2017 Volume 57 Issue 12 Pages 2214-2219
Effects of Si solid solution in Fe substrate on the formation of Fe–Zn intermetallic phase layers between the Fe(-Si) substrate and liquid Zn were investigated using a combinatorial technique. The formation of ζ-FeZn13 layer was promoted by Si solid solution up to 2 at.% in the Fe substrate but retarded by further solution. The formation of δ1-FeZn7-10 phase and Γ-Fe3Zn10 phase was retarded by Si solid solution up to 10 at.%. The rate of Fe dissolution from the Fe substrate to the liquid Zn region and the Fe/Zn/Si contents in the δ1 phase were analyzed as a function of Si content in the substrate. The results obtained suggest that the retardation of the Fe–Zn phase formation is caused by a difficulty in the nucleation of δ1 phase at lower Si contents less than 3 at.% and by a decrease in the rate of Fe dissolution at higher Si contents.