Abstract
The following results were obtained on the formation and morphology of electrodeposited Au-films on iron substrate surfaces by electron microscopy and scanning electron microscopy.
1) The electrodeposited Au-films consisted of two layers. One was a layer of Au plate crystals, which were bright golden colored and had been coherently developed over the iron substrate surfaces. The other was a layer of spindle dendrites, which were dark brown colored by irregular reflectron on their rugged surfaces and had been developed over the Au plate crystals.
2) In the initial stage of the growth of dendrites, they were observed in the shape of sphere or semi-sphere on the Au plate crystals.
3) The dendrites were developed to spindle shape having twigs and branches with the lapse of deposition time.
4) No difference was observed in the shape of Au dendrites for substrates with different Miller's indices.
5) The coherences found between Au plate crystals and iron substrate surfaces were as follows.
(001) Fe||(001)Au [110]Fe||[010]Au} (1) (110)Fe||(110)Au [001]Fe||[110]Au} (2)
6) Some micro-particles, which had different crystal orientations from those of the plate crystals, had been observed on the outside of the plate crystals since the initial stage of deposition.
