Effects of Au2+ irradiation induced damage in a high-entropy pyrochlore oxide single crystal

Kinsler-Fedon, Candice; Nuckols, Lauren; Nelson, Christopher T.; Qi, Zehui; Huang, Qing; Mandrus, David; Zhang, Yanwen; Weber, William J.; Keppens, Veerle

doi:10.1016/j.scriptamat.2022.114916

Effects of Au2+ irradiation induced damage in a high-entropy pyrochlore oxide single crystal

Journal Article · Sat Jul 16 00:00:00 EDT 2022 · Scripta Materialia

DOI:https://doi.org/10.1016/j.scriptamat.2022.114916· OSTI ID:1886454

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Univ. of Tennessee, Knoxville, TN (United States)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS)
Univ. of Tennessee, Knoxville, TN (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science & Technology Division

Here, we report an ion-irradiation study of a compositionally complex (high-entropy) pyrochlore oxide. The damage produced from 4 MeV Au²⁺ ion irradiation on single crystal (Yb_0.2Tm_0.2Lu_0.2Ho_0.2Er_0.2)₂Ti₂O₇ aligned along the [100] direction is investigated at room temperature by Rutherford backscattering spectrometry in channeling mode (RBS/C). Damage profiles based on RBS/C are presented and compared to single-component pyrochlore titanate oxides to evaluate the relative resistance to irradiation-induced amorphization. The results show that this high-entropy pyrochlore goes amorphous at a dose of 0.13 dpa, which is comparable to that of single-component pyrochlores previously studied. Transmission electron microscopy images unveil the damaged surface layer, which is consistent with the RBS/C results.

View Accepted Manuscript (DOE)

Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: National Science Foundation (NSF); USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division; University of Tennessee

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 1886454

Journal Information:: Scripta Materialia, Journal Name: Scripta Materialia Vol. 220; ISSN 1359-6462

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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