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

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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 ... continued below

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23 p.

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Yu, Ning; Maggiore, C. J. & Sickafus, K. E. December 1995.

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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.

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23 p.

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OSTI as DE96005611

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  • 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

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  • Other: DE96005611
  • Report No.: LA-UR--95-4362
  • Report No.: CONF-951202--1
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 192463
  • Archival Resource Key: ark:/67531/metadc664948

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  • December 1995

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  • June 29, 2015, 9:42 p.m.

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  • March 2, 2016, 1:16 p.m.

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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, article, December 1995; New Mexico. (digital.library.unt.edu/ark:/67531/metadc664948/: accessed October 21, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.