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Irradiated Microstructures of Magnesium Aluminate Spinel and their Controlling Factors

Published online by Cambridge University Press:  15 February 2011

C. Kinoshita ,
S. Matsumura ,
K. Yasuda ,
T. Soeda  and
M. Noujima
C. Kinoshita
Affiliation:
Department of Applied Quantum Physics and Nuclear Engineering, Kyushu University, Hakozaki, Higashi-ku, Fukuoka 812-8581, c.k.tne@mbox.nc.kyushu-u.ac.jp
S. Matsumura
Affiliation:
Department of Applied Quantum Physics and Nuclear Engineering, Kyushu University, Hakozaki, Higashi-ku, Fukuoka 812-8581
K. Yasuda
Affiliation:
Department of Applied Quantum Physics and Nuclear Engineering, Kyushu University, Hakozaki, Higashi-ku, Fukuoka 812-8581
T. Soeda
Affiliation:
Department of Applied Quantum Physics and Nuclear Engineering, Kyushu University, Hakozaki, Higashi-ku, Fukuoka 812-8581
M. Noujima
Affiliation:
Department of Applied Quantum Physics and Nuclear Engineering, Kyushu University, Hakozaki, Higashi-ku, Fukuoka 812-8581
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Abstract

This paper reviews our recent progress in study on the strong resistance of magnesium aluminate spinel to void swelling during irradiation, along with the related characteristic features of its radiation damage. Comparative experimental results on irradiated microstructures and mechanical properties in magnesium aluminate spinel and alpha-alumina are shown in terms of controlling factors of radiation resistance of the former crystal. It is experimentally shown that structural vacancies due to non-stoichiometry provide effective recombination sites for displaced cations to suppress the formation of interstitial loops. Decreased formation of interstitial loops enhances the further recombination of interstitials and vacancies and thereby the formation of voids.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 540: Symposium N / Microstructural Processes in Irradiated Materials , 1998 , 287
Copyright
Copyright © Materials Research Society 1999

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