资源描述：
《121 fsp comp jim》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。
1、MaterialsTransactions,Vol.47,No.12(2006)pp.2942to2949#2006TheJapanInstituteofMetalsOntheHardeningofFrictionStirProcessedMg-AZ31BasedCompositeswith5–20%Nano-ZrO2andNano-SiO2ParticlesC.I.Chang1,Y.N.Wang1;2,H.R.Pei1,C.J.Lee1andJ.C.Huang1;*1InstituteofMaterialsScienceandEngineering
2、;CenterforNanoscienceandNanotechnology,NationalSunYat-SenUniversity,Kaohsiung,Taiwan804,R.O.China2InstituteofMaterialsScienceandEngineering,DalianUniversityofTechnology,Dalian116024,P.R.ChinaMg-AZ31basedcompositeswith10{20vol%nano-sizedZrO2and5{10vol%nano-sizedSiO2particleswere
3、fabricatedbyfrictionstirprocessing(FSP).Theclustersofthenano-ZrO2andnano-SiO2particles,measuring180–300nminaverage,wererelativelyuniformlydispersed.TheaveragegrainsizeoftheMgmatrixesofthecompositesvariedwithin2–4mmafterfourFSPpasses.NoevidentinterfacialproductbetweentheZrO2part
4、iclesandMgmatrixwasfoundduringtheFSPmixingZrO2intoMg-AZ31.However,significantchemicalreactionsoccurredattheMg/SiO2interfacetoformtheMg2Siphase.Themechanicalresponsesoftheresultingnano-compositesintermsofhardnessandtensilepropertiesoftheseMg/nano-ZrO2andMg/nano-SiO2compositeswere
5、examinedandcompared.Thegrainrefinementsandthecorrespondinghardeningmechanismsarealsoanalyzedanddiscussed.[doi:10.2320/matertrans.47.2942](ReceivedSeptember1,2006;AcceptedOctober4,2006;PublishedDecember15,2006)Keywords:frictionstirprocessing;magnesiumalloy;nano-sizedparticles;com
6、posite1.Introductionthematrixtoformbulkcomposites.ItiswellknownthatthewidelyusedAZ-seriesMgalloysMetalmatrixcomposites(MMCs)haveattractedattentionfortheenclosuresorcasesofelectronicappliancesareduetotheincreasingneedforstructuralmaterialswithhightypicallysoftandarepronetothewea
7、rproblem.Thespecificstrengthandstiffness.IncomparisonwiththeVicker’shardness(Hv)ofthecommercialAZ91,AZ61andaluminum(Al)alloys,magnesium(Mg)alloyshavealowerAZ31alloysisusuallyaround50–65.Ourpreviouseffortsbydensityby35%,andhaveexhibitedthepromiseasstructuraladding10vol%(volumefract
8、ion)nano-SiO2intoAZ61materialsinengineeringapplication
