| 초록 |
We electro-deposited magnetic materials on aluminum using a multi-step deposition process to prevent Al from being self-reactive and oxidized in the air. The galvanic displacement reaction (GDR) driven by the reduction potential difference degrades adhesion between Al and magnetic film, causing difficulties in electrodeposition. In order to suppress the GDR, we performed the first electro-deposition step at 5℃. Then, in the second step, to increase the thickness of the Ni-Co thin films were electro-deposited at 40℃ to increase the activity of metal ions. Due to the multi-step process, magnetic materials were evenly electro-deposited on the aluminum substrate, and good adhesion between the material and substrate was confirmed. We investigated the magnetic properties of the materials according to the metal composite ratios obtained at different electro-deposition current densities. We also optimized experimental conditions with regard to thin film thickness, the ratio of magnetic materials, and magnetic properties to fabricate magnetic thin films suitable for application in induction heating cookers. |
