Bubble Formation in Zr Alloys Under Heavy Ion Implantation

Abstract

We report here the results of a study conducted to examine the effect of Kr ion irradiation on bubble formation in Zr alloys. We used the HVEM/Tandem facility at Argonne National Laboratory to irradiate several Zr alloys, including Zircaloy-2 and Zircaloy-4, at temperatures from 300 to 800 C and to doses up to 2 × 1016ion.cm−2. Both in-situ irradiation of thin foils as well as irradiation of bulk samples with an ion implanter were used in this study. For the thin foil irradiations, a distribution of small bubbles in the range of 30-100 Å was found, at all temperatures with the exception of the Cr-rich Valloy where bubbles of 130 Å were found. The irradiation of bulk samples at high temperature (700–800 C) produced large faceted bubbles (up to 300 Å) after irradiation to 2 × 1016ion.cm−2. The results are examined in the context of existing models for bubble formation and growth in other metals.

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Correspondence to Luciano Pagano Jr..

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Pagano, L., Motta, A.T. & Birtcher, R.C. Bubble Formation in Zr Alloys Under Heavy Ion Implantation. MRS Online Proceedings Library 398, 201–206 (1995). https://doi.org/10.1557/PROC-398-201

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