Magnetic Properties of Nanocrystalline Two-Phase Permanent Magnetic Alloys by Crystallizing from Amorphous State
Zhang Mingang1, Jin Zhihao1, Guo Dongcheng2
(1. Xi'an Jiaotong University,Xi'an 710049,China;2. Taiyuan Heavy Machinery Institute)
Magnetic Properties of Nanocrystalline Two-Phase Permanent
Magnetic Alloys by Crystallizing from Amorphous State
Zhang Mingang1, Jin Zhihao1, Guo Dongcheng2
(1. Xi'an Jiaotong University,Xi'an 710049,China;2. Taiyuan Heavy Machinery Institute)
Abstract: Nanocrystalline
Nd2Fe14B/aFe two-phase magnets with two different compositions are prepared by crystallizing
the amorphous melt-spun ribbons using melt spinning and
annealing. The effects of adding Dy+Ga and annealing conditions on the magnetic properties
of alloys have been investigated. The results show that the crystallization process of
ternary Nd8.5Fe86B5.5 alloy consisted of three steps, but Nd7.5Dy1Fe85B4.5Ga2 alloy with adding Dy+Ga only consisted of two steps. Comparing with the
ternary alloy, adding Dy+Ga can change the forming temperature ofa Fe and Nd2Fe14B phases, reduce the size of grains
of the two phases and obviously increase the magnetic properties of alloys.
Keywords: nanocrystalline two-phase magnet; crystallization from amorphous; melt-spun;
magnetic propertiy