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• W2799686488 abstract "Diffusion of Fe and Ni and the energetics of Fe- and Ni-related defects in chromium oxide (α–Cr2O3) are investigated using first-principles Density Functional Theory calculations in combination with the climbing-image nudged elastic band method. The orientations of the spin magnetic moments of the migrating ions are taken into account and their effects on migration barriers are examined. Several possible diffusion pathways were explored through interstitial and vacancy mechanisms, and it was found that the principal mode of ion transport in Cr2O3 is via vacancies. Both interstitial- and vacancy-mediated diffusions are anisotropic, with diffusion being faster in the z-direction. The energetics of defect formation indicates that the Ni-related defects are less stable than the Fe-related ones. This is consistent with Ni-diffusion being faster than Fe-diffusion. The results are compared with previous theoretical and experimental data and possible implications in corrosion control are discussed." @default.
• W2799686488 created "2018-05-17" @default.
• W2799686488 creator A5004674263 @default.
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• W2799686488 date "2018-04-19" @default.
• W2799686488 modified "2023-10-13" @default.
• W2799686488 title "First-principles investigation of diffusion and defect properties of Fe and Ni in Cr2O3" @default.
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• W2799686488 doi "https://doi.org/10.1063/1.5013608" @default.
• W2799686488 hasPublicationYear "2018" @default.
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