Moessbauer Studies of Electrodeposited and Ion Beam Mixed Alloy Coatings

摘要

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℃. 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 Sn_3Cr_2 phase (δ = 2.3 mm/s, Δ = 1.2 mm/s) appears in Sn―Cr alloys. The quantity of the Sn_3Cr_2 phase increases with the milling time.