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Effect of Irradiation Spectrum on the Microstructure of Ion-Irradiated A120O3

Published online by Cambridge University Press:  16 February 2011

S. J. Zinkle
S. J. Zinkle*
Affiliation:
Metals and Ceramics Division, Oak Ridge National Laboratory, P.O. Box 2008, Oak Ridge, TN 37831-6376, USA
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Abstract

Polycrystalline samples of alpha-alumina have been irradiated with various ions ranging from 3.6 MeV Fe+ to 1 MeV H+ ions at 650°C. Cross-section transmission electron microscopy was used to investigate the depth-dependent microstructure of the irradiated specimens. The microstructure following irradiation was observed to be dependent on the irradiation spectrum. In particular, defect cluster nucleation was effectively suppressed in specimens irradiated with light ions such as I MeV H+ ions. On the other hand, light ion irradiation tended to accelerate the growth rate of dislocation loops. The microstructural observations are discussed in terms of ionization enhanced diffusion processes.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 373: Symposium Y – Microstructure of Irradiated Materials , 1994 , 287
Copyright
Copyright © Materials Research Society 1995

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