快淬设备对Nd_2Fe_(14)B/α-Fe合金微结构和磁性能的影响  

Effects of Melt-Spinning Equipments on Microstructure and Magnetic Properties of Nd_2Fe_(14)B/α-Fe Alloys

作　　者：王晨[1] 严密[2] 

机构地区：[1]福州大学材料科学与工程学院,福建福州350108 [2]浙江大学硅材料国家重点实验室,浙江杭州310027

出　　处：《中国稀土学报》2008年第4期476-480,共5页Journal of the Chinese Society of Rare Earths

基　　金：福建省自然科学基金(E071005);福州大学科技发展基金(2007-XY-01);福州大学校人才基金(0626)资助项目

摘　　要：对比分析了感应喷射式熔旋快淬炉和电弧溢流式熔旋快淬炉在制备纳米双相Nd2Fe14B/α-Fe永磁材料方面的差异,研究了不同快淬设备对材料微结构和磁性能的影响。结果表明:采用感应喷射式熔旋快淬炉制备的样品,表面较平整,厚度一致性好;而采用电弧溢流式熔旋快淬炉制备的样品,表面不平整,厚度一致性差。对于相同的配方Nd10Fe79Zr1Co4B6,采用感应喷射式熔旋快淬炉制备的样品磁性能明显高于电弧溢流式熔旋快淬炉。适当增加Zr含量,可以提高合金的非晶形成能力,有效削弱了电弧溢流式熔旋快淬炉冷却速率波动性较大对样品的负面影响,有助于提高磁性能。The differences in the preparation of nano- composite Nd2Fe14B/α-Fe magnets between the induction-melt spurt-spinning equipment and arc-melt over- flow-spinning equipment were discussed, and the effects of melt-spinning equipments on the microstructure and magnetic properties of NdzFe14B/α-Fe magnets were studied. The samples prepared by inductionmelt spurt-spinning equipment had smooth surfaces and uniform thickness. However, the samples prepared by arc-melt overflow-spinning equipment had rough surfaces and the thickness was inhomogeneous.The magnetic properties of samples prepared by induction-melt spurt-spinning equipment were better than those of samples prepared by arc-melt overflow-spinning equipment, even using the same alloy composition of Nd10Fe79Zr1Co4B6. By properly increasing the Zr content, the glass forming ability of alloys was improved, which could lessen the detrimental effect of cooling rate fluctuation, thus enhancing the magnetic properties of samples prepared by arc-meh overflow- spinning equipment.

关 键 词：纳米双相磁体 熔旋快淬 交换耦合 钕铁硼 永磁体 稀土 

分 类 号：TM273[一般工业技术—材料科学与工程] TG146[电气工程—电工理论与新技术]