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机构地区:[1]College of Material Science & Engineering, Sichuan University [2]College of Material Science & Engineering, Xihua University, Chengdu 610039, China [3]College of Material Science & Engineering, Sichuan University, Chengdu 610065, China
出 处:《Journal of Rare Earths》2004年第6期808-811,共4页稀土学报(英文版)
基 金:Projectsupportedby 863Project(2 0 0 1AA3 2 40 3 0 )
摘 要:The influence of Pr on thermal stability, microstructure, and magnetic properties of melt-spun (Nd1-xPrx)(10.5)(FeCoZr)(83.5)B-6(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, H-ci increases, but B-r 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 similar to 0.8. Substitution of Pr for Nd causes the crystallization temperature and crystallization energy to decrease. This thermal stability difference results in that (Nd0.8Pr0.8)(10.5)(FeCoZr)(83.5)B-6 alloy has a rougher and more inhomogeneous microstructure than that of (Nd(0.8)Pro(0.2))(10.5)(FeCoZr)(83.5)B-6 alloy, furthermore, leads to the decrease of B-r with the increase of Pr content.The influence of Pr on thermal stability, microstructure, and magnetic properties of melt-spun (Nd1-xPrx)(10.5)(FeCoZr)(83.5)B-6(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, H-ci increases, but B-r 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 similar to 0.8. Substitution of Pr for Nd causes the crystallization temperature and crystallization energy to decrease. This thermal stability difference results in that (Nd0.8Pr0.8)(10.5)(FeCoZr)(83.5)B-6 alloy has a rougher and more inhomogeneous microstructure than that of (Nd(0.8)Pro(0.2))(10.5)(FeCoZr)(83.5)B-6 alloy, furthermore, leads to the decrease of B-r with the increase of Pr content.
关 键 词:metal materials permanent magnets Pr content thermal stability magnetic properties MICROSTRUCTURE rare earths
分 类 号:TM273[一般工业技术—材料科学与工程]
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