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采用蒸发冷凝法制备了Fe纳米颗粒,与SmCo5球磨粉末进行机械混合,采用放电等离子热压烧结(Spark Plasma Sintering,SPS)技术制备全致密的各向异性SmCo5/Fe纳米双相复合磁体。研究结果表明当软磁相含量较低时磁体能够获得C轴晶体织构,但是随着Fe掺杂量的增加,磁体的各向异性越来越弱。当Fe的掺杂量达到20wt.%时,磁体基本表现为各向同性磁体的特征。随Fe掺杂量的增加,各向异性磁体的饱和磁化强度Ms逐渐增大,剩磁Mr先升高后降低,矫顽力Hci则总体呈减小趋势,当Fe掺杂量为2.5wt.%时,磁体获得最佳磁性能:Ms=0.69T,Mr=0.64T,Hci=2.08T。
Fe nanoparticles were prepared by evaporation condensation method and mechanically mixed with SmCo5 ball milling powders. The fully dense anisotropic SmCo5 / Fe nano-duplex composite magnets were prepared by Spark Plasma Sintering (SPS). The results show that the magnet can obtain C-axis crystal texture when the content of soft phase is low, but the anisotropy of magnet becomes weaker and weaker with the increase of Fe doping content. When Fe doping amount reaches 20wt.%, The magnet basically behaves as the characteristic of the isotropic magnet. With the increase of Fe doping, the saturation magnetization Ms of anisotropic magnet gradually increases, the remanence Mr increases first and then decreases, and the coercivity Hci decreases generally. When the Fe doping amount is 2.5wt. %, The magnets obtain the best magnetic properties: Ms = 0.69T, Mr = 0.64T, Hci = 2.08T.