对名义成分为Nd8Fe73Ti2Zr2B13.6C1.4的合金,采用不同的甩带速度(6,8,10,12,15,18,20,30 m/s)及后续的热处理工艺制备出Nd2Fe14B/α-Fe纳米晶复合永磁带.结果表明:当冷却铜辊表面线速度Vs>12 m/s时,淬态带由非晶相组成.随Vs的减小,淬态样品的析晶峰之间的温度差距增大.退火态薄带的矫顽力随甩带速度降低而提高,6m/s淬态样品经680℃真空热处理10min后得到最大矫顽力Hci=1114 kA/m.随着甩带速度的提高,退火态带的剩磁比(Jr/Js)和磁能积(BH)m皆表现为先增加后降低.最大剩磁比和最佳磁能积都出现在12 m/s淬态样品经780℃退火10 min状态下:Jr/js=0.749;(BH)m=84.6 kJ/m3;Hci=732 kA/m,此样品淬态时为部分非晶.
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