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Evolution of Discontinuity in Particle Orientation in Ceramic Tape Casting
Author(s) -
Chantaramee Napat,
Tanaka Satoshi,
Takahashi Tsutomu,
Uematsu Keizo
Publication year - 2008
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.1551-2916.2008.02605.x
Subject(s) - slurry , materials science , tape casting , particle (ecology) , composite material , dimensionless quantity , ceramic , particle size , discontinuity (linguistics) , flow (mathematics) , mineralogy , casting , geometry , mechanics , chemistry , physics , mathematics , geology , mathematical analysis , oceanography
Flow‐induced particle orientation has been studied using aqueous slurry containing slightly anisometric particles (α‐Al 2 O 3 ). A detailed description of particle alignment in green tape was quantified with a cross‐polarized light microscope. Correlations among the exerted pressure in terms of H slurry / L , dimensionless flow profile, and particle packing structure were presented. Pressure‐driven flow with a large H slurry / L value was found to promote a nonuniform particle packing structure (Type‐I) observed through the tape thickness, while shear‐driven flow was found to induce a relatively uniform packing structure, as the long axes of particles were mainly aligned in the casting direction (Type‐II).