微量添加Fe元素对CuZrAl块体金属玻璃的结构和力学性能的影响.pdf

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1、TransaefionsofNonferrousMetals爱Avai：la三bleo，nSlinecaitewwnwc．secieDnceidrierect．ctomSocietyofChinaTrans．NonferrousMet．Soc．China22(2012)1123—1126www．tnmsc．CnEffectofminor-additionofFeonstructuralandmechanicalpropertiesofCuZrA1bulkmetallicglassxuHong．wei’。，DUYu．1eiI_，DE

2、NGYu。1．EngineeringResearchCenterofMaterialsBehaviorandDesignofMinistryofEducation，SchoolofMaterialsScienceandEngineering，NanjingUniversityofScienceandTechnology,Nanjing210094，China；2．JiangsuInstituteofAdvancedMaterials，Danyang212300，China；3．NationalLaboratoryofSolidSt

3、ateMicrostructuresandCenterforMaterialsAnalysis，NanjingUniversity,Nanjing210093，ChinaReceived19September2011；accepted12January2012Abstract：TheCuZrAlbulkmetallicglasswithminor-additionofFewaspreparedbyrapidquenchingmethod．ThestructureswereexaminedbyX—raydifraction(XRD)

4、．TheefectofFeontheglass-formingabilitywasstudiedbydiferentialscanningcalorimetry(DSC)．Theminor．additionofFeobviouslyextendsthesupercooledliquidregionATx．TheplasticstrainoftheCu44Zr4sA17Febulkmetallicglassisabout1．5％．Themicrostructureswereexaminedbytransmissionelectron

5、microscopy(TEM)．Itisfoundthatwhen1％一2％Fe(molefraction)wereintroducedintotheCuZrA1alloymatrix，nanoscalephaseseparationoccursintheas—preparedCu44Zr48A17Febulkmetallicglass．Keywords：bulkmetallicglass；microstructure；mechanicalproperty；phaseseparation；Feadditionshearbands，

6、andobviousimprovementoftheplasticity．1IntroductionInthepresentwork，Cu44Zr48A17FeBMGwasprepared，theefectsofFeontheGFAandplasticitywerestudied，Itiswellknownthatbulkmetallicglasses(BMGs)andthemicrostructureswereexaminedbyTEM．exhibituniquemechanicalproperties，suchashighst

7、rengthandelasticlimit．excellentcorrosionresistance2Experimental[1，2]，butlimitedroomtemperatureplasticity【3]．ItwasreportedthattheroomtemperatureplasticityofBMGsAlloyingotswithnominalcompositionofcanbeimprovedbyintroducingdendriticandsphericalCu44Zr48AI7Fewerepreparedfr

8、omelementalmetalsbcccrystallinephase[4，5]，nano—sizedcrystallinephase(purity>99．9％、byarc—meltingunderaTigetteredAr[6]intothea