Temperature dependence of solute segregation energies at W GBs from first principles
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In: Scripta materialia, Vol. 222.2023, No. 1 January, 115059, 01.01.2023.
Research output: Contribution to journal › Article › Research › peer-review
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TY - JOUR
T1 - Temperature dependence of solute segregation energies at W GBs from first principles
AU - Scheiber, Daniel
AU - Popov, Maxim N.
AU - Romaner, Lorenz
N1 - Publisher Copyright: © 2022 Acta Materialia Inc.
PY - 2023/1/1
Y1 - 2023/1/1
N2 - Grain boundary segregation energies of solute elements play a decisive role for alloy design. So far, the temperature dependence of these energies has been neglected in first principles modelling, whereas in experimental assessments, they received a lot of attention. We compute the free energies of segregation from first principles for typical alloying elements and find that the vibrational contribution to segregation energies is substantial and affects solute enrichment. Our results clarify the origin of the entropy of segregation, which has been discussed so far only on experimental basis.
AB - Grain boundary segregation energies of solute elements play a decisive role for alloy design. So far, the temperature dependence of these energies has been neglected in first principles modelling, whereas in experimental assessments, they received a lot of attention. We compute the free energies of segregation from first principles for typical alloying elements and find that the vibrational contribution to segregation energies is substantial and affects solute enrichment. Our results clarify the origin of the entropy of segregation, which has been discussed so far only on experimental basis.
UR - http://www.scopus.com/inward/record.url?scp=85138448312&partnerID=8YFLogxK
U2 - 10.1016/j.scriptamat.2022.115059
DO - 10.1016/j.scriptamat.2022.115059
M3 - Article
VL - 222.2023
JO - Scripta materialia
JF - Scripta materialia
SN - 1359-6462
IS - 1 January
M1 - 115059
ER -