快淬速度对Nd2Fe14B/α-Fe纳米复合永磁材料结构和磁性能的影响  

Effects of melt-spinning speed on microstructure and magnetic properties of Nd_2Fe_(14)B/α-Fe nanocomposite magnets

作　　者：王占勇[1] 周邦新[2] 倪健森[2] 徐晖[2] 王现英[1] 金鸣林[1] 房永征[1] 

机构地区：[1]上海应用技术学院材料工程系,上海200235 [2]上海大学材料所,上海200072

出　　处：《金属热处理》2008年第6期28-31,共4页Heat Treatment of Metals

基　　金：国家“863”高技术研究发展计划(2002AA302602-2);上海市重点学科建设资助项目(P1502);上海应用技术学院引进人才项目(YJ2006-16)

摘　　要：利用熔体快淬法制备了(Nd0·9Dy0·1)9(Fe0·9Co0·1)85·5B5·5快淬薄带,研究了快淬速度对晶化过程、晶化后薄带的结构及磁性能的影响。研究发现,快淬速度不同,薄带的非晶程度不同,晶化过程存在很大差异;在快淬速度为12m/s时,快淬薄带中已存在一定的晶态相,晶化后的晶粒细小均匀,磁性能较高;而当快淬速度达到18m/s和25m/s时,合金晶化后的晶粒粗大且不均匀,磁性能较低。Nd2Fe14B/α-Fe nanocomposite magnets were prepared by melt spinning method with different melt-spinning speed. The results show that the meh-spinning speed has great effects on microstructure and magnetic properties of Nd2 Fe14B/α-Fe nanocomposite magnets. There are great differences in amorphous level and crystallization procedure for asspun ribbons with different melt-spinning speed. Ultra-fine crystal phases exist for as-spun ribbons with melt-spinning speed of 12m/s, inducing fine and homogeneous microstructure and high magnetic properties after crystallization. But lower magnetic properties are obtained for the ribbons with melt-spinning speed of 18 m/s and 25 m/s due to coarse and non-homogeneous microstructure.

关 键 词：ND2FE14B/Α-FE 双相纳米复合永磁材料 快淬速度 磁性能 

分 类 号：TM273[一般工业技术—材料科学与工程]