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@ARTICLE{Vinograd:904127,
author = {Vinograd, Victor L. and Bukaemskiy, Andrey A.},
title = {{I}on distribution models for defect fluorite {Z}r{O}2 -
{AO}1.5 ({A} = {L}n, {Y}) solid solutions: {II}.
{T}hermodynamics of mixing and ordering},
journal = {Acta materialia},
volume = {202},
issn = {1359-6454},
address = {Amsterdam [u.a.]},
publisher = {Elsevier Science},
reportid = {FZJ-2021-05697},
pages = {55 - 67},
year = {2021},
abstract = {Thermodynamic mixing properties of AxB1-xO2-0.5xV0.5x,
fluorite-type solid solutions (B = Zr, A = {Nd-Yb, Y}, V =
oxygen vacancy) are modelled as functions of four
parameters, ΔH1, ΔH2, ΔH3 and ΔH4, which correspond to
the enthalpy effects of the reactions 6A + 8B = 7A + 7B (1),
6A + 8B = 8A + 6B (2), 6B + 8B = 7B + 7B (3) and 6A + 8A =
7A + 7A (4), involving six cation species, 6A, 7A, 8A, 6B,
7B and 8B. The model predicts that the disordered
configuration containing all cation species evolves with the
decreasing temperature such that 6-fold coordinated cations
tend to vanish within 0 ≤ x ≤ 1/2 domain, while 8-fold
coordinated cations become extinct within 1/2 ≤ x ≤ 1
domain. The further evolution within the intervals of 0 ≤
x ≤ 1/3, 1/3 ≤ x ≤ 1/2, 1/2 ≤ x ≤ 2/3 and 2/3 ≤
x ≤ 1 favours the extinction of 7A, 8B, 7B and 6A cation
species, respectively. With the further decrease in the
temperature 6-fold B and 8-fold A cations reappear within
the domains of 1/3 ≤ x ≤ 1/2 and 1/2 ≤ x ≤ 2/3 via
the reaction 7A + 7B = 8A + 6B. The configurational entropy
reduces along with these transformations. The model fits
structural and calorimetric data on Zr-based
AxB1-xO2-0.5xV0.5x systems and provides hints to
understanding of ionic conductivity and radiation
susceptibility data.},
cin = {IEK-6},
ddc = {670},
cid = {I:(DE-Juel1)IEK-6-20101013},
pnm = {1411 - Nuclear Waste Disposal (POF4-141) / BMBF-02NUK021A -
Verbundprojekt Conditioning: Grundlegende Untersuchungen zur
Immobilisierung langlebiger Radionuklide mittels Einbau in
endlagerrelevante Keramiken; Teilprojekt A (BMBF-02NUK021A)},
pid = {G:(DE-HGF)POF4-1411 / G:(DE-Juel1)BMBF-02NUK021A},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000599842800005},
doi = {10.1016/j.actamat.2020.10.046},
url = {https://juser.fz-juelich.de/record/904127},
}