Thermal Stability and Hyperfine Interactions of Mechanically Synthesized Co₄₀Fe₄₀Ni₂₀ Alloy

摘要

Mechanical alloying method was used to obtain Co₄₀Fe₄₀Ni₂₀ alloy from the elemental powders. X-ray diffraction studies revealed that the final product of milling was the solid solution with b.c.c. lattice and the average grain size of about 36 nm. After heating of the alloy up to 993 K the mixture of two solid solutions with b.c.c. and f.c.c. lattices with small amount of the third iron-oxide phase was formed. Annealing of the alloy at 1173K during 1 h resulted in the formation of the solid solution with f.c.c. lattice. Mossbauer spectroscopy allowed to determine the hyperfine interactions parameters of the obtained phases. Results of the macroscopic magnetic measurements testified that Co₄₀Fe₄₀Ni₂₀ alloy had relatively good soft magnetic properties.