TY - JOUR
T1 - Effects of solution temperature and Cu content on the properties and microstructure of 2:17-type SmCo magnets
AU - Zhang, T. L.
AU - Song, Q.
AU - Wang, H.
AU - Wang, J. M.
AU - Liu, J. H.
AU - Jiang, C. B.
N1 - Publisher Copyright:
© 2017 Elsevier B.V.
PY - 2018/2/25
Y1 - 2018/2/25
N2 - The effects of solution temperature and Cu content on the properties and microstructure of Sm (CobalFe0.21CuxZr0.03)7.6 (x = 0.06, 0.08, 0.10) permanent magnets were investigated systematically. The results showed that TbCu7 single-phase was obtained after solution treatment at optimum temperature. The best magnetic properties of Br = 1.010 T and (BH)max = 190.2 kJ/m3 were obtained for Sm (CobalFe0.21Cu0.08Zr0.03)7.6 by a proper solution treatment at 1478 K. At a lower solution temperature, the Co-rich FeCoZr phase was monitored, and a “step” was observed in the demagnetization curves of aged samples. At a higher solution temperature, composition segregation of the matrix gradually occurs, and a Zr-rich SmCoZr phase was found. However, at a slightly higher solution temperature with superabundant Cu, the precipitated phase remained FeCoZr phase, resulting in a worse remanence. All the above changes were related to the cellular structures.
AB - The effects of solution temperature and Cu content on the properties and microstructure of Sm (CobalFe0.21CuxZr0.03)7.6 (x = 0.06, 0.08, 0.10) permanent magnets were investigated systematically. The results showed that TbCu7 single-phase was obtained after solution treatment at optimum temperature. The best magnetic properties of Br = 1.010 T and (BH)max = 190.2 kJ/m3 were obtained for Sm (CobalFe0.21Cu0.08Zr0.03)7.6 by a proper solution treatment at 1478 K. At a lower solution temperature, the Co-rich FeCoZr phase was monitored, and a “step” was observed in the demagnetization curves of aged samples. At a higher solution temperature, composition segregation of the matrix gradually occurs, and a Zr-rich SmCoZr phase was found. However, at a slightly higher solution temperature with superabundant Cu, the precipitated phase remained FeCoZr phase, resulting in a worse remanence. All the above changes were related to the cellular structures.
KW - Magnetic measurements
KW - Magnetic microstructures
KW - Permanent magnets
KW - Scanning electron microscopy
KW - Transmission electron microscopy
UR - https://www.scopus.com/pages/publications/85036468989
U2 - 10.1016/j.jallcom.2017.11.009
DO - 10.1016/j.jallcom.2017.11.009
M3 - 文章
AN - SCOPUS:85036468989
SN - 0925-8388
VL - 735
SP - 1971
EP - 1976
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
ER -