Abstract
Effect of pulse plating on novel electrodeposited binary and ternary amorphous alloys was studied by 57Fe and 119Sn conversion electron Mossbauer spectroscopy and X-ray diffraction. Our results show that by adjusting the parameters of pulse plating a fine tuning of the composition and current efficiency can be achieved within these systems. On the contrary to direct current deposition, where the crystalline FeSn2 phase dominates, pulse plating technique produces amorphous Sn-Fe alloy phases, of which the ferromagnetic phase is the dominant one. Both, direct current and pulse plated Sn-Ni deposits consist of paramagnetic alloy phases and minor amounts of β-Sn, the occurrence of which correlates with the tin content of the samples. Pulse plated Sn-Ni-Fe coatings are amorphous and in a dominantly ferromagnetic state, however at long on- and off-pulse times and high peak current density the paramagnetic state dominates and β-Sn segregation also occurs.
Published Version
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