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Rheology of Zirconia-Alumina Gelcasting Slurries

Published online by Cambridge University Press:  25 February 2011

A. Bleier ,
O. O. Omatete  and
C. G. Westmoreland
A. Bleier
Affiliation:
Oak Ridge National Laboratory, P. O. Box 2008, Oak Ridge TN 37831
O. O. Omatete
Affiliation:
Oak Ridge National Laboratory, P. O. Box 2008, Oak Ridge TN 37831
C. G. Westmoreland
Affiliation:
Oak Ridge National Laboratory, P. O. Box 2008, Oak Ridge TN 37831
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Abstract

The rheology of zirconia-alumina composite slurries for gelcasting was studied in order to maximize the solids loading. The viscosity and yield stress were controlled by adjusting the pH. This approach allows the solids loading to be maximized for the gelcasting of near-net-shape composites. A strong correspondence exists among the rheological behavior, the surface charge on the particles, colloidal stability, and the maximum solids loading. The best pH conditions for gelcasting composites depends on the specific binary composition.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 271: Symposium N – Better Ceramics Through Chemistry V , 1992 , 269
Copyright
Copyright © Materials Research Society 1992

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References

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