SHI induced tetragonal tracks in natural zirconia

We describe the observed tetragonal nature of individual ion tracks produced in natural monoclinic zirconia (ZrO2) as a result of 167 MeV Xe irradiation at room temperature in the non-overlapping track regime. Direct observation by transmission electron microscopy of the tetragonal latent tracks rev...

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Bibliographic Details
Published in:Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms Beam interactions with materials and atoms, 2020-06, Vol.473, p.1-5
Main Authors: O'Connell, J.H., Lee, M.E., Skuratov, V.A., Rymzhanov, R.A.
Format: Article
Language:English
Subjects:
Annealing
SHI
TEM
Transformation
Zirconia
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Summary:We describe the observed tetragonal nature of individual ion tracks produced in natural monoclinic zirconia (ZrO2) as a result of 167 MeV Xe irradiation at room temperature in the non-overlapping track regime. Direct observation by transmission electron microscopy of the tetragonal latent tracks reveals a non-continuous structure consisting of segments which are approximately 30 nm in length and angled 9° w.r.t the ion direction. This angle is consistent with the angular difference for the unit cells of the two phases. The tracks are shown to have rectangular cross sections with dimensions of the order 2.5 nm. The tetragonal component orientation relative to the parent monoclinic orientation is in agreement with the proposed variants by Kelly et al. The tetragonal phase transforms back to the monoclinic phase in the range of 200–350 °C which is well below the bulk transformation temperature of about 1100 °C.
ISSN:0168-583X
1872-9584
DOI:10.1016/j.nimb.2020.04.002