Paper Title:
Microstructural Evolution in Cerium Dioxide Irradiated with Heavy Ions at High Temperature
  Abstract

Cerium dioxide (CeO2) is a well-studied oxide because of its technological applications, such as a major component in the catalysts, stable capacitors and so on. CeO2 with a cubic fluorite structure is also expected as the material for simulating behaviors of uranium dioxide under energetic particle irradiation, which leads high burn-up structure attributable to pressure increase in fuel cladding tubes. In this work, the stability of crystal structure and surface morphology change in CeO2 will be clarified. Polycrystalline samples were irradiated with 300 keV Xe+, 18 MeV I5+, 350 keV O+ and 12 MeV O3+ ions at temperatures from 370 to 1000 K. Microstructural evolutions was investigated with Scanning electron microscopy, Raman Spectroscopy and X-ray diffractometry. Irradiation effects at high temperature were observed as surface etching and resulting bubble formation, however blistering was not detected. Raman spectra and diffraction data indicates diffusion of oxygen vacancies is sufficient at 900 K and above.

  Info
Periodical
Advanced Materials Research (Volumes 26-28)
Edited by
Young Won Chang, Nack J. Kim and Chong Soo Lee
Pages
929-932
DOI
10.4028/www.scientific.net/AMR.26-28.929
Citation
T. Mihara, H. Abe, T. Iwai, T. Sonoda, E. Wakai, "Microstructural Evolution in Cerium Dioxide Irradiated with Heavy Ions at High Temperature", Advanced Materials Research, Vols. 26-28, pp. 929-932, 2007
Online since
October 2007
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$32.00
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