Mössbauer Studies of Electrodeposited and Ion Beam Mixed Alloy Coatings

Abstract

CEMS, XMS, XRD and electron microprobe analysis were applied to study electrode-posited and ion beam mixed Fe-Cr-Ni as well as electrodeposited and ball-milled Sn-Cr alloys. In Fe-Cr-Ni alloys with composition 40% Cr and 20–30% Ni a metastable ferromagnetic phase has been found beside a metastable paramagnetic and an equilibrium phase in all deposits. The relative occurrence of the ferromagnetic phase exhibits an increase in the plating temperature range: 30–40°C. With plating temperature an increase of the short-range order in the ferromagnetic phase was observed. The highenergy heavy ion irradiation of Fe-Ni-Cr multilayer produces ferromagnetic and paramagnetic metastable phases. The electrodeposition of Sn-Cr alloys results in metastable Sn-Cr phases. In the case of ball-milling preparation the equilibrium Sn₃Cr₂ phase (δ = 2.3 mm/s, Δ = 1.2 mm/s) appears in Sn-Cr alloys. The quantity of the Sn₃Cr₂ phase increases with the milling time.