| 摘要 |
<P>PROBLEM TO BE SOLVED: To solve the problem that B(boron)-rich nanocomposite magnet whose thin band can be cut to a predetermined length or can be punched out in an arbitrary shape is unstable in magnetism because of small coercive force, and there is no way but forming a bond magnet of arbitrary shape together with resin after disintegration since only thin piece of several millimeters in length is available with a composition of 6-8 atom % of B(boron) quantity near Nd<SB POS="POST">2</SB>TM<SB POS="POST">14</SB>B stoichiometric composition. <P>SOLUTION: A crystallized thin band of coercive force 600 kA/m or larger with a content of thin piece of less than 10 mm in lenth being less than 20% is formed into a composite thin band mixed with resin, which is cut to a predetermined length, bent, or punched out into an arbitrary shape, thereby providing α-Fe/R<SB POS="POST">2</SB>TM<SB POS="POST">14</SB>B system nanocomposite magnet in predetermined shape. Further preferably, a crystallized thin band of average thickness 40-45 μm is used which is available by forming a molten metal alloy paddle of 1300°C or higher in the vertical direction (apex) of Cu roll having a diameter 500 mm or longer which is moved at 14-15 m/sec, and quench-solidifying with roll surface contact distance 10-15 mm, being collected with a flat shooter. <P>COPYRIGHT: (C)2013,JPO&INPIT |
