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1、JOURNALOFAPPLIEDPHYSICS107,09A3152010Enhancedglass-formingabilityofFeCoBSiNbbulkglassyalloyspreparedusingcommercialrawmaterialsthroughtheoptimizationofNbcontent11,a222YingFu,BaolongShen,HisamichiKimura,AkihiroMakino,andAkihisaInoue1ZhejiangProvinceKeyLaboratoryofMagneticMa
2、terialsandApplicationTechnology,KeyLaboratoryofMagneticMaterialsandDevices,NingboInstituteofMaterialsTechnologyandEngineering,ChineseAcademyofSciences,Ningbo315201,China2InstituteforMaterialsResearch,TohokuUniversity,Katahira2-1-1,Sendai980-8577,JapanPresented21January2010;r
3、eceived24October2009;accepted25November2009;publishedonline19April2010WeoptimizedthealloycompositionsbymodifyingtheNbcontentinFe0.5Co0.50.75B0.20Si0.05100−xNbxx=3.64.4alloysystem.Asaresult,itwasfoundthattheNbcontentof4.3at.%waseffectiveforapproachingalloytoaeutecticpoi
4、nt.Bycoppermoldcasting,Fe0.5Co0.50.75B0.20Si0.0595.7Nb4.3bulkglassyalloyrodswithdiametersupto4mmweresuccessfullysynthesizedevenusingcommercialrawmaterials.Theseglassyalloysexhibitaratherhighsaturationmagnetizationof0.77Tandlowcoerciveforceof2.5A/m.©2010AmericanInstituteof
5、Physics.doi:10.1063/1.3350898SinceamorphousalloysinFe-metalloidsystemwereFe0.5Co0.50.75B0.20Si0.05100−xNbxx=3.64.4alloysystem1,2foundtoexhibitgoodsoft-magneticpropertiesin1974,atoapproachthealloycompositiontoaeutecticpoint,withlargenumberofstudiesonthedevelopmentofsof
6、t-magnetictheaimofimprovingGFA.ThispaperreportstheresultsofamorphousalloyshavebeencarriedoutforthesubsequenttheinvestigationofGFAandmagneticpropertiesofthese20years.However,theshapeanddimensionoftheFe-basedglassyalloys.amorphousmagneticalloyshadbeenlimitedtothinribbonAlloying
7、otswithnominalcompositionsofformwiththicknessesbelowalmost30mduetothene-Fe0.5Co0.50.75B0.2Si0.05100−xNbxx=3.64.4at.%werecessityofahighcoolingrateofalmost106K/sforforma-madebyalloyingindustrialFeBmasteralloyandcommer-tionofanamorphousphase.Bydevotingsubsequentgreatciall
8、ylow-purityFe,Co,andNbmetals,Simetalloidinanefforts,aFe73Al5Ga2P11C5
