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Study of the mechanical and magnetic properties of Fe₆₁Co₁₀Zr_5-xHf_xW₂Y₂B₂₀ (x = 0, 3) bulk amorphous and crystalline alloys

Marcin G. Nabiałek ², Marcin J. Dospial ², Michał Szota ¹

1. Częstochowa University of Technology, Institute of Materials Ingineering, Armii Krajowej 19, Częstochowa 42-200, Poland
2. Institute of Physics, Częstochowa University of Technology, Al. Armii Krajowej 19, Częstochowa 42-200, Poland

Abstract

Bulk amorphous alloys are group of materials with large number of better properties then their crystalline equivalents (like mechanical, environmental etc.). In addition some of these alloys display good soft magnetic properties and high Curie temperature what make them perfect materials for parts of engines and transformers working in bad environmental conditions.

In this work the mechanical and magnetic properties of Fe₆₁Co₁₀Zr_2+xHf_3-xW₂Y₂B₂₀ (x = 0, 3) bulk amorphous and crystalline alloys were investigated. The crystalline materials were smelted on copper mould using electric arc, their amorphous equivalents were prepared using induction suction method. All investigated samples had shape of 10/10mm length and 0,5mm thickness plates. The density of the samples were derived using Archimedes law by dipping method. The study of the microstructure were performed using X-ray diffraction and mössbauer spectroscopy. The X-ray diffraction were made using cobalt source with moderate wave length 1,79021 Å. The Mössbauer spectra were recorded using the conventional constant-acceleration spectrometer with the ⁵⁷Co of g-ray source in a rhodium matrix. The spectrometer was calibrated by means of Fe foil. The microstructure measurements proved that samples made by induction suction method have amorphous and arc smelted crystalline structure.

The magnetic measurements were performed using LakeShore VSM, with maximum magnetic field up to 2T. From the analysis of static hysteresis loops it was found that Fe₆₅ Fe₆₁Co₁₀Zr_2+xHf_3-xW₂Y₂B₂₀ (x = 0, 3) amorphous alloy have better soft magnetic properties then their crystalline equivalents.

The mechanical properties of all investigated samples were obtained using micro hardness system FutureTech 710 with 0,2 kG load and wear resistance measurement system “Kulotester” using 20mm balls made from stainless steel. It was shown that amorphous alloys have higher density, micro hardness and better wear resistance.

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Study of the mechanical and magnetic properties of Fe61Co10Zr5-xHfxW2Y2B20 (x = 0, 3) bulk amorphous and crystalline alloys

Presentation: Poster at E-MRS Fall Meeting 2009, Symposium H, by Michał Szota See On-line Journal of E-MRS Fall Meeting 2009 Submitted: 2009-06-15 03:12 Revised: 2009-06-15 03:13

Study of the mechanical and magnetic properties of Fe₆₁Co₁₀Zr_5-xHf_xW₂Y₂B₂₀ (x = 0, 3) bulk amorphous and crystalline alloys

Presentation: Poster at E-MRS Fall Meeting 2009, Symposium H, by Michał Szota
See On-line Journal of E-MRS Fall Meeting 2009

Submitted: 2009-06-15 03:12 Revised: 2009-06-15 03:13