1. Magnetic properties and microstructure of melt spun YCo5-xMx ribbons (M = C and Sn; x = 0–0.3).
- Author
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Chang, H.W., Ou, W.C., Lee, Y.I., Shih, C.W., Chang, W.C., Yang, C.C., and Shaw, C.C.
- Subjects
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TIN , *CARBON , *MAGNETIC properties , *MAGNETIC structure , *MICROSTRUCTURE , *MELTING - Abstract
The doping effects of C and Sn on the magnetic properties, structure, and microstructure of melt spun YCo 5-x M x (M = C and Sn; x = 0–0.3) ribbons are studied. The permanent magnetic properties of B r = 5.7 kG, i H c = 1.8 kOe, and (BH) max = 2.1 MGOe are obtained for the binary YCo 5 ribbon, and they are largely increased to B r = 5.6–5.7 kG, i H c = 7.0–14.7 kOe, (BH) max = 5.3–6.5 MGOe for C-doping ribbons and B r = 5.5–5.6 kG, i H c = 5.2–14.4 kOe, (BH) max = 3.8–6.2 MGOe for Sn-doping ribbons, respectively. All studied ribbons mainly consist of hexagonal 1:5 phase with space group of P6/mmm. The entrance of C or Sn into the crystal structure of 1:5 phase modifies lattice constants and increases Curie temperature. The microstructure is effectively refined from 100 to 300 nm for binary ribbons to 10–50 nm for C-doping and 60–100 nm for Sn-doping ribbons, respectively. For high Sn-content YCo 4.7 Sn 0.3 ribbon, Y 5 Sn 3 precipitates with 10–20 nm in diameter form in the matrix, and these nonmagnetic phase may act as a pinning site to impede magnetization reversal and thus contribute to enhance coercivity. Magnetic property enhancement with C-doping is attributed to the formation of Y(Co, C) 5 phase and microstructure refinement, while one with Sn-doping is related to the formation of Y(Co, Sn) 5 phase, microstructure refinement, and the induction of nonmagnetic Y 5 Sn 3 precipitates. [ABSTRACT FROM AUTHOR]
- Published
- 2018
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