Phase constitution, magnetic ordering and microstructure of the LaFe_(11.0)Co_(0.8)Si_(1.2) alloy

摘要

Microstructure and phase constitution of the LaFe_(11.0)Co_(0.8)Si_(1.2) bulk and ribbon samples in as-cast state and after annealing, were studied. For both samples in as-cast state the dominant dendritic α-Fe phase was formed. Annealing of, the samples resulted in homogenization of the microstructure and change of the phase constitution. The heat treatment resulted in development of almost single-phase of the NaZn_(13)-type structure identified as LaFe_(11.0)Co_(0.8)Si_(1.2) with minor fraction of the α-Fe. The evolution of microstructure and phase constitution was verified by EDX analysis and M?ssbauer spectroscopy.