Effect on electron energy on amorphization of ZrCr{sub 2}
- Department of Nuclear Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802 (United States)
- AECL Chalk River Laboratories, Chalk River, Ontario K0J 1J0 (Canada)
- Materials Science Division, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439 (United States)
The influence of electron energy on the amorphization of ZrCr{sub 2} at 25 K was measured. Amorphization was observed at electron energies from 900 to 330 keV. The dose-to-amorphization increases with decreasing electron energy with two steps, one at 700 keV corresponding to the decrease in the Zr displacement cross section due to the approaching displacement threshold of Zr and one at 500 keV corresponding to an appreciable decrease in the displacement cross section of Cr due to the approaching displacement threshold for Cr. At lower electron energies, it is believed that amorphization occurs principally through a secondary displacement mechanism, where light impurity atoms (mainly O) are displaced by electrons and displace in turn the heavier atoms. By fitting the results using electron displacement cross sections, we find the displacement energies in each sublattice to be {ital E}{sub {ital d}}{sup Zr}=22 eV, {ital E}{sub {ital d}}{sup Cr}=23 eV, {ital E}{sub {ital d}}{sup O}=4 eV. {copyright} {ital 1996 American Institute of Physics.}
- OSTI ID:
- 285541
- Journal Information:
- Journal of Applied Physics, Vol. 80, Issue 2; Other Information: PBD: Jul 1996
- Country of Publication:
- United States
- Language:
- English
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