Abstract
The formation and doping of phases during mechanical synthesis followed by annealing in the (Fe0.80Cr0.05Ni0.15)75C25 alloy are studied by the method of X-ray diffraction, Mossbauer spectroscopy, and magnetic measurements. It is shown that after mechanical synthesis, the nanocomposite contains mainly two phases (amorphous phase and cementite A). During annealing, as a result of crystallization of the amorphous phase, cementite B is formed, in which the nickel concentration is higher than in mechanically synthesized cementite A. Upon an increase in the annealing temperature, austenite with a nonuniform nickel concentration is formed. The Curie temperature of such austenite reaches 500°C. It is established that cementite in mechanically synthesized nanocomposite (Fe,Cr,Ni)75C25 has a higher stability to temperature variations than mechanically synthesized composite (Fe,Ni)75C25.
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