热处理条件对NdFeB纳米复合材料磁性能的影响  

Effect of Heat-treatment on Magnetic Properties of NdFeB Nanocomposite Magnets

作　　者：白岗[1] 答元[1] 刘涛[2] 

机构地区：[1]西安工业大学数理系,西安710032 [2]北京钢铁研究总院功能材料研究所,北京100081

出　　处：《西安工业大学学报》2008年第5期449-451,共3页Journal of Xi’an Technological University

摘　　要：针对NdFeB纳米复合永磁材料的热处理温度和保温时间存在不同的观点,将熔体快淬方法制备的Nd2Fe14B/-αFe纳米复合材料样品在不同温度下进行不同时间的晶化热处理,研究了热处理条件对磁性能的影响.结果表明,Nd2Fe14B/-αFe纳米复合材料的磁性能随热处理条件而变化,较低温度长时间热处理得到的Nd2Fe14B/-αFe纳米复合材料样品的磁性能要比较高温度短时间热处理得到的样品的磁性能稍好一些.其原因是高温短时间热处理时晶粒的生长率较大,容易使晶粒的规则性变差,交换耦合相互作用减弱,硬磁性能降低.Against the different view of heat-treatment of Nd2Fel4 B/α-Fe nanocomposite magnets, the effect of heat-treatment on magnetic properties of melt-quenched Nd2Fe14B/α-Fe nanocomposite magnets is studied. The results show that magnetic properties of Nd2Fe14B/α-Fe nanocomposite magnets changes by heat-treatment, the magnetic properties of samples annealed by low temperature and long time is better than that by high temperature and short time. Because that large growth rate of grains weakens the regularity of gains, and causes the exchange coupling interaction to weaken. As a result hard magnetic performance reduces after the heat-treatment of high temperature and short time.

关 键 词：纳米复合永磁材料 晶化热处理 矫顽力 剩磁 磁能积 

分 类 号：TM273[一般工业技术—材料科学与工程]