资源描述：
《先驱体转化法制备氧化锆毡--ZrO2多孔复合材料的力学与热导率性能 -》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、Thethermalconductivityandmechanicalpropertiesofhighlyporouszirconiafelt/ZrO2compositesbyzirconiumoxideprecursorimpregnationJianpingAia,b,GuohongZhoua,*,ZhengjuanWanga,b,HailongZhanga,XianpengQina,b,PengLiua,ShiweiWanga,*aTheStateKeyLaboratoryofHighPerformanceCeramicsandS
2、uperfineMicrostructures,ShanghaiInstituteofCeramics,ChineseAcademyofSciences,1295DingxiRoad,Shanghai200050,PRChinabUniversityofChineseAcademyofSciences,Beijing100049,PRChinaAbstractThevacuumpressureimpregnationmethodwasadoptedtomakebothlowthermalconductivityandhigh-tempe
3、ratureresistanceporouszirconiafelt/ZrO2composites.Incorporatingzirconiafeltintoporouszirconiamatrixtoimprovethemechanicalstrength.Meanwhile,lanthanumnitrateasanadditivetoyttrium-stabilizedzirconiatoreducethethermalconductivityofthematrix.Theeffectofsinteringtemperatureon
4、compressivestrengthandthermalconductivitywereinvestigatedonthebasisofporosity,microstructureandcomposition.Thetetragonalphaseandthecubicphaseco-existedat1450℃,whilethecubicphasepredominatedupon1450℃aszirconiaionswerereplacedbylanthanumandyttriumions.Andtheopenporosityand
5、sizeofsmallporesdecreasedasthesinteringtemperatureincreasedfrom1450to1600℃duetothezirconiagrainsgrewup,adecreaseofopenporosityfrom48.1%to42.5%.Comparedwithothertemperaturesinteredsamples,the1600℃-sinteredsamplesalwaysownedhigherthermalconductivityvalueof0.70~0.78W/(m•K)a
6、tlowertemperature,inversely,possessedlowerthermalconductivityafter800℃.1.IntroductionZirconia-basedceramicshavehighmeltingpoint,excellentmechanicalstrength,lowthermalconductivitycomparedwithotherceramics[1-3].Itisthereforeofinteresttoconsiderthemasthermalprotections.Zirc
7、onia-basedceramicsshowpromiseasthermalbarriercoatings(TBCs)[4-6].TBCsofferadvantageinthermalinsulating,however,theycannotmeetthestrengthrequirementofthermalprotectionswhichrequirenotonlylowthermalconductivitybutalsohighstrength.Therefore,itissignificanttoresearchzirconia
8、-basedceramicsasbulkmaterialswhichmeetboththermalandmechanicalrequirements.Ithasbeenconfirmedthattherma
