Influence of pores arrangement on stability of photonic structures during sintering

Discrete Element Method (DEM) has been used for numerical investigation of sintering-induced structural deformations occurring in inverse opal photonic structures. The influence of the initial arrangement of template particles on the stability of highly porous inverse opal α-Al2O3 structures has bee...

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Bibliographic Details
Published in:Journal of the European Ceramic Society 2020-10, Vol.40 (13), p.4562-4571
Main Authors: Dosta, M., Furlan, K.P., Skorych, V., Heinrich, S., Janssen, R.
Format: Article
Language:English
Subjects:
Discrete element method (DEM)
Inverse opals
Ordered macroporous structures
Sintering
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Summary:Discrete Element Method (DEM) has been used for numerical investigation of sintering-induced structural deformations occurring in inverse opal photonic structures. The influence of the initial arrangement of template particles on the stability of highly porous inverse opal α-Al2O3 structures has been analyzed. The material transport, densification, as well as formation of defects and cracks have been compared for various case studies. Three different stages of defects formation have been distinguished starting with local defects ending with intrapore cracks. The results show that the packing of the template particles defined during the template self-assembly process play a crucial role in the later structural deformation upon thermal exposure. The simulation results are in very good agreement with experimental data obtained from SEM images and previous studies by ptychographic X-ray tomography.
ISSN:0955-2219
1873-619X
DOI:10.1016/j.jeurceramsoc.2020.04.019