EFFECT OF SACCHARIN CONCENTRATION ON THE MICROSTRUCTURE OF THE ELECTRODEPOSITED Ni-Fe

摘要

The effect of saccharin concentration on the microstructure of invar, Fe-36wt% Ni, during pulsed current electrodeposition was investigated. At low concentration of saccharin in the electrolyte, the deposits are mainly composed of nano-sized fee grains while the bcc phase becomes predominant as the amount of saccharin in the electrolyte increases. From TEM results, it is found that bcc grains have grown to micron-size, but tec grains remain nano-size in spite of the change in preferred orientation.