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Effect of Iodine and Strontium Ion Implantation on the Microstructure of Cubic Zirconia

Published online by Cambridge University Press:  17 March 2011

Sha Zhu ,
Lumin Wang ,
Shixin Wang  and
Rodney C. Ewing
Sha Zhu
Affiliation:
Department of Nuclear Engineering and Radiological SciencesUniversity of Michigan, Ann Arbor, MI 48109-2104, USA
Lumin Wang
Affiliation:
Department of Nuclear Engineering and Radiological SciencesUniversity of Michigan, Ann Arbor, MI 48109-2104, USA
Shixin Wang
Affiliation:
Department of Nuclear Engineering and Radiological SciencesUniversity of Michigan, Ann Arbor, MI 48109-2104, USA
Rodney C. Ewing
Affiliation:
Department of Nuclear Engineering and Radiological SciencesUniversity of Michigan, Ann Arbor, MI 48109-2104, USA
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Abstract

200 keV iodine and 400 keV strontium ions have been implanted into YSZ in order to study the effects of fission product incorporation in YSZ as an inert fuel matrix. The ion implantation was conducted at room temperature. The ion fluences reached 1×1021 ions/m2 which gives peak displacement damage levels of ~ 290 dpa for I ion implantation and ~ 200 dpa for Sr ion implantation. The peak concentration reaches ~26 at. % for implanted I ions and ~11.6 at.% for Sr ions. Cross-sectional transmission electron microscopy (TEM) was completed to investigate the microstructure changes caused by the implantation. No evidence of amorphization was detected in both samples although a high density of defect clusters was observed by TEM. Cross-sectional TEM revealed formation of iodine containing voids in I- implanted samples and crystalline precipitates of a few tens of nanometers in Sr-implanted samples after annealing of the implanted sample at 1000°C for 0.5 to 2 hours. The void size increased with increasing annealing time. The nano-crystalline precipitates in Sr-implanted YSZ are isometric SrZrO3 (a≅0.41 nm). The orientation relation between the matrix and precipitates, as determined by selected area diffraction pattern, was: [011]YSZ// [111]SrZrO3 and [200]YSZ// [110]SrZrO3.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 647: Symposium O – Ion Beam Synthesis & Processing of Advanced Materials , 2000 , O11.19
Copyright
Copyright © Materials Research Society 2001

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