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1、納米晶軟磁合金磁損耗的研究天津理工大學(xué)本科畢業(yè)論文納米晶Fe-Co-Cu-Nb-Si-B軟磁合金磁損耗的研究學(xué)生姓名:趙承鵬學(xué)號(hào):20072130所學(xué)專業(yè):集成電路設(shè)計(jì)及集成系統(tǒng)班級(jí):07級(jí)1班指導(dǎo)老師:丁燕紅2011年6月1摘要與傳統(tǒng)的金屬軟磁材料相比,納米晶軟磁合金由納米尺度的晶粒以及大量非晶界面組成,晶粒間的鐵磁交換耦合作用使其內(nèi)部的局域磁各向異性顯著降低,因而具有優(yōu)異的軟磁性能,有望獲得高磁導(dǎo)率。交變磁場(chǎng)作用下,磁性材料一方面被磁化,另一方面會(huì)產(chǎn)生能量損耗,導(dǎo)致鐵芯發(fā)熱。所謂磁損耗是指磁性材料在交變磁場(chǎng)作用下產(chǎn)生的各種能量損
2、耗的統(tǒng)稱。磁性材料在交變磁場(chǎng)中,磁感應(yīng)強(qiáng)度B在時(shí)間上滯后于交變磁場(chǎng)HAC的變化,使B和HAC之間存在一個(gè)相位差?。通過測(cè)量合金交變磁場(chǎng)下的磁導(dǎo)率,來計(jì)算磁滯損耗系數(shù)a,渦流損耗系數(shù)和剩余損耗系數(shù)c,對(duì)于研究軟磁合金的交流磁性有重要意義。關(guān)鍵詞:Fe-Co-Cu-Nb-Si-B合金、納米晶、軟磁材料、初始磁導(dǎo)率、磁損耗。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目錄第一章緒論.............................................................................................................
7、..........1引言...................................................................................................................................................11.1納米晶軟磁材料應(yīng)用................................................................................................
8、.................21.2納米晶軟磁合金的制備......................................................................................