Influence of Pr on Magnetic Properties and Microstructure of Melt-Spun (Nd1-xPrx)10.5(FeCoZr)83.5B6 Alloy
来源期刊：JOURNAL OF RARE EARTHS2004年第6期
论文作者：查五生 涂铭旌 高升吉 刘颖
Key words：metal materials; permanent magnets; Pr content; thermal stability; magnetic properties; microstructure; rare earths;
Abstract: The influence of Pr on thermal stability, microstructure, and magnetic properties of melt-spun(Nd1-xPrx)10.5(FeCoZr)83.5B6(x=0,0.2,0.4,0.6,0.8,1.0)alloy was investigated. By sub-overquenching to get the mixture of amorphous and fine crystallites and post annealing under the optimum conditions,bonded magnets with the best magnetic properties were prepared. With the increase of Pr content, Hci increases, but Br decreases.(BH)max of magnets bonded with 3.25%(mass fraction)epoxy reaches the maximum of 70.6 kJ·m-3 at x=0.6～0.8. Substitution of Pr for Nd causes the crystallization temperature and crystallization energy to decrease. This thermal stability difference results in that(Nd0.2Pr0.8)10.5(FeCoZr)83.5B6 alloy has a rougher and more inhomogeneous microstructure than that of(Nd0.8Pr0.2)10.5(FeCoZr)83.5B6 alloy, furthermore, leads to the decrease of Br with the increase of Pr content.
查五生1，涂铭旌1，高升吉1，刘颖1
(1.College of Material Science & Engineering, Sichuan University, Chengdu 610065, China;
2.College of Material Science & Engineering, Xihua University, Chengdu 610039, China)
Abstract:The influence of Pr on thermal stability, microstructure, and magnetic properties of melt-spun(Nd1-xPrx)10.5(FeCoZr)83.5B6(x=0,0.2,0.4,0.6,0.8,1.0)alloy was investigated. By sub-overquenching to get the mixture of amorphous and fine crystallites and post annealing under the optimum conditions,bonded magnets with the best magnetic properties were prepared. With the increase of Pr content, Hci increases, but Br decreases.(BH)max of magnets bonded with 3.25%(mass fraction)epoxy reaches the maximum of 70.6 kJ·m-3 at x=0.6～0.8. Substitution of Pr for Nd causes the crystallization temperature and crystallization energy to decrease. This thermal stability difference results in that(Nd0.2Pr0.8)10.5(FeCoZr)83.5B6 alloy has a rougher and more inhomogeneous microstructure than that of(Nd0.8Pr0.2)10.5(FeCoZr)83.5B6 alloy, furthermore, leads to the decrease of Br with the increase of Pr content.
Key words:metal materials; permanent magnets; Pr content; thermal stability; magnetic properties; microstructure; rare earths;
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