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Title: Swift-heavy ion irradiation response and annealing behavior of A 2TiO 5 (A = Nd, Gd, and Yb)

Abstract

The structural responses of A 2BO 5 (A = Nd, Gd, and Yb; B = Ti) compositions irradiated by high-energy Au ions (2.2 GeV) were investigated using transmission electron microscopy, synchrotron X-ray diffraction and Raman spectroscopy. The extent of irradiation-induced amorphization depends on the size of the A-site cation, with smaller lanthanides having less susceptibility to the accumulation of radiation damage. In the track-overlapping regime, complete amorphization is observed in all three compounds, despite the ability of Yb 2TiO 5 to incorporate a great deal of structural disorder into its initial defect-fluorite structure (Fm-3m). This is attributed to the high cation radius ratio (A:B = 2:1), which reduces the stability of the structure upon ion irradiation. The fully-amorphized samples were subsequently isochronally heated at temperature intervals from 100 °C to 850 °C. X-ray diffraction analysis indicated a similar damage recovery process in Nd 2TiO 5 and Gd 2TiO 5, where both compositions recover their original structures (Pnma) at 850 °C. In contrast, Yb2TiO5 exhibited recrystallization of a metastable, non-equilibrium orthorhombic phase at ~ 550 °C, prior to a transformation to the stable defect-fluorite phase (Fm-3m) at 625 °C. In conclusion, these compositional variations in radiation tolerance and thermal recovery processesmore » are described in terms of the energetics of disordering during the damage and recrystallization processes.« less

Authors:
 [1];  [1];  [2];  [3];  [4];  [5];  [3];  [6];  [1]
  1. Stanford Univ., CA (United States). Dept. of Geological Sciences
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science & Technology Division
  3. Univ. of Tennessee, Knoxville, TN (United States). Dept. of Nuclear Engineering
  4. Carnegie Inst. of Washington, Argonne, IL (United States). Geophysical Lab., High Pressure Collaborative Access Team (HPCAT)
  5. GSI-Helmholtzzentrum fur Schwerionenforschung, Darmstadt (Germany); Technische Univ. Darmstadt (Germany)
  6. Stanford Univ., CA (United States). Dept. of Geological Sciences; SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Institute for Materials and Energy Science (SIMES)
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1426170
Grant/Contract Number:  
AC02-76SF00515; SC0001089; AC02-06CH1135; NA0001974; FG02-99ER45775; FC03-03NA00144
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Journal of Solid State Chemistry
Additional Journal Information:
Journal Volume: 258; Journal Issue: C; Journal ID: ISSN 0022-4596
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; Ion irradiation; High temperature; Radiation response; Ion tracks

Citation Formats

Park, Sulgiye, Tracy, Cameron L., Zhang, Fuxiang, Palomares, Raul I., Park, Changyong, Trautmann, Christina, Lang, Maik, Mao, Wendy L., and Ewing, Rodney C.. Swift-heavy ion irradiation response and annealing behavior of A2TiO5 (A = Nd, Gd, and Yb). United States: N. p., 2017. Web. doi:10.1016/j.jssc.2017.09.028.
Park, Sulgiye, Tracy, Cameron L., Zhang, Fuxiang, Palomares, Raul I., Park, Changyong, Trautmann, Christina, Lang, Maik, Mao, Wendy L., & Ewing, Rodney C.. Swift-heavy ion irradiation response and annealing behavior of A2TiO5 (A = Nd, Gd, and Yb). United States. doi:10.1016/j.jssc.2017.09.028.
Park, Sulgiye, Tracy, Cameron L., Zhang, Fuxiang, Palomares, Raul I., Park, Changyong, Trautmann, Christina, Lang, Maik, Mao, Wendy L., and Ewing, Rodney C.. Thu . "Swift-heavy ion irradiation response and annealing behavior of A2TiO5 (A = Nd, Gd, and Yb)". United States. doi:10.1016/j.jssc.2017.09.028. https://www.osti.gov/servlets/purl/1426170.
@article{osti_1426170,
title = {Swift-heavy ion irradiation response and annealing behavior of A2TiO5 (A = Nd, Gd, and Yb)},
author = {Park, Sulgiye and Tracy, Cameron L. and Zhang, Fuxiang and Palomares, Raul I. and Park, Changyong and Trautmann, Christina and Lang, Maik and Mao, Wendy L. and Ewing, Rodney C.},
abstractNote = {The structural responses of A2BO5 (A = Nd, Gd, and Yb; B = Ti) compositions irradiated by high-energy Au ions (2.2 GeV) were investigated using transmission electron microscopy, synchrotron X-ray diffraction and Raman spectroscopy. The extent of irradiation-induced amorphization depends on the size of the A-site cation, with smaller lanthanides having less susceptibility to the accumulation of radiation damage. In the track-overlapping regime, complete amorphization is observed in all three compounds, despite the ability of Yb2TiO5 to incorporate a great deal of structural disorder into its initial defect-fluorite structure (Fm-3m). This is attributed to the high cation radius ratio (A:B = 2:1), which reduces the stability of the structure upon ion irradiation. The fully-amorphized samples were subsequently isochronally heated at temperature intervals from 100 °C to 850 °C. X-ray diffraction analysis indicated a similar damage recovery process in Nd2TiO5 and Gd2TiO5, where both compositions recover their original structures (Pnma) at 850 °C. In contrast, Yb2TiO5 exhibited recrystallization of a metastable, non-equilibrium orthorhombic phase at ~ 550 °C, prior to a transformation to the stable defect-fluorite phase (Fm-3m) at 625 °C. In conclusion, these compositional variations in radiation tolerance and thermal recovery processes are described in terms of the energetics of disordering during the damage and recrystallization processes.},
doi = {10.1016/j.jssc.2017.09.028},
journal = {Journal of Solid State Chemistry},
number = C,
volume = 258,
place = {United States},
year = {Thu Sep 28 00:00:00 EDT 2017},
month = {Thu Sep 28 00:00:00 EDT 2017}
}

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