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, Mössbauer 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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Funding
This study was performed under State assignment (State registration no. NIR AAAA-A17-117022250038-7) and was supported in part by the Program of Fundamental Research of the Ural Branch, Russian Academy of Sciences (project no. 18-10-2-21).
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Translated by N. Wadhwa
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Chulkina, A.A., Ulyanov, A.I., Volkov, V.A. et al. Effect of Cr and Ni on Phase Formation in a Mechanically Synthesized Nanocomposite Based on Fe75C25. Tech. Phys. 65, 754–761 (2020). https://doi.org/10.1134/S1063784220050072
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DOI: https://doi.org/10.1134/S1063784220050072