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

Arthur Thompson Motta, L. M. Howe, P. R. Okamoto

Research output: Chapter in Book/Report/Conference proceedingOther chapter contribution

Abstract

Thin foils of Zircaloy-4 were irradiated with 350 keV 40Ar ions in the dual ion beam/HVEM facility at Argonne National Library at 300-650 K. The irradiation-induced amorphization of the intermetallic precipitates Zr(Cr, Fe)2 and Zr2(Ni, Fe) was studied in-situ. For Zr(Cr, Fe)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 Zr2(Ni, Fe) precipitates it was found that amorphization occurred at 550 K and 600 K, whereas in neutron irradiation no amorphization has been observed at those temperatures. The results are discussed in the context of the previous experimental results of neutron and electron irradiation, and likely amorphization mechanisms are proposed.

Original languageEnglish (US)
Title of host publicationAtomic Energy of Canada Limited, AECL (Report)
PublisherAECL
Pages1-9
Number of pages9
Edition10797
StatePublished - Oct 1994

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Amorphization
Ion bombardment
Kinetics
Precipitates
Neutron irradiation
Electron irradiation
Temperature
Metal foil
Ion beams
Intermetallics
Nucleation
Irradiation
Ions

All Science Journal Classification (ASJC) codes

  • Energy Engineering and Power Technology
  • Industrial and Manufacturing Engineering

Cite this

Motta, A. T., Howe, L. M., & Okamoto, P. R. (1994). Amorphization kinetics of Zr(Cr, Fe)2 under ion irradiation. In Atomic Energy of Canada Limited, AECL (Report) (10797 ed., pp. 1-9). AECL.
Motta, Arthur Thompson ; Howe, L. M. ; Okamoto, P. R. / Amorphization kinetics of Zr(Cr, Fe)2 under ion irradiation. Atomic Energy of Canada Limited, AECL (Report). 10797. ed. AECL, 1994. pp. 1-9
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Motta, AT, Howe, LM & Okamoto, PR 1994, Amorphization kinetics of Zr(Cr, Fe)2 under ion irradiation. in Atomic Energy of Canada Limited, AECL (Report). 10797 edn, AECL, pp. 1-9.

Amorphization kinetics of Zr(Cr, Fe)2 under ion irradiation. / Motta, Arthur Thompson; Howe, L. M.; Okamoto, P. R.

Atomic Energy of Canada Limited, AECL (Report). 10797. ed. AECL, 1994. p. 1-9.

Research output: Chapter in Book/Report/Conference proceedingOther chapter contribution

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T1 - Amorphization kinetics of Zr(Cr, Fe)2 under ion irradiation

AU - Motta, Arthur Thompson

AU - Howe, L. M.

AU - Okamoto, P. R.

PY - 1994/10

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N2 - Thin foils of Zircaloy-4 were irradiated with 350 keV 40Ar ions in the dual ion beam/HVEM facility at Argonne National Library at 300-650 K. The irradiation-induced amorphization of the intermetallic precipitates Zr(Cr, Fe)2 and Zr2(Ni, Fe) was studied in-situ. For Zr(Cr, Fe)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 Zr2(Ni, Fe) precipitates it was found that amorphization occurred at 550 K and 600 K, whereas in neutron irradiation no amorphization has been observed at those temperatures. The results are discussed in the context of the previous experimental results of neutron and electron irradiation, and likely amorphization mechanisms are proposed.

AB - Thin foils of Zircaloy-4 were irradiated with 350 keV 40Ar ions in the dual ion beam/HVEM facility at Argonne National Library at 300-650 K. The irradiation-induced amorphization of the intermetallic precipitates Zr(Cr, Fe)2 and Zr2(Ni, Fe) was studied in-situ. For Zr(Cr, Fe)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 Zr2(Ni, Fe) precipitates it was found that amorphization occurred at 550 K and 600 K, whereas in neutron irradiation no amorphization has been observed at those temperatures. The results are discussed in the context of the previous experimental results of neutron and electron irradiation, and likely amorphization mechanisms are proposed.

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Motta AT, Howe LM, Okamoto PR. Amorphization kinetics of Zr(Cr, Fe)2 under ion irradiation. In Atomic Energy of Canada Limited, AECL (Report). 10797 ed. AECL. 1994. p. 1-9