Amorphization kinetics of Zr(Cr,Fe){sub 2} under ion irradiation

Conference · Tue Dec 01 04:00:00 EST 1992

OSTI ID:10120331

Motta, A T ^[1]; Howe, L M ^[2]; Okamoto, P R ^[3]

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1. Pennsylvania State Univ., University Park, PA (United States). Dept. of Nuclear Engineering
2. Atomic Energy of Canada Ltd., Chalk River, ON (Canada). Chalk River Labs.
3. Argonne National Lab., IL (United States)

Thin foils of Zircaloy-4 were irradiated with 350 KeV {sup 40}Ar ions in the dual ion beam/HVEM facility at Argonne National Laboratory at 300--650 K. The irradiation-induced amorphization of the intermetallic precipitates Zr (Cr; Fe){sub 2} and Zr{sub 2} (Ni, Fe) was studied in-situ. For Zr (Cr, Fe){sub 2} precipitates the dose-to-amorphization was found to increase exponentially with temperature, with a critical temperature of about 650 K. The amorphization morphology was shown to be homogeneous, with no preferential site for nucleation, in contrast to neutron-irradiation amorphization which started at the precipitate-matrix interface. For Zr{sub 2} (Ni,Fe) precipitates it was found that amorphization occurred at 550 and 600 K, whereas in neutron irradiation no amorphization has been observed at those temperatures. The results are discussed in context of previous neutron and electron irradiations and likely amorphization mechanisms are proposed.

• Research Organization: Argonne National Lab., IL (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 10120331
• Report Number(s): ANL/MSD/CP--78354; CONF-921101--58; ON: DE93005560
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360106
AMORPHOUS STATE
ARGON 40
ARGON IONS
CHROMIUM ALLOYS
INTERMETALLIC COMPOUNDS
ION BEAMS
IRON ALLOYS
KEV RANGE 100-1000
PHYSICAL RADIATION EFFECTS
RADIATION DOSES
RADIATION EFFECTS
TEMPERATURE RANGE 0400-1000 K
ZIRCALOY 4
ZIRCONIUM ALLOYS