TY  - JOUR
AU  - König, Björn
AU  - Ronsin, Olivier J. J.
AU  - Harting, Jens
TI  - Two-dimensional Cahn–Hilliard simulations for coarsening kinetics of spinodal decomposition in binary mixtures
JO  - Physical chemistry, chemical physics
VL  - 23
IS  - 43
SN  - 1463-9076
CY  - Cambridge
PB  - RSC Publ.
M1  - FZJ-2021-04880
SP  - 24823 - 24833
PY  - 2021
AB  - The evolution of the microstructure due to spinodal decomposition in phase separated mixtures has astrong impact on the final material properties. In the late stage of coarsening, the system ischaracterized by the growth of a single characteristic length scale LBCta. To understand thestructure–property relationship, the knowledge of the coarsening exponent aand the coarsening rateconstant Cis mandatory. Since the existing literature is not entirely consistent, we perform phase fieldsimulations based on the Cahn–Hilliard equation. We restrict ourselves to binary mixtures using asymmetric Flory–Huggins free energy and a constant composition-independent mobility term and showthat the coarsening for off-critical mixtures is slower than the expected t1/3-growth. Instead, we find atobe dependent on the mixture composition and associate this with the observed morphologies. Finally,we propose a model to describe the complete coarsening kinetics including the rate constant C.
LB  - PUB:(DE-HGF)16
C6  - 34714899
UR  - <Go to ISI:>//WOS:000712542700001
DO  - DOI:10.1039/D1CP03229A
UR  - https://juser.fz-juelich.de/record/903156
ER  -