CETMIC 05378
CENTRO DE TECNOLOGIA DE RECURSOS MINERALES Y CERAMICA
Unidad Ejecutora - UE
artículos
Título:
Effect of zirconia tape porosity on fluorapatite surface film formation by dip coating
Autor/es:
M P. ALBANO; L.B. GARRIDO
Revista:
CERAMICS INTERNATIONAL
Editorial:
ELSEVIER SCI LTD
Referencias:
Lugar: Amsterdam; Año: 2013 vol. 39 p. 29 - 37
ISSN:
0272-8842
Resumen:
Thin fluorapatite (FA)layers on porous 3mol %yttria-partially stabilized zirconia(Y-PSZ) substrates have been fabricated by dipping porous zirconia tapes into aqueous 27.4 vol% fluorapatite slurries. Two porous Y-PSZ tapes with different volume fraction of porosity were developed using an acrylic latex binder:
tapes with 31.4vol % porosity were prepared using 16.6 vol% starch as
fugitive additive and those with 12.7 vol % porosity were fabricated
without starch. The influence of the porous structure of the tape surfaces,
top and bottom, on the casting rate and consequently on the layer
thickness formed on each surface was studied. Layers formed on the top
and bottom surface sof the tapes with 12.7 and 31.4 vol% porosity were c
ompared. The formation of a thin layer on the surface of the tape was
governed by both liquid entrainment and slip casting mechanisms. The
data for the FA layer formation were in good agreement with the slip casting model for immersion times up to 40 s.
