纳米晶软磁合金磁损耗的研究

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1、纳米晶软磁合金磁损耗的研究天津理工大学本科毕业论文纳米晶Fe-Co-Cu-Nb-Si-B软磁合金磁损耗的研究学生姓名：赵承鹏学号：20072130所学专业：集成电路设计及集成系统班级：07级1班指导老师：丁燕红2011年6月1摘要与传统的金属软磁材料相比，纳米晶软磁合金由纳米尺度的晶粒以及大量非晶界面组成，晶粒间的铁磁交换耦合作用使其内部的局域磁各向异性显著降低,因而具有优异的软磁性能,有望获得高磁导率。交变磁场作用下，磁性材料一方面被磁化，另一方面会产生能量损耗，导致铁芯发热。所谓磁损耗是指磁性材料在交变磁场作用下产生的各种能量损

2、耗的统称。磁性材料在交变磁场中，磁感应强度B在时间上滞后于交变磁场HAC的变化，使B和HAC之间存在一个相位差?。通过测量合金交变磁场下的磁导率，来计算磁滞损耗系数a，涡流损耗系数和剩余损耗系数c，对于研究软磁合金的交流磁性有重要意义。关键词：Fe-Co-Cu-Nb-Si-B合金、纳米晶、软磁材料、初始磁导率、磁损耗。ABSTRACTComparedtosoftmagneticmaterialsofconventionalmetallic,nanocrystallinesoftmagneticalloygrainsbythenano

3、-scaleandalargeofamorphousinterface,theferrom-agneticexchangeofgrainscouplingbetweenthelocalmagneticanisotropywithinitssignificantlylower.Andthusexcellentsoftmagneticpropertiesisexpectedtobehighpermeability.IntheAlternatingmagneticfield,themagneticmaterialismagnetizedo

4、ntheonehand,ontheotherhandthelossingenergywillleadtocoreheat.Theso-calledMagneticlossisthegeneraldesignationofthemagneticmaterialsinalternatingmagneticfieldthatproducedbyavarietyofenergylosscollectively.Inalternatingmagneticfield,B(magneticinduction)islaggedtothechange

5、ofHAC(thealternatingmagneticfield)onthetime,ThereisaphasedifferencebetweentheBandHAC.Bymeasuringthemagneticpermeabilityinthealloyalternatingmagneticfield,tocalculatethecoefficientofhysteresisloss,eddycurrentlosscoefficientandresiduallosscoefficientisveryimportantforres

6、earchingtheexchangemagneticofthesoftmagneticalloy.KeyWords:ThealloyofFe-Co-Cu-Nb-Si-B,Nanocrystal,SoftMagneticMaterial,Initialpermeability,Magneticloss.2目录第一章绪论.............................................................................................................

7、..........1引言...................................................................................................................................................11.1纳米晶软磁材料应用................................................................................................

8、.................21.2纳米晶软磁合金的制备......................................................................................