Damage in the cation sublattice of α-Al2O3irradiated in an HVEM
- 1 March 1983
- journal article
- research article
- Published by Taylor & Francis in Philosophical Magazine A
- Vol. 47 (3) , 381-394
- https://doi.org/10.1080/01418618308245234
Abstract
α-Al2O3, has been irradiated at high temperatures with 300 keV electrons at which energy only aluminium ions are displaced. Systematic examination in a 100 kV electron microscope revealed pure edge dislocations of interstitial character with b=⅓[0001] and b=⅓[1010] lying on basal and prismatic {1010} planes respectively. The loops are stoichiometric but faulted on the aluminium sublattice. A model is proposed by which cation displacement at high temperatures results in aluminium interstitials precipitating between basal or {1010} prismatic planes with simultaneous diffusion of oxygen ions between the aluminium layers producing the faulted loops.Keywords
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