Department of Materials Science and Engineering, National Cheng Kung University
○Delphic Chen Han-Hong Wang Jui-Chao Kuo

In this study, nanocrystalline aluminum was prepared by direct current electrodeposition method. The aluminum chloride and dimethylsulfone mixture were used as the electrolyte for the electrodeposition process. The influence of current density did on the electrodeposited layers was discussed in this study. The grain size of the electrodeposited layer produced by different current density was calculated from the broadening peak of the Xray diffraction peak with Scherrer's Formula. On the other hand, the microstructure of the electrodeposited layer was determined by the Xray diffraction and further texture analysis was conducted by pole figure analysis. The elemental composition of the electrodeposited layer was examined with the EDS and the surface was observed by the SEM. Microvickers test was used to determine the hardness of the sample from different current density conditions. In addition to the above analyses, the morphology of coatings was investigated by using nano-focus.