纖維結(jié)構(gòu)wcu觸頭材料制備工藝及性能的研究

1、≮’8‘1509分類(lèi)號(hào)西安建筑科技大學(xué)學(xué)位論文纖維結(jié)構(gòu)W／Cu肚頭材料制備工藝廈性能的研究作者三些苧指導(dǎo)教師姓名許云華教授申請(qǐng)學(xué)位級(jí)別塑：主專(zhuān)業(yè)論文提交日期!旦竺墜!!名稱(chēng)巡論文答辯日期!旦墮：!!學(xué)位授予單位魚(yú)壘建塹翌墊叁鱟答辯委員會(huì)主席一評(píng)閱人西安建筑科技大學(xué)碩士論文ManufacturingandPreparationtechniquesandpropertystudyoffiberstructuredW／Cucontactmat

2、erialsMajor：MaterialMaster：WangLinm1_1tor：ProfXuYunhuaAbstractBeingapseudotwo—phasealloycomposedofCuandWelements，W／Cucompositeshavenotonlyhi曲meltingpoint，hi出densitylowthermalcoefficientofexpansionandhighstrength，butalsob

3、etterelectricconduction，beuerheatconductionandplasticityunderroomtemperatureThusW／CucompositesareappliedextensivelyaselectricalcontactmaterialsandelectrodematedalsInthelate1980s，W／Cualloywasusedwidely，suchascontactmateri

4、alsofvacuumcircuitbreakersubstratesoflarge—scaleIC(integratecircuit)andhighpowermicrowaveapparatus，sealandpackagematerialsandjointpartsandradiatorapparatusItisrequiredthatW／Cucompositeswhichareused船contactmaterialsofvacu

5、umcircuitbreakerandelectronappliancesshouldpossessthepmpertiesofhigh—densitylowgas—leaking，betterelectricconductionandheatconduction晡，llileconventionalW／CUalloyaremanufacturedinthepowermetallurgytechniquewhichrequirehigh

6、qualityoftungstenpowerandcopperpowerAsforthepresenttechnology，theproducedtungstenpowerandcopperpowercontainhiighamountofgas，whichlimitelectricalcontactperformanceForexample，thedensityofcontactmaterialsisquitelow(Becausec

7、ontactmaterialsmanufacturedinpowermetallurgytechniqueareeasilyinflatableduringthecourseofsinteringyetitisdifficulttosinterdenselyThebestdensityCanattain92％～95％)，thegascontentishi曲，andelectricalandthermalconductivityislow

8、Inordertoovercomedisfigurementofconventionaltechniquesandmeettherequirementforcontactmaterialsofvacuumcircuitbreakerandmicro—electronindustry，OurscientificgroupresearchanddevelopakindofnewpreparationtechniqueofW／Cucompos