Title of article
Magnetic Characteristics of Nanocrystalline Co78Zr17B2Si1W2 Alloy Formed by Melt Spinning and Subsequent Annealing
Author/Authors
Molaahmadi ، Mohammad Department of Materials Engineering - Malek- Ashtar University of Technology , Tavoosi ، Majid Department of Materials Engineering - Malek-Ashtar University of Technology , Ghasemi ، Ali Department of Materials Engineering - Malek- Ashtar University of Technology , Gordani ، Gholam Reza Department of Materials Engineering - Malek- Ashtar University of Technology
From page
66
To page
71
Abstract
Investigation the structural and magnetic properties of nanocrystalline Co78Zr17B2Si1W2 alloy during melt spinning and annealing processes were the main goal of this study. In this regard, samples were prepared using vacuum induction melting, melt spinning and subsequent annealing. The specimens were evaluated using X-ray diffraction (XRD), field emission scanning electron microscope (FESEM), differential scanning calorimetry (DSC) and vibrating sample magnetometer (VSM). Based on results, nanocrystalline Co5Zr single phase with hard magnetic properties (Ms=29.5 emu/g and Hc=2.7 kOe) successfully formed during melt spinning process (at wheel speed of 40 m.s-1). The coercivity value of rapid solidified sample increased to about 3.2 kOe during annealing process up to 400°C. However, more increasing in annealing temperature lead to the transformation of non-equilibrium magnetic Co5Zr phase to stable Zr2Co11 phase, which has distractive effects on final magnetic properties.
Keywords
Co , Zr alloy , Nanocrystalline , Melt , spinning , Magnetic properties
Journal title
Iranian Journal of Materials Science and Engineering
Journal title
Iranian Journal of Materials Science and Engineering
Record number
2751694
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