TY - JOUR
T1 - Hard magnetic property improvement of melt-spun PrCo5 ribbons by Fe and C Doping
AU - Chang, H. W.
AU - Wang, H. Y.
AU - Lee, Y. I.
AU - Shih, C. W.
AU - Chang, W. C.
AU - Yang, C. C.
AU - Shaw, C. C.
N1 - Publisher Copyright:
© 1965-2012 IEEE.
PY - 2018/11
Y1 - 2018/11
N2 - Magnetic properties and microstructure of melt-spun PrCo5-x-yFexCy (x = 0 and 0.3; y = 0-0.3) ribbons are studied. For PrCo5 ribbons spun at lower wheel speed of 20 m/s, the coexistence of 2:17 phase with magnetic hard 1:5 phase leads to low coercivity of 0.6 kOe. Increasing wheel speed to 40 m/s imroves the coercivity to 3.3 kOe due to the increased volume fraction of 1:5 phase. Interestingly, magnetic properties of PrCo5 ribbons melt spun at 40 m/s (Br = 6.4 kG, iHc = 3.3 kOe, and (BH)max = 4.5 MGOe) are improved to Br = 6.1-6.5 kG, iHc = 7.8-13.5 kOe, (BH)max = 7.3-8.9 MGOe by doping C, and significantly enhanced to Br = 6.3 kG, iHc = 16.1 kOe, and (BH)max = 9.3 MGOe for C and Fe co-doped PrCo4.6Fe0.3C0.1 ribbons. The structural and thermo-magnetic analysis confirms that the entrance of Fe and part of C into the crystal structure of 1:5 phase leads to the increase of Curie temperature. Doping proper C content not only uniformly refines grain size and, therefore, improves the squareness of demagnetization curve and (BH)max, but also increases the volume fraction of 1:5 phase, and thus enhances the coercivity. The increased volume fraction of 1:5 phase and the reduced magnetic domain size due to refined microstructure by co-doping Fe and C make PrCo4.6Fe0.3C0.1 ribbons exhibit a high permanent magnetic performance. They are promising candidate materials for making bonded magnets.
AB - Magnetic properties and microstructure of melt-spun PrCo5-x-yFexCy (x = 0 and 0.3; y = 0-0.3) ribbons are studied. For PrCo5 ribbons spun at lower wheel speed of 20 m/s, the coexistence of 2:17 phase with magnetic hard 1:5 phase leads to low coercivity of 0.6 kOe. Increasing wheel speed to 40 m/s imroves the coercivity to 3.3 kOe due to the increased volume fraction of 1:5 phase. Interestingly, magnetic properties of PrCo5 ribbons melt spun at 40 m/s (Br = 6.4 kG, iHc = 3.3 kOe, and (BH)max = 4.5 MGOe) are improved to Br = 6.1-6.5 kG, iHc = 7.8-13.5 kOe, (BH)max = 7.3-8.9 MGOe by doping C, and significantly enhanced to Br = 6.3 kG, iHc = 16.1 kOe, and (BH)max = 9.3 MGOe for C and Fe co-doped PrCo4.6Fe0.3C0.1 ribbons. The structural and thermo-magnetic analysis confirms that the entrance of Fe and part of C into the crystal structure of 1:5 phase leads to the increase of Curie temperature. Doping proper C content not only uniformly refines grain size and, therefore, improves the squareness of demagnetization curve and (BH)max, but also increases the volume fraction of 1:5 phase, and thus enhances the coercivity. The increased volume fraction of 1:5 phase and the reduced magnetic domain size due to refined microstructure by co-doping Fe and C make PrCo4.6Fe0.3C0.1 ribbons exhibit a high permanent magnetic performance. They are promising candidate materials for making bonded magnets.
KW - Fe and C doping effect
KW - melt-spun PrCo ribbon
KW - permanent magnetic materials
UR - http://www.scopus.com/inward/record.url?scp=85048609209&partnerID=8YFLogxK
U2 - 10.1109/TMAG.2018.2840478
DO - 10.1109/TMAG.2018.2840478
M3 - 期刊論文
AN - SCOPUS:85048609209
SN - 0018-9464
VL - 54
JO - IEEE Transactions on Magnetics
JF - IEEE Transactions on Magnetics
IS - 11
M1 - 8386788
ER -