资源描述：
《139_Formation-of-iron-nickel-nanocrystalline-alloy-by-mechanical-alloying》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。
1、NanoStrucmredMaterials,Vol.12,pp.139-142,1999ElsevierScienceLtdPergamon81999ActaMetallurgicaInc.PrintedintheUSA.Allrightsreserved096%9773/99/$-seefrontmatterPI1s0965-9773(99)00083-5FORMATIONOFIRON-NICKELNANOCRYSTALLINEALLOYBYMECHANICALALLOYINGV.V.Tcherdynt
2、sevl,S.D.Kaloshkinl,LA.Tomilinl,E.V.Shelekhovl,Yu.V.Baldokhin*‘DepartmentofPhysicalChemistry,MoscowSteelandAlloysInstitute,Leninskyprosp.,4,Moscow,117936,Russia,vvch@phch.misa.ac.ru2InstituteofChemicalPhysicsAcademyofScience,Kosyginastr.,4,Moscow117334,Rus
3、siaAbstract-Fe,.,Ni,alloyswerepreparedbymechanicalalloyingofelementalpowdersinhigh-energyplanetaryballmillinawideconcentrationrangeofcomponents(10sx-40).ThestructurewasstudiedbyX-raydiffractometry.Itisshownthatconcentrationrangesofsingle-phasesolidsolution
4、ofMAsamplesaremarkedlywiderthanthatofthermodynamicallystablealloys.CharacterofX-raypeaksindicatesthatthereisahighdensityofcrystallinelatticedefectsincludingstackingfaults.Blocksizes,calculatedwithoutconsideringstackingfaultspresence,wasfoundtobe8-15nm,andc
5、alculatedwithconsideringofstackingfaults30-80nm.TheresultswerediscussedonthebasisofthermodynamicmodelofMA.01999ActaMetallurgicainc.INTRODUCTIONPossibilityofproductionofnonequilibriumphasesandverydefectivestructuresinduceespecialinteresttotheprocesseswhicho
6、ccurduringMA.Itispossibletoprepareamorphousphases,supersaturatedsolidsolutions,andothernonequilibriumstructuresbyMA.UnusualdistributionofstructuredefectscomparingtothoseinthealloyspreparedbytraditionalmethodsistypicalfortheMAalloys.Iron-nickelalloysareofgr
7、eatinterestduetotheirmagneticandmechanicalproperties.Therearesomestudies,wherestructureandpropertiesofMAiron-nickelalloyswereinvestigated.Unfortunately,investigationofMAFe-Nialloysinawideconcentrationrangewasreportedonlyinfewstudies[l-31.Concentrationrange
8、sofb.c.c.andf.c.c.phasesexistinginMAFe-Nialloysdependonmillingintensity:anincreaseofintensityleadstoextendingoftheconcentrationrangeofexistingoff.c.cphaseandtonarrowingofthatofb.c.cphase[1,3].Thisphenomenamay
