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Influence of Crystallization on Magnetic Properties in Co66Fe4Mo2Si16B12 Amorphous Alloy |
| HE Shu-li;HE Kai-yuan;WANG Zhi;CHENG Li-zhi;FU Yu-jun |
| Department of Materials Science and Engineering, Northeastern University, Shenyang 110006 |
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| Cite this article: |
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HE Shu-li, HE Kai-yuan, WANG Zhi et al 1997 Chin. Phys. Lett. 14 464-467 |
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Abstract The annealing effects on the magnetic properties and structures of Co66Fe4Mo2Si16B12 amorphous alloy were studied by means of ballistic method and x-ray diffraction technique respectively. During the isothermal annealing at Ta = 460°C, the initial permeability μi of the sample increased at first, then decreased with the annealing time ta and exhibited a maximum at about ta = 45 min. Meanwhile, it was found that magnetostriction λs changed with ta and ran through zero at about ta = 45min. The x-ray diffraction results showed that the sample was still in an amorphous state in the whole 460°C isothermal annealing process ( ta = 0-120min). After the annealing temperature increased to 480°C, α-Fe(Co,Si) phase began to precipitate, then, Co3Mo crystallites and other phases were formed subsequently at 500°C. The results of magnetic measurement indicated that the formation of any crystalline phases should lead to the deterioration of magnetic properties.
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| Keywords:
75.50.Kj
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Published: 01 June 1997
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| PACS: |
75.50.Kj
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(Amorphous and quasicrystalline magnetic materials)
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