Texture correspondence between the crystallites of h.c.p. and f.c.c. phases in two-phase electrolytic coatings of cobalt and nickel-cobalt alloys

A well-defined correspondence between the orientations of f.c.c. and h.c.p. crystallites was found upon investigation of the textures of two-phase electrolytic coatings consisting of cobalt and nickel-cobalt alloys. The orientation of only one of the phases is determined by the conditions of electrolysis. Four cases of texture correspondence were established in nickel-cobalt alloys: 〈110〉 for f.c.c. crystallites + 〈11$\text{2}$0〉 for h.c.p. crystallites; 〈211〉+〈10$\text{1}$0〉; 〈111〉 + 〈0001〉 and 〈100〉 + 〈10$\text{1}$1〉. The analysis of the texture correspondence between the preferred orientation axes of f.c.c. and h.c.p. crystallites in two-phase electrolytic coatings shows that the experimental findings are best explained if it is assumed that the texture correspondence is created during the initial stages of formation of the two phases.