TY - JOUR
T1 - Magnetic properties and microstructure of melt spun YCo5-xMx ribbons (M = C and Sn; x = 0–0.3)
AU - Chang, H. W.
AU - Ou, W. C.
AU - Lee, Y. I.
AU - Shih, C. W.
AU - Chang, W. C.
AU - Yang, C. C.
AU - Shaw, C. C.
N1 - Publisher Copyright:
© 2018 Elsevier B.V.
PY - 2018/5/30
Y1 - 2018/5/30
N2 - The doping effects of C and Sn on the magnetic properties, structure, and microstructure of melt spun YCo5-xMx (M = C and Sn; x = 0–0.3) ribbons are studied. The permanent magnetic properties of Br = 5.7 kG, iHc = 1.8 kOe, and (BH)max = 2.1 MGOe are obtained for the binary YCo5 ribbon, and they are largely increased to Br = 5.6–5.7 kG, iHc = 7.0–14.7 kOe, (BH)max = 5.3–6.5 MGOe for C-doping ribbons and Br = 5.5–5.6 kG, iHc = 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 YCo4.7Sn0.3 ribbon, Y5Sn3 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 Y5Sn3 precipitates.
AB - The doping effects of C and Sn on the magnetic properties, structure, and microstructure of melt spun YCo5-xMx (M = C and Sn; x = 0–0.3) ribbons are studied. The permanent magnetic properties of Br = 5.7 kG, iHc = 1.8 kOe, and (BH)max = 2.1 MGOe are obtained for the binary YCo5 ribbon, and they are largely increased to Br = 5.6–5.7 kG, iHc = 7.0–14.7 kOe, (BH)max = 5.3–6.5 MGOe for C-doping ribbons and Br = 5.5–5.6 kG, iHc = 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 YCo4.7Sn0.3 ribbon, Y5Sn3 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 Y5Sn3 precipitates.
KW - C and Sn doping effect
KW - Melt spun YCo ribbon
KW - Permanent magnetic materials
UR - http://www.scopus.com/inward/record.url?scp=85042914949&partnerID=8YFLogxK
U2 - 10.1016/j.jallcom.2018.03.023
DO - 10.1016/j.jallcom.2018.03.023
M3 - 期刊論文
AN - SCOPUS:85042914949
SN - 0925-8388
VL - 747
SP - 236
EP - 241
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
ER -