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Dense, bubble-free ceramic deposits from aqueous suspensions by electrophoretic deposition

Published online by Cambridge University Press:  31 January 2011

Tetsuo Uchikoshi ,
Kiyoshi Ozawa ,
Benjamin D. Hatton  and
Yoshio Sakka
Tetsuo Uchikoshi
Affiliation:
National Research Institute for Metals, 1-2-1 Sengen, Tsukuba, Ibaraki 305–0047, Japan
Kiyoshi Ozawa
Affiliation:
National Research Institute for Metals, 1-2-1 Sengen, Tsukuba, Ibaraki 305–0047, Japan
Benjamin D. Hatton
Affiliation:
National Research Institute for Metals, 1-2-1 Sengen, Tsukuba, Ibaraki 305–0047, Japan
Yoshio Sakka
Affiliation:
National Research Institute for Metals, 1-2-1 Sengen, Tsukuba, Ibaraki 305–0047, Japan
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Abstract

The characteristics of electrophoretic deposition (EPD) of positively charged particles onto a cathode were investigated using aqueous alumina and zirconia suspensions. The deposition was performed using several kinds of metal substrates at different current densities. For most substrate materials, a large number of macropores appeared in the deposit, and their size increased with the current density due to gas bubble formation. However, no macropores were formed in the deposit on a palladium substrate, regardless of the current density. The green density and sintering properties of the EPD deposits on a palladium substrate from aqueous suspensions were the same as from slip casting. Bubble-free zirconia/alumina laminate composites were also fabricated by EPD from aqueous suspensions.

Type
Rapid Communications
Information
Journal of Materials Research , Volume 16 , Issue 2 , February 2001 , pp. 321 - 324
Copyright
Copyright © Materials Research Society 2001

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References

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