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Title: Ion beam analysis of MgAl{sub 2}O{sub 4} spinel irradiated with fast neutrons to 50-250 dpa

Abstract

Non-destructive ion beam analysis techniques have been employed to examine the radiation damage in MgAl{sub 2}O{sub 4} spinel single crystals irradiated with fast neutrons at 400 and 750{degrees}C to high fluences ({>=}5 x 10{sup 22} n/cm{sup 2}, E{sub n} > 0.1 MeV). Rutherford backscattering and ion channeling measurements using 1-4 MeV He ion beams revealed that the radiation damage saturated after irradiation at 400{degrees}C to 50 displacements per atom. The energy dependence of dechanneling indicated the dominant extended defects present in the highly irradiated spinel are in the form of dislocations. Channeling angular scans of particle induced x-ray emission further suggested that neutron irradiation tends to randomize cation distribution for Mg{sup 2+} and Al{sup 3+} cations on the lattice sites. These results are compared to the microstructure observations of Kinoshita, et al. and the neutron scattering results of Sickafus, et al.

Authors:
; ;  [1]
  1. and others
Publication Date:
Research Org.:
Los Alamos National Lab., NM (United States)
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
192463
Report Number(s):
LA-UR-95-4362; CONF-951202-1
ON: DE96005611; TRN: 96:001656
DOE Contract Number:  
W-7405-ENG-36
Resource Type:
Conference
Resource Relation:
Conference: Fall annual meeting of the Japan Institute of Metals: advanced materials and technology for the 21st century, Honolulu, HI (United States), 13-15 Dec 1995; Other Information: PBD: 1995
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; MAGNESIUM OXIDES; PHYSICAL RADIATION EFFECTS; ALUMINIUM OXIDES; MICROSTRUCTURE; BACKSCATTERING; CRYSTAL LATTICES; DISLOCATIONS; FAST NEUTRONS; ION BEAMS; ION CHANNELING

Citation Formats

Yu, Ning, Maggiore, C J, and Sickafus, K E. Ion beam analysis of MgAl{sub 2}O{sub 4} spinel irradiated with fast neutrons to 50-250 dpa. United States: N. p., 1995. Web.
Yu, Ning, Maggiore, C J, & Sickafus, K E. Ion beam analysis of MgAl{sub 2}O{sub 4} spinel irradiated with fast neutrons to 50-250 dpa. United States.
Yu, Ning, Maggiore, C J, and Sickafus, K E. Sun . "Ion beam analysis of MgAl{sub 2}O{sub 4} spinel irradiated with fast neutrons to 50-250 dpa". United States. https://www.osti.gov/servlets/purl/192463.
@article{osti_192463,
title = {Ion beam analysis of MgAl{sub 2}O{sub 4} spinel irradiated with fast neutrons to 50-250 dpa},
author = {Yu, Ning and Maggiore, C J and Sickafus, K E},
abstractNote = {Non-destructive ion beam analysis techniques have been employed to examine the radiation damage in MgAl{sub 2}O{sub 4} spinel single crystals irradiated with fast neutrons at 400 and 750{degrees}C to high fluences ({>=}5 x 10{sup 22} n/cm{sup 2}, E{sub n} > 0.1 MeV). Rutherford backscattering and ion channeling measurements using 1-4 MeV He ion beams revealed that the radiation damage saturated after irradiation at 400{degrees}C to 50 displacements per atom. The energy dependence of dechanneling indicated the dominant extended defects present in the highly irradiated spinel are in the form of dislocations. Channeling angular scans of particle induced x-ray emission further suggested that neutron irradiation tends to randomize cation distribution for Mg{sup 2+} and Al{sup 3+} cations on the lattice sites. These results are compared to the microstructure observations of Kinoshita, et al. and the neutron scattering results of Sickafus, et al.},
doi = {},
url = {https://www.osti.gov/biblio/192463}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1995},
month = {12}
}

Conference:
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