酚醛树脂粘结钕铁硼磁体温压制备技术研究  

Study on phenolic resin bonded NdFeB magnets prepared by warm compaction molding

作　　者：张修海[1] 熊惟皓[1] 李燕芳[1] 

机构地区：[1]华中科技大学材料成型与模具技术国家重点实验室,湖北武汉430074

出　　处：《功能材料》2009年第6期900-902,共3页Journal of Functional Materials

基　　金：国家自然科学基金重点资助项目(50634060)

摘　　要：用温压成型工艺制备了酚醛树脂粘结钕铁硼磁体,通过对磁体密度、剩磁、矫顽力、磁能积和抗弯强度的分析,研究了耦联表面处理对磁粉抗氧化性能的影响及成型工艺对磁体性能的影响。结果表明:偶联处理可以明显提高磁粉的抗氧化能力;在压力为620MPa,温压温度为180℃且不进行二次固化条件下获得了性能最佳的磁体,其密度为6.12g/cm3,抗弯强度为59.25MPa,剩磁为0.6824T,内禀矫顽力为730kA/m,最大磁能积为78.2kJ/m3。Phenolic resin bonded NdFeB magnets were prepared by method of warm compaction molding. The effects of coupling surface treatment on the antioxidation of magnetic powders and forming technology on the properties of magnets were studied through the analysis of density, Br, He, （BH）max and bending strength of bonded magnets. The results show that the coupling treatment can improve the antioxidation of magnetic powders clearly. The properties of magnets are the best when the compaction pressure is 620MPa, the warm compaction temperature is 180℃ and there is without second thermoharding, whose properties are the following： p =-6.12g/cm^3, σb=59.25MPa, B,=0. 6824T, Hcj=730kA/m and （BH）max=78. 2kJ/m^3

关 键 词：温压成型 粘结钕铁硼磁体 酚醛树脂 

分 类 号：TG146.4[一般工业技术—材料科学与工程]