Effect of annealing process on magnetic properties of Sm(Co0.6Fe0.27Cu0.1Zr0.03)7.5 ribbons
来源期刊：JOURNAL OF RARE EARTHS2009年第1期
论文作者：XUE Gang PENG Long ZHANG Huaiwu
Key words：rare earth permanent magnets; SmCo alloys; melt-spun; anneal; magnetic properties;
Abstract: Sm(Co0.6Fe0.27Cu0.1Zr0.03)7.5 ribbons were prepared by melt-spun method. The results showed that the remnant magnetization Mr and intrinsic coercivity Hci had a rapid increase when the heating rate increased from 5 to 10℃/min. But the increase of Mr and Hci were observed to be very little when the heating rate was further increased to 20℃/min. 10℃/min was the critical heating rate for obtaining high magnetic properties. The maximum values of Mr and Hci reached 0.70 T and 780.1 kA/m when the annealing temperature and annealing time were optimized to be 800℃ and 1 h, respectively. Proper second-step heat treatment could suppress the decrease of Hci when the cooling rate increased from 0.7 to 5 ℃/min, which could reduce the cooling time effectively.
XUE Gang1，PENG Long1，ZHANG Huaiwu1
(1.State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, China)
Abstract:Sm(Co0.6Fe0.27Cu0.1Zr0.03)7.5 ribbons were prepared by melt-spun method. The results showed that the remnant magnetization Mr and intrinsic coercivity Hci had a rapid increase when the heating rate increased from 5 to 10℃/min. But the increase of Mr and Hci were observed to be very little when the heating rate was further increased to 20℃/min. 10℃/min was the critical heating rate for obtaining high magnetic properties. The maximum values of Mr and Hci reached 0.70 T and 780.1 kA/m when the annealing temperature and annealing time were optimized to be 800℃ and 1 h, respectively. Proper second-step heat treatment could suppress the decrease of Hci when the cooling rate increased from 0.7 to 5 ℃/min, which could reduce the cooling time effectively.
Key words:rare earth permanent magnets; SmCo alloys; melt-spun; anneal; magnetic properties;
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