M. SHAHIRLARI - Department of Materials Science and Engineering, Tarbiat Modares University, P.O. Box ۱۴۱۱۵-۱۴۳, Tehran, Iran
P. ALIZADEH - Department of Materials Science and Engineering, Tarbiat Modares University, P.O. Box ۱۴۱۱۵-۱۴۳, Tehran, Iran
S. A. KHALIFE SOLTANI - Department of Composites Research, Malek Ashtar University, P.O Box ۱۱۳۶۵-۹۴۶۶, Tehran, Iran
V. KHANI - Department of Materials Science and Engineering, Tarbiat Modares University, P.O. Box ۱۴۱۱۵-۱۴۳, Tehran, Iran

In this study, EPD, as a simple and low cost method, was used to coat the graphite substrate with a nano-sized SiC-Si oxidation protective coating with the ratio of 1:1. Different organic solvents used as suspension media in pre-experiments and finally Ethanol as the media, 1.4 g L of iodine as the additive, and coating parameters of 180s and 40 V for time and voltage respectively, were applied. Analysis of the kinetics of deposition revealed a linear behavior which changed as the coating thickened. In order to increase the strength of the coating and formation of SiN, direct nitridation was performed at 1400 and 1450 °C. The latter was found to be more appropriate. Microstructural analysis and recognition of phases were performed using SEM and XRDrespectively.

graphite, nano SiC, electrophoretic deposition, Direct nitridation