抄録
Physical properties and crystal structures of gold layers deposited from cyanide bath and citrate baths A and B in the previous paper are researched in this paper.
The following results were obtained.
1) Values of hardness, tensile strength, electric resistivity, and lattice constants of deposits obtained from the above baths were different one another among the three baths and also distinctly different from their bulk values. All values obtained in the deposits from cyanide bath and citrate bath A were nearly the same. However, all the values from citrate bath B were different from those obtained from the former two; the last gave higher hardness, higher abrasion resistance, lower electric resistivity, and less tensile strength than cyanide bath.
2) The surface structure of gold layers from citrate bath B gave the highest smoothness and least pits.
3) The crystal structures of gold layers obtained from the baths were nearly identical between cyanide bath and citrate bath A; except for the latter contained many twins and the former showed dislocation lines in crystal grains.
Whereas, the deposits from citrate bath B showed internal stress, twins, and stacking faults in crystal grains.
4) Correlation between physical properties and crystal structures were made clear, but some problems still remained unsolved.
