碳化硅纳米线增韧碳化硅纤维碳化硅基体损伤行为研究（英文）-豆柴文库

您所在位置：网站首页 / 碳化硅纳米线增韧碳化硅纤维碳化硅基体损伤行为研究（英文）.docx / 文档详情

在线预览结束，喜欢就下载吧，查找使用更方便

5 金币

下载文档

/ 2

下载提示

如果您无法下载资料，请参考说明：

1、部分资料下载需要金币，请确保您的账户上有足够的金币

2、已购买过的文档，再次下载不重复扣费

3、资料包下载后请先用软件解压，在使用对应软件打开

文本预览

碳化硅纳米线增韧碳化硅纤维碳化硅基体损伤行为研究（英文）
Title:ResearchonTougheningBehaviorandDamageofSiliconCarbideNanowireReinforcedSiliconCarbideFiberSiliconCarbideMatrix
Abstract:
Siliconcarbide(SiC)fibersexhibitexcellentmechanicalproperties,suchashighstrengthandstiffness,makingthempromisingmaterialsforvarioushigh-performanceapplications.However,theirbrittlenesslimitstheirusageincertainhigh-stressenvironments.Toaddressthislimitation,researchershaveexploredusingsiliconcarbidenanowires(SiCNWs)asreinforcementstoenhancethetoughnessofSiCfibers.
ThispaperaimstoinvestigatethetougheningbehavioranddamagemechanismofSiCNW-reinforcedSiCfiberswithasiliconcarbidematrix.Thestudyinvolvesanalyzingthemicrostructureandmechanicalpropertiesofthecompositematerial,aswellasobservingthedamageevolutionduringmechanicalloading.
Firstly,aSiCNWsynthesismethodcapableofproducinghigh-qualitynanowiresisemployed.Thephysicalandchemicalpropertiesofthenanowiresarecharacterizedusingtechniquessuchasscanningelectronmicroscopy(SEM)andX-raydiffraction(XRD).TheSiCNWsarethenincorporatedintotheSiCmatrixtoformSiCNW-reinforcedfibers.
Subsequently,mechanicaltestingisconductedtoevaluatethemechanicalpropertiesofthecompositematerial.Tensiletestsareconductedtodeterminetheultimatestrength,modulus,andstrain-to-failureoftheSiCNW-reinforcedfibers.Additionally,flexuraltestsareperformedtoinvestigatethetoughnessenhancementprovidedbytheSiCNWs.
ThemicrostructureanddamageevolutionoftheSiCNW-reinforcedfibersareanalyzedusingSEMandtransmissionelectronmicroscopy(TEM).ThesetechniquesallowfortheobservationoftheSiCNWdispersionwithintheSiCmatrixandtheidentificationofthedamagemechanisms,suchasfiberpull-out,crackdeflection,andinterfacialdebonding.
Furthermore,thefracturesurfacesofthematerialareexaminedusingscanningelectronmicroscopytogaininsightsintothetougheningmechanisms.ThepresenceofSiCNWsisexpectedtopromoteenergydissipationandhindercrackpropagationthroughmechanismssuchascrackbridgingandcrackbranching.
Basedontheresultsobtained,thetougheningbehavioranddamage