TY - JOUR
T1 - Amorphization of Zr3Fe under electron irradiation
AU - Motta, A. T.
AU - Howe, L. M.
AU - Okamoto, P. R.
N1 - Funding Information:
The authors would like to thank D. Phillips of Chalk River Laboratories for his technical assistance, as well as E. Ryan and S. Ockers of Argonne National Laboratories, for their technical assistance during the experiments. This research program was partly funded through a CANDU Owners Group (COG) contract in working party 32 and by the National Science Foundation under grant INT-9503934.
PY - 1999/4/1
Y1 - 1999/4/1
N2 - The intermetallic compound Zr3Fe has been made amorphous by 0.9 MeV electron irradiation. By performing this irradiation in situ, it was possible to conduct a systematic study of the influence of temperature, dose rate, electron energy and specimen orientation on the amorphization process. The critical temperature and the critical dose for amorphization were determined, and shown to depend on dose rate. By varying electron energy, we determined the displacement energies for the Zr and Fe atoms in Zr3Fe, and showed that, at low electron energy, the amorphization rate is dependent on specimen orientation. We analyze these results in terms of a model based on amorphization occurring at a damage level where the modified free energy of the irradiated crystal exceeds the free energy of the amorphous phase. This model is shown to predict the amorphization kinetics, i.e. the critical temperature and critical dose for amorphization. We also compare amorphization induced by electron and ion irradiation.
AB - The intermetallic compound Zr3Fe has been made amorphous by 0.9 MeV electron irradiation. By performing this irradiation in situ, it was possible to conduct a systematic study of the influence of temperature, dose rate, electron energy and specimen orientation on the amorphization process. The critical temperature and the critical dose for amorphization were determined, and shown to depend on dose rate. By varying electron energy, we determined the displacement energies for the Zr and Fe atoms in Zr3Fe, and showed that, at low electron energy, the amorphization rate is dependent on specimen orientation. We analyze these results in terms of a model based on amorphization occurring at a damage level where the modified free energy of the irradiated crystal exceeds the free energy of the amorphous phase. This model is shown to predict the amorphization kinetics, i.e. the critical temperature and critical dose for amorphization. We also compare amorphization induced by electron and ion irradiation.
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U2 - 10.1016/S0022-3115(98)00657-6
DO - 10.1016/S0022-3115(98)00657-6
M3 - Article
AN - SCOPUS:0032625731
VL - 270
SP - 174
EP - 186
JO - Journal of Nuclear Materials
JF - Journal of Nuclear Materials
SN - 0022-3115
IS - 1
ER -