稀土永磁体的γ辐照效应研究  

Effect of γ-Radiation on Rare-Earth Permanent Magnets

作　　者：杨仕清[1] 张万里[1] 龚捷[1] 彭斌[1] 王豪才[1] 

机构地区：[1]电子科技大学信息材料工程学院,四川成都610054

出　　处：《功能材料》2000年第3期250-251,共2页Journal of Functional Materials

基　　金：国防预研基金资助

摘　　要：对烧结与粘结NdFeB、烧结SmCo5及其经化学镀Ni-P处理后的稀土烧结永磁体进行了γ辐照效应和磁性能测试研究。累积照射剂量大约为 2 .5× 10 5Gy时 ,这些永磁体的表面磁场仍无明显变化 ,即无不良影响。说明不论是烧结还是粘结稀土永磁体均具有一定的抗γ辐照能力。对这种效应的机理进行了探讨。The effect of radiation from a γ-source on the magnetic properties of sintered NdFeB,SmCo 5,bonded NdFeB and their electroless Ni-P alloy coating has been measured.Up to an accumulated dose of 25×10 4Gy, the surface magnetic strength for those permanent magnets are not affected significantly.As a consequence,both sintered and bonded rare-earth magnets possess the ability of radiation resistance.Some mechanisms for this effect were investigated and discussed.

关 键 词：稀土永磁体 γ辐照效应 表面磁场 累积照射剂量 

分 类 号：TM273.014[一般工业技术—材料科学与工程] TM272.014[电气工程—电工理论与新技术]