Multi-step Electrophoretic Deposition of α-Al2O3 Nanoparticles on Carbon Substrate (TECHNICAL NOTE)

in the present study, electrophoretic deposition (EPD) was used to obtain dense and crack-free layers of Al2O3 on carbon substrate. Microstructural study of the obtained layers by scanning electron (SEM) and optical microscopy (OM) approved that crack-free layers can be obtained by EPD technique. According to obtained results, isopropanol is a suitable media to obtian compact layers which is attributed to unique properties of this media. The crack- free layers were obtained using multi-step electrophretic depostion while using continous EPD process led to the deposition of severly cracked layers. It seems that cracking behaviour of electrophoretically deposited films depends on drying conditions.