Effect of Cr and Ni on Phase Formation in a Mechanically Synthesized Nanocomposite Based on Fe75C25

The formation and doping of phases during mechanical synthesis followed by annealing in the (Fe 0.80 Cr 0.05 Ni 0.15 ) 75 C 25 alloy are studied by the method of X-ray diffraction, Mössbauer spectroscopy, and magnetic measurements. It is shown that after mechanical synthesis, the nanocomposite conta...

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Bibliographic Details
Published in:Technical physics 2020-05, Vol.65 (5), p.754-761
Main Authors: Chulkina, A. A., Ulyanov, A. I., Volkov, V. A., Ulyanov, A. L., Zagainov, A. V.
Format: Article
Language:English
Subjects:
Annealing
Austenite
Cementite
Classical and Continuum Physics
Crystallization
Curie temperature
Iron
Magnetic measurement
Mossbauer spectroscopy
Nanocomposites
Nickel
Physical Science of Materials
Physics
Physics and Astronomy
Synthesis
Temperature
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Summary:The formation and doping of phases during mechanical synthesis followed by annealing in the (Fe 0.80 Cr 0.05 Ni 0.15 ) 75 C 25 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) 75 C 25 has a higher stability to temperature variations than mechanically synthesized composite (Fe,Ni) 75 C 25 .
ISSN:1063-7842
1090-6525
DOI:10.1134/S1063784220050072