Amorphization kinetics of Zr{sub 3}Fe under electron irradiation
- Atomic Energy of Canada Ltd., Chalk River, ON (Canada)
- Argonne National Lab., IL (United States)
0.9 MeV electron irradiations were performed at 28--220 K in a high-voltage electron microscope (HVEM). By measuring onset, spread and final size of the amorphous region, factoring in the Guassian distribution of the beam, a kinetic description of the amorphization in terms of dose, dose rate and temperature was obtained. The critical temperature for amorphization by electron irradiation was found to be {approximately}220 K, compared to 570--625 K for {sup 40}Ar ion irradiation. Also, the dose-to-amorphization increased exponentially with temperature. Results indicated that the rate of growth of the amorphous region under the electron beam decreased with increasing temperature and the does-to-amorphization decreased with increasing dose rate. The size of the amorphous region saturated after a region dose, the final size decreasing with increasing temperature, and it was argued that this is related to the existence of a critical dose rate, which increased with temperature, below which no amorphization occurred. The above observations can be understood in the framework of the kinetics of damage accumulation under irradiation.
- Research Organization:
- Argonne National Lab., IL (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 10149706
- Report Number(s):
- ANL/MSD/CP-77644; CONF-920970-10; ON: DE94011520
- Resource Relation:
- Conference: 3. conference on evolution of microstructure in metals during irradiation,Chalk River (Canada),29 Sep - 2 Oct 1992; Other Information: PBD: Oct 1992
- Country of Publication:
- United States
- Language:
- English
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