TY - JOUR
T1 - Thickness control and interface quality as functions of slurry formulation and casting speed in side-by-side tape casting
AU - Bulatova, Regina
AU - Jabbari, Mirmasoud
AU - Kaiser, Andreas
AU - Della Negra, Michela
AU - Andersen, Kjeld Bøhm
AU - Gurauskis, Jonas
AU - Bahl, Christian R.H.
PY - 2014
Y1 - 2014
N2 - A novel method of co-casting called side-by-side tape casting was developed aiming to form thin functionally graded films with varying properties within a single plane. The standard organic-based recipe was optimized to co-cast slurries into thick graded tapes. Performed numerical simulations identified the stable flow beneath the blade with a shear rate profile independent of slurry viscosity as long as the slurry load in the casting tank was low. Thickness and interface shape could be well predicted if the rheological behaviour of slurries is known and the processing parameters are well-controlled. A well-defined steep interface was obtained by co-casting slurries with similar viscosities above 4000mPas at a speed of 40cm/min. The elastic properties of green tapes were proven to be defined by the binder concentration in the recipe formulation. The interfaces in graded tapes were shown to withstand high stresses identifying a good adhesion between side-by-side cast materials.
AB - A novel method of co-casting called side-by-side tape casting was developed aiming to form thin functionally graded films with varying properties within a single plane. The standard organic-based recipe was optimized to co-cast slurries into thick graded tapes. Performed numerical simulations identified the stable flow beneath the blade with a shear rate profile independent of slurry viscosity as long as the slurry load in the casting tank was low. Thickness and interface shape could be well predicted if the rheological behaviour of slurries is known and the processing parameters are well-controlled. A well-defined steep interface was obtained by co-casting slurries with similar viscosities above 4000mPas at a speed of 40cm/min. The elastic properties of green tapes were proven to be defined by the binder concentration in the recipe formulation. The interfaces in graded tapes were shown to withstand high stresses identifying a good adhesion between side-by-side cast materials.
KW - Tape casting
KW - Functional graded material
KW - Tape thickness
KW - Rheological properties
KW - Flow behaviour.
U2 - 10.1016/j.jeurceramsoc.2014.07.013
DO - 10.1016/j.jeurceramsoc.2014.07.013
M3 - Journal article
SN - 0955-2219
VL - 34
SP - 4285
EP - 4295
JO - Journal of the European Ceramic Society
JF - Journal of the European Ceramic Society
IS - 16
ER -