Magnetic Characteristics of Nanocrystalline Co78Zr17B2Si1W2 Alloy Formed by Melt Spinning and Subsequent Annealing

Molaahmadi, Mohammad; Tavoosi, Majid; Ghasemi, Ali; Gordani, Gholam Reza

doi:10.22068/ijmse.3119

Volume 20, Issue 2 (June 2023) IJMSE 2023, 20(2): 1-6 | Back to browse issues page

‎ 10.22068/ijmse.3119

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Molaahmadi M, Tavoosi M, Ghasemi A, Gordani G R. Magnetic Characteristics of Nanocrystalline Co78Zr17B2Si1W2 Alloy Formed by Melt Spinning and Subsequent Annealing. IJMSE 2023; 20 (2) :1-6
URL: http://ijmse.iust.ac.ir/article-1-3119-en.html

Magnetic Characteristics of Nanocrystalline Co78Zr17B2Si1W2 Alloy Formed by Melt Spinning and Subsequent Annealing

Mohammad Molaahmadi

, Majid Tavoosi

, Ali Ghasemi

, Gholam Reza Gordani

Abstract: (7669 Views)

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 Zr₂Co₁₁phase, which has distractive effects on final magnetic properties.

Keywords: Co-Zr alloy, Nanocrystalline, Melt-spinning, Magnetic properties