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Accumulation of radiation damage and disordering in MgAl2O4 under swift heavy ion irradiation

Dedicated to Prof. Dr.-Ing. Heinrich Wollenberger on the occasion of his 80th birthday
  • Kazuhiro Yasuda , Tomokazu Yamamoto , Motoki Etoh , Shinji Kawasoe , Syo Matsumura and Norito Ishikawa
Published/Copyright: May 18, 2013
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 102 Issue 9

Abstract

Accumulation and recovery of radiation-induced damage with swift heavy ions in stoichiometric magnesium aluminate spinel, MgAl2O4, has been investigated. Microstructural change and atomic disordering was examined through transmission electron microscopy (TEM) techniques, with bright-field (BF) and high-resolution (HR) TEM images, and high angular resolution electron channelling X-ray spectroscopy (HARECXS), for single crystal MgAl2O4 irradiated with 200 MeV Xe, and 340 or 350 MeV Au ions. The density of core damage region, detected by BFTEM with Fresnel-contrast, increased proportionally with ion fluence at the early stage of accumulation and saturated at a fluence higher than 1016 ions m2. This result is discussed with a balance between the formation and recovery of the core damage region under irradiation, and the influence region to induce the recovery was evaluated to be 7 – 9 nm in radius. HARECXS and electron diffraction analysis revealed that cations at tetrahedral sites preferentially occupy octahedral sites to transform to defective rock-salt structure. The structure of the core damage region is found from HR and BFTEM images to be a columnar vacancy-rich region with a low atomic density.

Keywords: Magnesium aluminate spinel; Advanced nuclear fuel; Swift heavy ion; Ion track; Cation disordering
∗ Correspondence address, Kazuhiro Yasuda, Associate Professor, Department of Applied Quantum Physics and Nuclear, Engineering, Kyushu University, Motooka 744, Nishi-ku, Fukuoka 819-0395, Japan, Tel.: +8192642 3487, Fax: +8192802 3489, E-mail:

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Received: 2011-3-31
Accepted: 2011-7-6
Published Online: 2013-05-18
Published in Print: 2011-09-01

© 2011, Carl Hanser Verlag, München

Articles in the same Issue

  1. Contents
  2. Contents
  3. Editorial
  4. Prof. Dr.-Ing. Heinrich Wollenberger — 80 years
  5. Original Contributions
  6. Atom probe tomography: from physical metallurgy towards microelectronics
  7. Accumulation of radiation damage and disordering in MgAl2O4 under swift heavy ion irradiation
  8. TEM study of irradiation induced copper precipitation in boron alloyed EUROFER97 steel
  9. Order – disorder transformation in Ni – V alloys under electron irradiation
  10. Materials issues of the SINQ high-power spallation target
  11. The origin and development of the P{011}<111> orientation during recrystallization of particle-containing alloys
  12. Coarsening kinetics of Cu-rich precipitates in a concentrated multicomponent Fe–Cu based steel
  13. Beyond Ni-based superalloys: Development of CoRe-based alloys for gas turbine applications at very high temperatures
  14. The effect of heat treatments on the microstructure, texture and mechanical properties of the extruded magnesium alloy ME21
  15. Analysing SANS data to determine magnetisation reversal processes in composite perpendicular magnetic recording media using TEM images
  16. Dislocationless sliding in a polycluster glass
  17. Evolution of transformation plasticity during bainitic transformation
  18. Surface tension and viscosity of NiAl catalytic precursor alloys from microgravity experiments
  19. Synthesis of carbon nanotubes by fine Ni particles in Ni3Al foam
  20. Fabrication of dielectric thin films by sputtering deposition at different pressures with (Ba0.3Sr0.7)(Zn1/3Nb2/3)O3 ceramic as target
  21. DGM News
  22. DGM News
https://doi.org/10.3139/146.110564
Keywords for this article
Magnesium aluminate spinel; Advanced nuclear fuel; Swift heavy ion; Ion track; Cation disordering

Articles in the same Issue

  1. Contents
  2. Contents
  3. Editorial
  4. Prof. Dr.-Ing. Heinrich Wollenberger — 80 years
  5. Original Contributions
  6. Atom probe tomography: from physical metallurgy towards microelectronics
  7. Accumulation of radiation damage and disordering in MgAl2O4 under swift heavy ion irradiation
  8. TEM study of irradiation induced copper precipitation in boron alloyed EUROFER97 steel
  9. Order – disorder transformation in Ni – V alloys under electron irradiation
  10. Materials issues of the SINQ high-power spallation target
  11. The origin and development of the P{011}<111> orientation during recrystallization of particle-containing alloys
  12. Coarsening kinetics of Cu-rich precipitates in a concentrated multicomponent Fe–Cu based steel
  13. Beyond Ni-based superalloys: Development of CoRe-based alloys for gas turbine applications at very high temperatures
  14. The effect of heat treatments on the microstructure, texture and mechanical properties of the extruded magnesium alloy ME21
  15. Analysing SANS data to determine magnetisation reversal processes in composite perpendicular magnetic recording media using TEM images
  16. Dislocationless sliding in a polycluster glass
  17. Evolution of transformation plasticity during bainitic transformation
  18. Surface tension and viscosity of NiAl catalytic precursor alloys from microgravity experiments
  19. Synthesis of carbon nanotubes by fine Ni particles in Ni3Al foam
  20. Fabrication of dielectric thin films by sputtering deposition at different pressures with (Ba0.3Sr0.7)(Zn1/3Nb2/3)O3 ceramic as target
  21. DGM News
  22. DGM News
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