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@ARTICLE{HTZER:887837,
author = {HÖTZER, Johannes and REHN, Veronika and RHEINHEIMER,
Wolfgang and HOFFMANN, Michael J. and NESTLER, Britta},
title = {{P}hase-field study of pore-grain boundary interaction},
journal = {Journal of the Ceramic Society of Japan},
volume = {124},
number = {4},
issn = {1348-6535},
address = {Tokyo},
publisher = {Soc.},
reportid = {FZJ-2020-04463},
pages = {329 - 339},
year = {2016},
abstract = {During final stage sintering, a complex interplay of
densification and grain growth dominates microstructural
evolution. Grain growth starts, when pore drag effects
become less important due to pore shrinkage. This grain
growth then decreases the driving force available for
sintering. Accordingly, the interplay of pores and grain
boundaries needs to be considered in detail. A phase-field
model was extended to treat pore dynamics under
consideration of pressure stability. To study pore
attachment and detachment at moving interfaces, an idealized
hexagonal microstructure with a constant driving force
relationship for pore migration is constructed.
Additionally, realistic polycrystalline microstructures were
used. The model is in good agreement with experiments and
analytic equations. Three different cases were observed in
the realistic microstructure: pore attachment at the moving
interface, partial and total pore detachment. However, in
the partial case, the initial location of pores was found to
be important: pores tend to migrate from quadruple junctions
over triple junctions to grain boundary planes, where they
eventually detach. This results in a variation of pore
detachment, which is not captured in analytic equations.
Therefore large simulation setups are required to reflect
the impact of initial pore location on pore drag effects.},
cin = {IEK-1},
ddc = {660},
cid = {I:(DE-Juel1)IEK-1-20101013},
pnm = {899 - ohne Topic (POF3-899)},
pid = {G:(DE-HGF)POF3-899},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000379610100010},
doi = {10.2109/jcersj2.15266},
url = {https://juser.fz-juelich.de/record/887837},
}