Abstract
Rapid quenching of hypereutectic Bi-Mn alloys with compositions ranging from Bi-1.5wt% Mn (Bi-5 at% Mn) to Bi-20 wt% Mn (Bi-50 at% Mn) was carried out to achieve an optimum constitution of the ferromagnetic MnBi phase. Microstructural investigations by optical and electron microscopy techniques revealed the presence of very fine MnBi particles in the as-spun samples. The results of the microstructural and thermal analysis studies have indicated that it is possible to achieve control over the size and amount of the ferromagnetic phase by melt spinning. Some initial results of magnetic properties of melt-spun ribbons are also presented.
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