| Surface Free Energy of TiC layers deposited by electrophoretic deposition (EPD) |
| Paper ID : 1106-UFGNSM-FULL |
| Authors: |
|
Mohammadreza Gorji, Sohrab Sanjabi * Tarbiat Modares University |
| Abstract: |
| In this study surface free energy (i.e. γs) of TiC with three different particle sizes (i.e. ~ 20 nm, 0.7 µm and 10 µm) and synthesized core - shell structure of TiC/Ni-P coatings were determined via measuring contact angles of distilled water and diiodemethane liquids. TiC/Ni-P core – shell structures were prepared by electroless plating of Ni-P onto activated surfaces of TiC. The coatings were deposited by EPD from an organic mixture at the voltage and duration time of 60 V and 2 min respectively. Zeta potential of EPD suspensions, morphology, phase structure and topography of as-EPD layers were investigated through Zetasizer, field emission scanning electron microscopy (FESEM), X-ray diffraction (XRD) and atomic force microscopy (AFM) instruments respectively. According to the results existence of a Ni-P layer around the TiC particles has led to roughness (i.e. at least 0.1 µm), and porosity mean length (i.e. at least 1 µm) increase. This might be related to various sizes of TiC agglomerates formed during electroless plating. It has been observed that γs changed from 44.49 to 54.12 mJ.m-2 as a consequence of particle size enlargement for TiC. The highest (67.25 mJ.m-2) and lowest (44.49 mJ.m-2) γs were measured for TiC nanoparticles which showed ~ 1.5 increase in surface free energy after being plated with Ni-P. |
| Keywords: |
| EPD coating; Electroless plating; Surface free energy |
| Status : Paper Accepted (Poster Presentation) |
