Thermal Stability and Crystallization οf Iron and Cobalt - Based Bulk Amorphous Alloys

• Authors: J. Olszewski , J. Zbroszczyk , K. Sobczyk , W. Ciurzyńska , P. Brągiel , M. Nabiałek , J. Świerczek , M. Hasiak , A. Łukiewska
• Languages of publication: EN

Abstracts

EN

Microstructure by the Mössbauer spectroscopy and approach to magnetic saturation in the bulk amorphous Fe_{61}Co_{10}Me_7Y_2B_{20} (Me_7=Y_7, Y_6Ti_1 or Zr_{2.5}Hf_{2.5}W_2) alloys are investigated. The bulk amorphous Fe_{61}Co_{10}Zr_{2.5}Hf_{2.5}W_2Y_2B_{20} alloy exhibits the best thermal stability and remains amorphous up to 901 K. Moreover, the quasi-dislocations dipoles present in this amorphous alloy have the largest width equal to 6.7 nm. After annealing this alloy below the crystallization temperature the enhancement of both the average hyperfine field and its standard deviation is observed which points to the increase in the atom packing density due to the decay of quasi-dislocation dipoles. After the annealing at 901 K the small amount of the crystalline α-FeCo phase is presented in this alloy. The same crystalline phase appears in the bulk Fe_{61}Co_{10}Y_8Ti_1B_{20} and Fe_{61}Co_{10}Y_9B_{20} alloys after annealing at 750 K and 840 K, respectively.

Keywords

EN

75.50.Kj; 75.50.Bb; 76.80.+y

Discipline

• 76.80.+y: Mössbauer effect; other γ-ray spectroscopy(see also 33.45.+x Mössbauer spectra—in atomic and molecular physics; for biophysical applications, see 87.64.kx; for chemical analysis applications, see 82.80.Ej)
• 75.50.Kj: Amorphous and quasicrystalline magnetic materials
• 75.50.Bb: Fe and its alloys

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2008
• Volume: 114
• Issue: 6
• Pages: 1659-1666

Dates

published

2008-12

Contributors

author

J. Olszewski

• Institute of Physics, Częstochowa University of Technology, al. Armii Krajowej 19, 42-200 Częstochowa, Poland

author

J. Zbroszczyk

• Institute of Physics, Częstochowa University of Technology, al. Armii Krajowej 19, 42-200 Częstochowa, Poland

author

K. Sobczyk

• Institute of Physics, Częstochowa University of Technology, al. Armii Krajowej 19, 42-200 Częstochowa, Poland

author

W. Ciurzyńska

• Institute of Physics, Częstochowa University of Technology, al. Armii Krajowej 19, 42-200 Częstochowa, Poland

author

P. Brągiel

• Institute of Physics, Jan Długosz University, al. Armii Krajowej 15, 42-200 Częstochowa, Poland

author

M. Nabiałek

• Institute of Physics, Częstochowa University of Technology, al. Armii Krajowej 19, 42-200 Częstochowa, Poland

author

J. Świerczek

• Institute of Physics, Częstochowa University of Technology, al. Armii Krajowej 19, 42-200 Częstochowa, Poland

author

M. Hasiak

• Institute of Materials Science and Applied Mechanics, Wrocław University of Technology, Smoluchowskiego 25, 50-370 Wrocław, Poland

author

A. Łukiewska

• Institute of Physics, Częstochowa University of Technology, al. Armii Krajowej 19, 42-200 Częstochowa, Poland

References

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Identifiers

DOI

10.12693/APhysPolA.114.1659