CAJ | 학술논문

采用快淬及热处理工艺,通过复合添加Dy和Ga,制备了高磁性能的NdFeB纳米复合永磁合金.最佳条件下,添加Dy和Ga的合金磁性能为Jr=1.16T、Hci=580.92kA/m和(BH)max=162.74kJ/m3;而不合Dy和Ga的NdFeB合金为Jr=1.18T、Hci=379.5kA/m和(BH)max=119.5kJ/m3.X射线衍射和透射电子显微分析表明两种合金均由2:14:1硬磁相和α-Fe软磁相组成.2:14:1相晶粒尺寸在两合金中相当,但添加Dy和Ga的合金的α-Fe相晶粒尺寸和含量分别小于和低于不含Dy和Ga的NdFeB合金.
채용쾌쉬급열처리공예,통과복합첨가Dy화Ga,제비료고자성능적NdFeB납미복합영자합금.최가조건하,첨가Dy화Ga적합금자성능위Jr=1.16T、Hci=580.92kA/m화(BH)max=162.74kJ/m3;이불합Dy화Ga적NdFeB합금위Jr=1.18T、Hci=379.5kA/m화(BH)max=119.5kJ/m3.X사선연사화투사전자현미분석표명량충합금균유2:14:1경자상화α-Fe연자상조성.2:14:1상정립척촌재량합금중상당,단첨가Dy화Ga적합금적α-Fe상정립척촌화함량분별소우화저우불함Dy화Ga적NdFeB합금.
The Dy and Ga substituted NdFeB nanocomposite permanent magnetic alloys with high magnetic properties have been prepared by proper wheel speed of melt-spinning and post annealing treatment. Under optimal conditions, compared with the best magnetic properties of ternary NdFeB alloy of Jr = 1.18T, Hci = 379.5kA/m and ( BH) max = 119.5kJ/m3, the best magnetic properties of the alloy with Dy and Ga substitutions are Jr = 1.16T, Hci =580.5kA/m, and (BH) max = 162.7kJ/m3. The XRD and TEM results showed that each of two alloys consists of hard magnetic 2:14:1 phase and soft magnetic α-Fe phase. The grain size of 2:14:1 phase is about equal in two alloys. The grain size and content of α-Fe phase in Dy and Ga substituted alloy are finer and lower respectively.