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ID:32460858
大小:2.75 MB
页数:72页
时间:2019-02-06
《cntszm5镁合金复合材料的制备与机械性能研究》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、AbsttaCtABSTRACTCarbonnanotllbes(CNTs)/ZM5alloycompositeswerefabricatedbystiringcaStingmethodwiththeefectprocedureofthestiringtechnofogystUdiedThemech耐calProPeniesofthecom卯siteswhichwereunderthestateofas一cast,T4solutiontrealmentandhigh,emperalllre讹retes忱d.Themicrostructureand丘acto『aPhswe
2、reobservedandana】ysisedviascaningelectrOnmicroscoPe(SEM)即denergyspectnjmanalysis(EDS).StartingwiththeenhancemenioftheinterfacemoisteningPrOpertyanddispersibilitybetweenCNTs明dZM5allOy’theefectrulesofroom一temeraturemechanicalProPertiesande1evatedtemPeraturePropertiesofcomposi忱swhenenhancln
3、gthemasfr‘tionofCNTsaddltionwcreinvestiga忱dsystematically.Atthesalnetime,thechangeofmicrostrUctureandfract。孚aPhswasinvestigated.T五e化sultssho叭ledthat:CNTscouldbeaddedinio1heMgmoltenallOywithstitringattheten1peraturenearZM5aIloyliquldoid.Whenunderthestateofas,cast,T4solutinn能歌me以朋dhightemp
4、erature,the目ditionofCNTscouldsignifcantlyc曲ancethemechanicalPropertiesofcomPosites,therulesofwhichwerealwaysenhancing,thenreachingthernaximun、助ddroPPingatlast,六刀dalso,NIPlatingCNTscouldreinforcethecomPositesmuchbeterUnderthestaeofas一c韶t,whentheaddltionofCNTswasl.0川肠,tbelensileslrengthand
5、奴elasticmodulusreachedlhe们比axi幻。u们n.Whenthe£祖itonofCNTswere12wt%ando.SWt%,山emicrohardnesandtheductilityreachedthe伴akvalue化speCtively.AfterT4solution加atment,thetensilestren酗即dtheduc61ityenh朗cedremarkably.buttheelasticmodu1usandthemicrohardnessdeclinedWhentheadd1tionofCNTSwerel.0训肠ando.SWt
6、%,themax加ulnofthetensilestren沙即dtheduclllitywere244MPaand12.26%respectively’Underthestateofhightemperaturc,thetensileslrengthdeclinedre们比arkably,andtheductlhtyenhanced.W】lentheadditonofCNTs、vcrel.ZWt%,thetensilestrengthandtheductil妙re朗hedthemaximu,Whlchis23一科%助d379%morethanthevalueofthem
7、a廿ixrespectively.T七ele把ilestrengthofcomPOsitesin150℃让mperaturewasmuchhigher1hanthestrengthin200℃忱mperature.CNTsAbstractcouldnotonlyrefinethegrainsofthecomPosites,butalsooverlapthegrainsandbeartheloadofresistancetodeformation.Aithestaeofhightemperature,CNTscouldrestrainthe
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