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http://140.128.103.80:8080/handle/310901/24767
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| Title: | Magnetic properties enhancement of melt spun CoZrB ribbons by elemental substitutions |
| Authors: | Chang, H.W.;Tsai, C.F.;Hsieh, C.C.;Shih, C.W.;Chang, W.C.;Shaw, C.C. |
| Contributors: | Department of Applied Physics, Tunghai University |
| Keywords: | Co5Zr nanocomposite;Elemental substitution;Melt spinning |
| Date: | 2013 |
| Issue Date: | 2014-05-30T02:25:22Z (UTC)
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| Abstract: | Effect of elemental substitution of M (M=C, Cu, Ga, Al and Si) for Zr on the magnetic properties, phase evolution, and microstructure of melt spun Co80Zr18-xMxB2 (x=0-2) ribbons have been investigated. The x-ray diffraction (XRD) and thermal magnetic analysis (TMA) results showed that two magnetically soft phases, namely fcc-Co and Co23Zr6, coexisted with hard phase Co5Zr in Co80Zr17M1B2 ribbons with M=Cu, Ga, Al and Si, while an extra unknown magnetic phase was present in ribbons with M=C. The ribbons with M=C and Si were found to improve the remanence (σr) of the Co80Zr17M1B 2 ribbons. However, only M=Si could improve the whole magnetic properties, including Br, intrinsic coercivity (iH c) and energy product ((BH)max) of the above ribbons. The optimal magnetic properties of Br=5.2 kG, iH c=4.5 kOe, and (BH)max=5.3 MGOe were obtained in Co 80Zr17Si1B2 ribbons, which possessed Co5Zr and minor fcc-Co phases with much finer grain size (10-30 nm) in comparison with its counterpart Co80Zr18B2 (20-60 nm). ? 2013 Elsevier B.V. |
| Relation: | Journal of Magnetism and Magnetic Materials,Vol.346,P.74-77 |
| Appears in Collections: | [應用物理學系所] 期刊論文
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