:Electrodeposition of Gold on Rolled Pure Iron

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This paper describes the electronmicroscopic examination of nucleation, growth, and microstructure of Au films electrodeposited on cold-rolled pure Fe. The (001) Fe single crystals were rolled by reductions of 25, 50, and 75%. The number of nuclei formed on these substrates increased with the increase of reduction ratio. The number of nuclei on rolled Fe of 75% reduction was about 3×1011cm-2 at maximum, which seemed to show the preferential occurrence of nucleation in the strained fields around the dislocations on the substrate surface. However, the growth morphology of these particles was identical with that of particles deposited on annealed pure Fe. Many micro-twins had been introduced in Au films to relax the strains of Au films inherited from the strains of substrate. The number of formation of these twins was maximum when the film grew up into net-work structure. The (001) Au plane in the Au plate crystals tended to be oriented in parallel to the (001) Fe plane. However, in a diffraction pattern, the Debye-Scherrer ring co-existed with the N-pattern.
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