Modification of rhenium coating The as prepared
Effect of magnetic field gradient on the morphology of nickel deposits can be seen in Fig. 5. The micrographs were taken from two different positions of one sample of nickel electrodeposits. One position was near the center of the sample (Fig. 5a) and another position was near the edge of the sample (Fig. 5b). As seen in the schematic diagram of Fig. 2, the lines of a magnetic field SAR-302503 attracted toward the edges of an electrodeposited sample of a magnetic metal such as nickel. Thus, the sample margins near the edges are regions of high density magnetic field which enhance ionic mass transport. This magnetic field gradient induced convection should produce electrodeposits with large colonies and rough surface. This is gap junctions clearly seen in Fig. 5b which is the micrograph of a point near the edge of a nickel electrodeposit. In contrast, Fig. 5a shows the micrograph taken from a region toward the center of the electrodeposit where the magnetic field gradient is not high. Consequently, the deposit is relatively smooth and does not have colonies. This morphology is similar to the morphology of the nickel coating electrodeposited without applying a magnetic field (Fig. 3) or the morphology of nickel electrodeposit with a magnetic field applied perpendicular to the cathode surface during its electrodeposition (Fig. 4b).