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Ion Irradiation Damage In MgAl2O4 and Al23O27N5 Ceramics

Published online by Cambridge University Press:  21 February 2011

P. A. Knight ,
M. L. Jenkins  and
G. P. Pells
P. A. Knight
Affiliation:
Department of Metallurgy and Science of Materials, University of Oxford, OXi 3PH, England
M. L. Jenkins
Affiliation:
Department of Metallurgy and Science of Materials, University of Oxford, OXi 3PH, England
G. P. Pells
Affiliation:
Materials Development Division, Harwell Laboratory, Oxon OXll ORA, England
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Abstract

Polycrystalline magnesium aluminate spinel (MgAl2O4) and Al23O27 N5 (ALON) were irradiated with 4 MeV Ar+ ions to doses from 0.5 to 6 displacements per atom (dpa) at a temperature of 1070K and subsequently examined using transmission electron microscopy. Faulted dislocation loops were found in both materials, although their habit planes ({110} and {111} respectively) and Burgers vectors (a/4 <110> and a/6 <111>) differ. Cavities were found in spinel but not in ALON. Both materials exhibited a similar, low, degree of radiation damage and we conclude that polycrystalline ALON is a good potential reactor window material.

Information

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 152: Symposium H – Optical Materials: Processing and Science , 1989 , 135
Copyright
Copyright © Materials Research Society 1989

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References

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