Effect of 2-butyne-1,4-diol on the microstructure and internal stress of electrodeposited Fe-36 wt.%Ni alloy films

Fe-36 wt.%Ni alloy film was prepared through direct current electrodeposition to investigate the effect of 2-butyne-1,4-diol(BD) on the microstructure and internal stress of the deposited films. The deposits composition was not affected by the addition of BD when its concentration in the electrolyte was above 0.2 g/L. All the film surfaces exhibited a flat and compact appearance. X-ray diffraction analyse revealed a phase of solid solution of iron in face centered cubic nickel, and the addition of BD caused strong (1 1 1) texture. The measurement of internal stresses showed a decrease of compressive stress with addition of BD in the electrolyte, and at the concentration of 0.4 g/L, tensile stress showed up in the film and caused some micro-cracks parallel to the surface.