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Constrained Drying of Aqueous Yttria‐Stabilized Zirconia Slurry on a Substrate. I: Drying Mechanism
Author(s) -
Lan Weihua,
Xiao Ping
Publication year - 2006
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.1551-2916.2006.00928.x
Subject(s) - materials science , slurry , composite material , coating , cubic zirconia , shrinkage , yttria stabilized zirconia , aqueous solution , substrate (aquarium) , chemistry , ceramic , oceanography , geology
Aqueous yttria‐stabilized zirconia slurry was cast on a substrate to form wet coatings. Both weight loss and thickness reduction were measured, during the drying process. Lateral drying was observed by in situ monitoring of the coating surface. The drying kinetics were classified as an initial constant rate period (CRP), followed by a falling rate period (FRP). Thickness reduction occurred in the CRP stage, and was uneven across the coating because of lateral flow. As tensile stresses developed within the coating because of the constrained volume shrinkage, crack formation and propagation occurred in the FRP stage and affected the drying rate.