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ID:32464971
大小:2.11 MB
页数:54页
时间:2019-02-06
《块体金属玻璃复合材料中塑性晶体相形态演化研究》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、AbstractAbstractTherelatinnsh1pofPreParationconditonand而crostructuresofas一castinsituZr,BasedcompositesWithductilecrystallinePreciPitateswerestudied,aswellastheprocessofdentriteschangingtoSPhero1dalcrystalmicrostructuresofas一astinsituZr-Basedbulkmetallicglass(BMG)comP0s
2、iteswithductilecrystallinePreciPitates、,erestudiedinthisdissertatlon.W七stu衡theevolutionruleandmechanismofthe而crostructuresinsituZr-BasedcomPositos妙thefon”ationofthemicrostrUctures,thethermodynamicsandtheklnetlcs,andwelodgethedefonnat1onmechanismofballcrystal.Theessenti
3、alresearchworkforthedissertationwereinthreeaspeCtS:(1)Zr562TilosNbsoCu6剥i56Bel25as一castinsitucompositeswithductile卿stallinePreciPitates初thdiferenidiametrswerePrePared,andtheresultcantellusthattheballaveragedialneteraI1dthevolumeftactionsofsPheroidal刀phaseofas一castinsit
4、UZr.Basedbulkmeta11icglasscomPositeswithductilecrystaI1inePreciPitateswereincreasedcamelongwiththediameterincreasing(2)Zr6oTil467Nb533Cu,,6Ni;对Belo丫va名choosedforthisreseachw七changedtheParameterinthisexPerimentandgotaseriesclubbedsamPIesas一castinsituZr-BasedcomPositeswi
5、1hductilecrystaIlinePreciPitateswithdifl七rentheatpreservationtimes.W已sawthetheProcessofdentritesc】langingtosPheroidalcrystalgraduallyandthisProcesstoldusthattheheatPreservat1on1imescanafect刀phasePattemaswellasPhasediniensionalsizeas一castinsituZr-BasedcomPositeswithduct
6、11ecrystallinePreciPitates,andenoughheatPreservationtimeistheguaranteefOrthe刀PllasecomPletsPlleroidiZation.(3)Astheevolutionruleforthebasis,theessentialofthedeformationoft】1eba11crysta11sthetwoorthirdgr0Wthbriilantannrootblow-outbaluPcrysla1Phasegivepriorityto.Keywords
7、:Bulkmetallicglass,ComPosites,PreParationcondition,MICFOSlruCtureFoll】lationCV0lVCflClt.II声明本学位论文是我在导师的指导下取得的研究成果,尽我所知,在本学位论文中,除了加以标注和致谢的部分外,不包含其他人已经发表或公布过的研究成果,也不包含我为获得任何教育机构的学位或学历而使用过的材料。与我一同工作的同事对本学位论文做出的贡献均己在论文中作了明确的说明。研究生签名:遗生是‘多甲年>月‘相学位论文使用授权声明南京理工大学有权保存本学位论文的电子和
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