ions, on the other hand, forms structurally-disordered cylinders of 4 nm in diameter along their tracks. HARECXS profiles indicate that the disordering takes place over extended areas of about 10 nm in radius centered on the ion tracks.

Original languageEnglish
Pages (from-to)131-142
Number of pages12
JournalMaterials Research Society Symposium - Proceedings
Publication statusPublished - 2003
EventRadiation Effects and Ion-Beam Processing of Materials - Boston, MA., United States
Duration: Dec 1 2003Dec 5 2003

All Science Journal Classification (ASJC) codes

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


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