低碳PrNd合金制备烧结钕铁硼磁体  

Fabrication of sintered Nd-Fe-B magnets with low carbon content PrNd alloys

作　　者：邹宁 郑巨根 邹旭杰 邹永博 邹宇钦 

机构地区：[1]宁波复能新材料股份有限公司,浙江宁波315336

出　　处：《金属功能材料》2016年第3期51-53,共3页Metallic Functional Materials

摘　　要：采用不同碳含量的PrNd合金原料,制备了名义成分为(PrNd)_(30.7)Cu_(0.2)Fe_(bal)B_(0.98)的钕铁烧结硼磁体,研究了碳含量对磁体磁性能和微观组织的影响。结果表明,PrNd合金中的碳含量对烧结磁体中的碳含量影响显著。碳含量增加会导致磁体内富稀土相的相对减少以及一些含碳相的增加,从而引起矫顽力的降低。当磁体中碳含量最低至335×10^(-6)时,其方形度和综合磁能最好,矫顽力达到909kA/m。PrNd alloys with different carbon content were applied to preparation of the nominal compositions of （PrNd）_（30.7）Cu_（0.2）Fe_（bal）B_（0.98）（mass fraction%） magnets. Effects of carbon content on the magnetic properties and the microstructure of the magnets were investigated. The carbon content of the magnets was influenced by the carbon content of the PrNd alloys. The increase of carbon reduces the rare earth-rich phase in the magnets, and presents carbide-phase in the magnets, which lead to the decreasing of eoercivity. The magnet has the best magnetic proper- ties for Hcj = 909 kA/m with the lowest carbon content for 335 × 10.-6.

关 键 词：镨钕合金 碳含量 烧结钕铁硼 磁性能 矫顽力 

分 类 号：TM273[一般工业技术—材料科学与工程]