Effects of Au2+ irradiation induced damage in a high-entropy pyrochlore oxide single crystal. (November 2022)

• Record Type: Journal Article
• Authors: Kinsler-Fedon, Candice; Nuckols, Lauren; Nelson, Christopher T.; Qi, Zehui; Huang, Qing; Mandrus, David; Zhang, Yanwen; Weber, William J.; Keppens, Veerle
• Is Part Of: Scripta materialia. Number 220(2022)
• Publication Date: 2022-11
• Subjects: High-entropy pyrochlore -- Ion irradiation -- Single crystal -- Rutherford backscattering spectrometry -- Transmission electron microscopy; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2022.114916
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: We report an ion-irradiation study of a compositionally complex (high-entropy) pyrochlore oxide. The damage produced from 4 MeV Au 2+ ion irradiation on single crystal (Yb0.2 Tm0.2 Lu0.2 Ho0.2 Er0.2 )2 Ti2 O7 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. Graphical abstract: Image, graphical abstract