A Study of the Magnetic Characteristics of Cu–Mn–Bi Alloys

Resumo

The phase composition and the magnetic characteristics of 20 as-cast of Cu–Mn–Bi alloy samples have been studied experimentally. The samples have been studied using scanning electron microscopy, electron-probe microanalysis, atomic emission with inductive-coupled plasma, and X-ray diffraction analysis. The magnetic characteristics of the alloys are studied by a vibration method at room temperature. The samples contain the α-MnBi and Mn₃Cu₄Bi₄ intermetallic compounds along with a copper-based solid solution and bismuth precipitates. The α-Mn phase can precipitate at high manganese contents in the sample compositions. The magnetic characteristics of the alloys are dependent on the volume proportion of the phases. A high of intermetallic compound content leads to an increase in the magnetic susceptibility of the samples up to the manifestation of their ferromagnetic properties. In addition, Vickers microhardness HV_0.1 is measured.