【作者】 马毅龙； 陈登明； 孙建春；

【Author】 MA Yi-long,CHEN Deng-ming,SUN Jian-chun (School of Metallurgy and Materials Engineering,Chongqing University of science and technology, Chongqing 401331,China)

【机构】 重庆科技学院冶金与材料工程学院；

【摘要】 使用放电等离子烧结（SPS）制备了各向同性及各向异性Nd_13.5Fe_80.4Ga_0.5B_5.6/α-Fe致密磁体,并研究了软磁相含量对复合磁体性能的影响,结果表明,适量Fe的添加可提高热压（HP）磁体的磁能积,当Fe含量较多时,磁体矫顽力大幅下降,磁能积降低;热变形（HD）后,磁体退磁曲线呈现单一硬磁相特征,且少量Fe的添加可改善磁体的最大磁能积,添加2.5%（质量分数）Fe后磁体最大磁能积为358kJ/m³,而过量Fe的添加影响c轴织构的形成,并加重烧结过程中磁体的氧化,从而导致磁性能下降。更多还原

【Abstract】 Isotropic and anisotropic bulk Nd_13.5Fe_80.4Ga_0.5B_5.6/α-Fe magnets have been obtained by using spark plasma sintering technique and the effect of soft magnetic phase content on magnetic properties has been studied. The result shows that the magnetic properties of hot-pressed magnets could be enhanced by proper addition of Fe powder.For hot-deformed magnets,the demagnetization curve has the characteristic of single hard phase magnet and the maximum energy product increases to 358kJ/m3 at the addition of 2.5wt%Fe.When the content of Fe is more than 5wt%,the magnetic properties decrease due to the formation of bad texture and being oxidized during sintering.更多还原