Temperature investigations of magnetic properties when analyzing the structural phase state of a model nanocomposite with carbidosteel composition

The phase composition, magnetic state of the phases and their influence on formation hysteresis properties nanocomposite with (Fe 0.85 Mn 0.10 Ni 0.05 ) 83 C 17 composition after mechanosynthesis subsequent annealing have been studied. It is shown that, although dependences coercive force temperature H_c(T ann alloy, measured at room liquid nitrogen temperatures, are curves maxima, H c driven by different mechanisms. At measurements, maximum value composite obtained when size ferrite precipitates approaches to critical single-domain state, whereas low caused change cementite structural upon annealing. Keywords: Nanocrystalline Fe-C-Mn-Ni alloys, mechanical alloying, heat treatment, X-Ray diffraction, force, susceptibility, Curie temperature, Mossbauer spectroscopy.