Mössbauer investigations of amorphous Fe_[80-x]B₂₀Nb_x (x=0,4,6,10) alloys

• Autorzy: Babilas R. , Nowosielski R. , Kądziołka-Gaweł M. , Zajączkowski A.
• Języki publikacji: EN

Abstrakty

EN

Purpose: The paper presents a structural and magnetic characterization of selected Fe-based metallic glasses in as-cast state. Design/methodology/approach: The studies were performed on Fe_(80-x)B₂₀Nb_x metallic glasses in form of ribbons with Nb addition of 0, 4, 6, 10 at.%. The amorphous structure of tested samples was examined by X-ray diffraction (XRD) and Mossbauer spectroscopy methods. The Mossbauer spectroscopy was also applied to comparison of structure in studied amorphous samples with different chemical composition. The thermal properties associated with solidus temperature of master alloys were measured using the differential thermal analysis (DTA). The soft magnetic properties examination of tested materials contained relative magnetic permeability. Finding: The XRD and Mossbauer spectroscopy investigations revealed that the studied alloys in as-cast state were amorphous. The solidus temperature assumed as the onset temperature of the melting peak on the DTA curve reached a value of 1405, 1394, 1392 and 1389 K for Fe₈₀B₂₀, Fe₇₆B₂₀Nb₄, Fe₇₄B₂₀, Nb₆, and Fe₇₀B₂₀, Nb₁₀ alloy, adequately. The Mossbauer spectra presented broadened six line patterns characteristic to the structural disorder of amorphous ferromagnetic materials. The changing of the average hyperfine magnetic field with niobium addition is connected with structural changing. A high concentration of Nb atoms with high atomic radius can acting as diffusion barrier what lead to formation of regions rich in iron or boron atoms. The niobium addition in Fe_[80-x]B₂₀Nb_x alloy improves soft magnetic properties in as-cast state. Practical implications: The Mössbauer spectroscopy is very useful method in studying the structural environment of Fe atoms on a nearest-neighbor length scale allowing the analysis of iron-containing phases. Originality/value: The obtained examination results confirm the utility of investigation methods in analysis of microstructure of ferromagnetic glassy alloys.

Słowa kluczowe

EN

amorphous materials; Fe-based metallic glasses; Mössbauer spectroscopy; thermal analysis

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2012
• Tom: Vol. 50, nr 2
• Strony: 66--73
• Opis fizyczny: Bibliogr. 35 poz., rys., tab.

Twórcy

autor

Babilas R.

• Institute of Engineering Materials and Biomaterials, Silesian University of Technology, ul. Konarskiego 18a, 44-100 Gliwice, Poland

autor

Nowosielski R.

• Institute of Engineering Materials and Biomaterials, Silesian University of Technology, ul. Konarskiego 18a, 44-100 Gliwice, Poland

autor

Kądziołka-Gaweł M.

• Institute of Physics, University of Silesia, ul. Uniwersytecka 4, 40-007 Katowice, Poland

autor

Zajączkowski A.

• Institute of Non-Ferrous Metals, ul. Sowińskiego 5, 44-100 Gliwice, Poland

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