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1、专辑等287Al含量对Zr基块体非晶合金力学性能的影响李春燕1,2,寇生中1,2,赵燕春1,2,袁小鹏1,袁子洲1,2(1.兰州理工大学材料科学与工程学院甘肃兰州730050;2.兰州理工大学省部共建有色金属先进加工与再利用国家重点实验室,甘肃兰州730050)摘要:用铜模吸铸法制备了(Zr64.8/90Cu14.85/90Ni10.35/90)90+xAl10-x(x=-4,-3,-2,0,2,4,6)块体合金,利用X射线衍射仪(XRD)、万能试验机、显微硬度计和扫描电镜(SEM)研究了Al含量改变对Zr基块体
2、非晶合金力学性能的影响。结果表明:随着Al含量的减小,合金先是从非晶相为主的非晶/晶体复合材料转变为完全非晶材料,接着转变为以晶体相为主的非晶/晶体复合材料,最后转变为完全晶体材料。表明通过调整Al的含量,可以制备出具有完全非晶结构的Zr基块体非晶合金。当x=-2时,即合金成分为Zr63.36Cu14.52Ni10.12Al12时,合金为完全非晶结构,该合金的室温压缩塑性应变达到20.6%,应力-应变曲线体现出了“加工硬化”特性,屈服强度(σs)、极限强度(σm)和断裂强度(σf)分别为1740.6,2030.7
3、和1510.5MPa。表明通过调整Al的含量,可以制备出具有优良室温压缩塑性的Zr基块体非晶合金。随着Al含量的减小,合金试样的显微硬度的总体趋势为先增大再减小。当x=2时,合金为非晶/晶体复合材料,该合金具有较高的显微硬度HV719.8。关键词:SPE纯水电解;微孔层;扩散层;气液传输中图分类号:TK91文献标识码:A文章编号:1000–4343(2012)–0283–05MechanicalPropertiesofZr-basedBulkMetallicGlasseswithDifferentAlConten
4、tsLiChunyan1,2,KouShengzhong1,2,ZhaoYanchun1,2,YuanXiaopeng1,YuanZizhou1,2(1.CollegeofMaterialScienceandTechnology,LanzhouUniversityofTechnology,Lanzhou730050,China;2.StateKeyLaboratoryofAdvancedProcessingandRecyclingofNon-ferrousMetals,LanzhouUniversityofTec
5、hnology,Lanzhou730050,China)Abstract:(Zr64.8/90Cu14.85/90Ni10.35/90)90+xAl10-xbulkalloyswithx=-4,-3,-2,0,2,4and6werepreparedwithcoppermoldcastingmethod.TheeffectsofAlcontentsonmechanicalpropertiesofZr-basedbulkmetallicglasseswerestudiedbyX-raydiffraction(XRD)
6、,universaltestingmachine,microhardnesstesterandscanningelectronmicroscope(SEM).TheresultsshowedthatwiththedecreaseofthecontentofAlelement,thestructureofalloyschangedfromamorphous/crystalcompositematerialswithmainlyamorphousphaseintocompletelyamorphousmaterial
7、s,andthenintoamorphous/crystalmaterialswithmainlycrystallinephase,andfinallyintofullycrystallinematerials.ItmeantthatZr-basedbulkmetallicglasseswithcompletelyamorphousstructurecouldbefabricatedbyadjustingAlcontent.Thestructureofthealloywascompletelyamorphousw
8、henx=-2,withalloycompositionofZr63.36Cu14.52Ni10.12Al12,andthecompressiveplasticstrain(εp)ofthealloywasupto20.6%.Theyieldstrength(σs),maximumstrength(σm)andfacturestrength(σf)were1740.6,2