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Effect of the Substrate on the Constrained Sintering of BaLa 4 Ti 4 O 15 Thick Films
Author(s) -
Amaral Luís,
Jamin Christine,
Senos Ana M. R.,
Vilarinho Paula M.,
Guillon Olivier
Publication year - 2012
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2012.05466.x
Subject(s) - sintering , materials science , foil method , microstructure , platinum , grain growth , substrate (aquarium) , grain size , composite material , metallurgy , catalysis , chemistry , biochemistry , oceanography , geology
This study focuses on constrained sintering of Ba La 4 Ti 4 O 15 ( BLT ) thick films on Pt foils and BLT rigid substrates. The densification of BLT films is only retarded in comparison with their bulk counterpart, but, and in opposition to other constrained systems investigated until now, grain growth is favored in constrained BLT films. An additional degree of constraint is provided by using a rigid BLT substrate instead of a compliant platinum foil, which induces even larger coarsening. These observations point to the possible effect of mechanical stress developing during constrained sintering on the microstructure development.