Table of Contents
Journal of Ceramics
Volume 2014, Article ID 370851, 6 pages
Research Article

Preparation of Stable ZrB2-SiC-B4C Aqueous Suspension for Composite Based Coating: Effect of Solid Content and Dispersant on Stability

1Department of Materials Engineering, Faculty of Engineering, Tarbiat Modares University, P.O. Box 1411713116, Tehran, Iran
2Department of Chemical and Materials Engineering, University of Alberta, Edmonton, AB, Canada T6G 2V4
3School of Engineering, Shahid Rajaee University, P.O. Box 16785-136, Tehran, Iran

Received 26 February 2014; Revised 5 August 2014; Accepted 24 August 2014; Published 7 September 2014

Academic Editor: Keizo Uematsu

Copyright © 2014 Mehri Mashadi et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


ZrB2-SiC-B4C aqueous suspension has been prepared using poly(ethyleneimine) as a dispersant. Since increasing the solid content of suspension leads to high compaction and consequently low porosities through final coat, the effect of solid content has been studied. The dispersant and solid content were changed in the range of 0.3–1.5 wt.% and 45–55 vol.%, respectively, to assess the optimal conditions effect on stability and characteristics of suspension. Results of zeta potential measurements and rheological analysis at pH 7.8 showed that the composite suspension including 45 vol.% solid content and 1.5 wt.% dispersant was in stable state.