【摘要】 采用直接快淬法制备了Nd_9.5Fe₈₄B_6.5合金,研究了腔室压力和甩带速度对其磁性能和微观结构的影响,建立了两者之间的关联性。研究发现:熔体快淬过程中在其它条件保持不变时,腔室压力和甩带速度之间存在着互相补偿的关系。腔室压力为0.03 MPa、快淬速度为19 m/s时制备的条带样品与腔室压力为0.05 MPa、快淬速度为15 m/s时制备的样品厚度和磁性能的数值相近。X射线衍射和透射电子显微镜分析结果表明:这2种条件下得到的条带样品具有相同的相组成和相似的微观结构。因此,通过调整腔室压力和甩带速度可以得到微观结构和磁性能相近的条带样品。更多还原

【Abstract】 The Nd_9.5Fe₈₄B_6.5 ribbons were prepared by melt-spinning.The effects of chamber pressure and wheel speed on the magnetic property and microstructure of Nd_9.5Fe₈₄B_6.5 alloy were investigated.A complementary relationship between the chamber pressure and the wheel speed in rapid solidification of melt-spinning was proposed.The values of thickness and magnetic property in the ribbon sample prepared at a chamber pressure of 0.03 MPa and a wheel speed of 19 m/s are similar to those prepared at a chamber pressure of 0.05 MPa and a wheel speed of 15 m/s.XRD and TEM results show that the ribbons prepared under the two conditions have the same phase composition and similar microstructure.The melt-spun Nd_9.5Fe₈₄B_6.5 ribbons with similar magnetic properties and microstructure can be obtained by controlling the chamber pressure and wheel speed in rapid solidification.更多还原