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- W4377291358 abstract "In this work, we studied the energetics of diffusion-related quantities of transition-metal impurities in TiN, a prototype ceramic protective coating. We use ab-initio calculations to construct a database of impurity formation energies, vacancy-impurity binding energies, migration, and activation energies of 3d and selected 4d and 5d elements for the vacancy-mediated diffusion process. The obtained trends suggest that the trends in migration and activation energies are not fully anti-correlated with the size of the migration atom. We argue that this is caused by a strong impact of chemistry in terms of binding. We quantified this effect for selected cases using the density of electronic states, Crystal Orbital Hamiltonian Population analysis, and charge density analysis. Our results show that the bonding of impurities in the initial state of a diffusion jump (equilibrium lattice position), as well as the charge directionality at the transition state (energy maximum along the diffusion jump pathway), significantly impact the activation energies." @default.
- W4377291358 created "2023-05-23" @default.
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- W4377291358 date "2023-05-22" @default.
- W4377291358 modified "2023-09-30" @default.
- W4377291358 title "Impact of d-states on transition metal impurity diffusion in TiN" @default.
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- W4377291358 doi "https://doi.org/10.1038/s41598-023-34768-7" @default.
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- W4377291358 hasPublicationYear "2023" @default.
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