DFT Calculations to Study Hydrogen Localization and Diffusion in Disordered Bcc Ti-V-Cr Alloys
2019 ◽
Vol 289
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pp. 205-211
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Keyword(s):
Here we report on the results of our theoretical study of hydrogen localization and motion in disordered bcc Ti-V-Cr alloys. The calculations have been carried out within a DFT supercell approach for a certain composition, namely Ti0.33V0.27Cr0.4 for H/M = 1/32. It was found that hydrogen is localized in highly distorted tetrahedral sites formed by different metal species. H atoms are displaced towards titanium. The estimation of the hydrogen diffusion parameters provides the activation energy value of 0.126 eV and the diffusion coefficient at 294 K equal to 1.9 10-10 m/s2 that is in good agreement with available experimental data.
Keyword(s):
2019 ◽
Vol 11
(5)
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pp. 250
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2005 ◽
Vol 480-481
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pp. 197-200
Keyword(s):
2021 ◽
Vol ahead-of-print
(ahead-of-print)
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2013 ◽
Vol 205-206
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pp. 364-369
Keyword(s):
2008 ◽
Vol 273-276
◽
pp. 381-387
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2020 ◽
Vol 24
(2)
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pp. 121-127