流动温压成型时间和温度对粘结钕铁硼/铁氧体复合磁体性能的影响  

Effect of warm flow compaction(WFC) process on the properties of isotropic bonded Nd-Fe-B/ferrite hybrid magnets

作　　者：刘云鹤[1] 钟喜春[1] 黄有林[1] 刘仲武[1] 曾德长[1] 余红雅[1] 邱万奇[1] 

机构地区：[1]华南理工大学材料科学与工程学院,广东广州510640

出　　处：《磁性材料及器件》2011年第6期42-46,共5页Journal of Magnetic Materials and Devices

基　　金：广东省教育部产学研结合项目(2010A090200042;2009B090300273);广东省科技计划项目(2007B010600043;2007B010600007);国家自然科学基金资助项目(U0734001;50874050);中央高校基本科研业务费专项资金项目(2009ZM0291;2009ZZ0025;2009ZM0247)

摘　　要：采用快淬NdFeB磁粉和铁氧体磁粉复合,流动温压成型制备出各向同性粘结钕铁硼/铁氧体复合磁体,研究了流动温压工艺对磁体密度和磁性能的影响。结果表明,随着流动温压成型时间的延长和温度的增高,磁体剩磁Br、内禀矫顽力Hcj、最大磁能积(BH)max和密度增大,当达到一定值后开始减小。矫顽力温度系数β随成型时间的延长有下降的趋势,但基本不随温度变化。Isotropic bonded Nd-Fe-B/ferrite hybrid magnets were synthesized by warm flow compaction （WFC） process using melt spun NdFeB powder and ferrite powder as starting materials. The effects of WFC process on the magnet density and magnetic properties were investigated. The results showed that magnetic properties including Br, Hcj （BH）max and density p of composite bonded magnets increase firstly and then decrease with increasing WFC time and temperature. However, temperature coefficient of coercivity （β） decreases slowly with the increase of WFC time, but not sensitive to WFC temperature.

关 键 词：粘结磁体 流动温压成型 NDFEB磁粉 铁氧体磁粉 磁性能 矫顽力温度系数 

分 类 号：TM273[一般工业技术—材料科学与工程] TF124[电气工程—电工理论与新技术]