| 摘要 |
PROBLEM TO BE SOLVED: To provide a magnet which has superior magnetic characteristics, and high reliability, and especially thermally stable. SOLUTION: This belt magnet material (quench thin belt 8) is formed by a method, in which the melt 6 of alloy containing rare earth element, transition metal, and B is jetted out from a nozzle 3 to impinge against the circumferential surface 53 of a cooling roll 5, so as to be quenched. The constitutional structure of the belt magnet material is a composite structure composed of a R2TM14B phase (where R denotes, at least, a kind of rare earth element and TM is transition metal containing Fe as the main component) and an α-Fe phase of bcc structure. Concerning the diffraction profiles of the roll surface 81 and free surface 82 of the quench thin belt 8 obtained through X-ray diffraction experiments, provided that the diffraction intensity of the R2TM14B phase of the roll surface 81 on a (410) plane and the diffraction intensity of the α-Fe phase of the roll surface 81 on a (110) plane are represented by I1h and I1s, respectively, and the diffraction intensity of the R2TM14B phase of the free surface 82 on the (410) plane and the diffraction intensity of the α-Fe phase of the free surface 82 on the (110) plane are represented by I2h and I2s respectively, then I1h, I1s and I2h, I2s are so set as to satisfy the equation [1], (I1h/I1s)/(I2h/I2s)<=5. |
