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在钼辊表面线速度±=35m/s条件下制备SmCo5和FeCo快淬薄带,对70(SmC05)/30(FeCo)%(质量分数)的薄带混合物进行15~240min的短时闻机械研磨实验,研究了该过程中研磨磁粉的微观组织演化和磁性能变化.XRD分析表明,机械研磨后的磁粉由SmCo5与α-(Fe,Co)两相构成;经过15min研磨后,SmCo5达到约6.5nm,而α-(Fe,Co)达到约23.9nm,而经过120min研磨的磁粉中两相的尺寸都<10nm.VSM分析表明,经过60min机械研磨的磁粉的磁滞回线已呈现单一硬磁性相磁化的特征;在15~240min的机械研磨时间范围内,磁粉的饱和磁化强度随研磨时间延长而不断增大,从研磨15min的0.92T到研磨240min后达到1.3T,而磁粉的剩磁和矫顽力都在研磨90min时达到极大值,分别为0.32T和9.6×104A/m.

参考文献

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