MICROSTRUCTURE EVOLUTION OF DEFECT CLUSTERS IN NEUTRON-IRRADIATED MGO-CENTER-DOT-NAL2O3

Authors
FUKUMOTO K KINOSHITA C MAEDA S WATANUKI Y NAKAI K
Citation
K. Fukumoto et al., MICROSTRUCTURE EVOLUTION OF DEFECT CLUSTERS IN NEUTRON-IRRADIATED MGO-CENTER-DOT-NAL2O3, Science Reports of the Research Institutes, Tohoku University, Series A: Physics, Chemistry, and Metallurgy, 40(1), 1994, pp. 111-119
Citations number
15
Categorie Soggetti
Material Science","Metallurgy & Mining
Journal title
Science Reports of the Research Institutes, Tohoku University, Series A: Physics, Chemistry, and Metallurgy → ACNP
ISSN journal
00408808
Volume
40
Issue
1
Year of publication
1994
Pages
111 - 119
Database
ISI
SICI code
0040-8808(1994)40:1<111:MEODCI>2.0.ZU;2-K
Abstract
The formation process of defect clusters in MgO.nAl(2)O(3) has been st udied not only for understanding the mechanism of the nucleation and g rowth process of defect clusters but also for getting insights into th e reason why this material shows radiation resistance. Defect analysis was performed to determine the following sequential change of disloca tion loops under irradiation with fission neutrons in Joyo and JMTR; 1 /6[111](111) --> 1/4[110](111) --> 1/4[110](101) --> 1/4[110](110) --> 1/2[110](110). Effective recombinations of interstitials with structu ral vacancies due to non-stoichiometry, instability of loops formed di rectly by damage cascades, large nuclei of stable interstitial loops a nd the failure of loops to unfault are critical factors for high radia tion-resistance of this material.