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 proceedingConference contribution

5 Scopus citations

Abstract

Thin foils of Zircaloy-4 were irradiated with 350 KeV 4.0Ar 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)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 publicationMaterials Research Society Symposium Proceedings
PublisherPubl by Materials Research Society
Pages517-522
Number of pages6
Volume279
ISBN (Print)1558991743
StatePublished - 1993
EventBeam Solid Interactions: Fundamentals and Applications - Boston, MA, USA
Duration: Nov 30 1992Dec 4 1992

Other

OtherBeam Solid Interactions: Fundamentals and Applications
CityBoston, MA, USA
Period11/30/9212/4/92

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials

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    Motta, A. T., Howe, L. M., & Okamoto, P. R. (1993). Amorphization kinetics of Zr (Cr, Fe)2 under ion irradiation. In Materials Research Society Symposium Proceedings (Vol. 279, pp. 517-522). Publ by Materials Research Society.