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1、先进复合材料工艺理论基础第三讲：界面反应主讲人：于家康Tel：88494987(O）88486066（Lab)13669220001（M)Email:提纲引言金属-陶瓷界面反应自生复合材料的界面反应引言外加复合材料：金属基：C+AlAl4C3陶瓷基：C+SiSiC碳基：聚合物基：引言自生复合材料：insitumetalmatrixcompositesaluminum,titanium,copper,nickelandiron),andsecond-phaseparticles(includingborides,carbides,nitrides,oxidesandtheirmixtures金属
2、-陶瓷界面反应铝与陶瓷：3SiO2+4Al2Al2O3+3Si金属-陶瓷界面反应钛与陶瓷：5Ti+B4C4TiB+TiC自生复合材料的界面反应自生工艺中的反应自生反应热力学自生陶瓷相的形成机理自生复合材料的显微组织自生工艺中的反应固-液反应自蔓延高温合成（SHS)Compositionofreactantpowdermixture,measuredmaximumtemperatures,andaveragepropagationrates自生工艺中的反应固-液反应放热弥散（XD)自生工艺中的反应固-液反应反应热压（RHP)3TiO2+4Al+6B2Al2O3+3TiB2Molecularrat
3、ioofinstartingTiO2AlBmaterialsandnominalcontentofgeneratedphases(vol.%)incompositeproducts自生工艺中的反应固-液反应燃烧辅助铸造5Ti+B4C4TiB+TiCastoichiometricamountofreactantpowdersisfirstblendedthoroughlyandthencompactedintopellets.Thecompactedpelletandtherequiredamountofmatrixaremeltedandthencastintoagraphitemold.Th
4、eceramicreinforcementsareformedinsituduringmeltingviaexothermicreactionsbetweenthereactants自生工艺中的反应固-液反应直接反应合成（DRS)Ticu+CTiCTicu+B2O3+3CTiB2+3COcompactsofreactantpowders,aredirectlyaddedintomoltenmetalandtheceramicreinforcingparticlesareformedinsituthroughtheexothermicreactionbetweenreactantsorbetwe
5、enreactantandsomecomponentofthemelt自生工艺中的反应固-液反应熔剂辅助合成（FAS)3K2TiF6+13Al3TiAl3+3KAlF4+K3AlF62KBF4+3AlAlB2+2KAlF4AlB2+TiAl3TiB2+4AlDuringthesynthesis,mixedsaltsofpotassiumhexafluorotitanate(K2TiF6)andpotassiumtetrafluororate(KBF4)areintroducedintoastirredaluminummeltwithanatomicratioinaccordancewithTi
6、/2B自生工艺中的反应固-液反应熔剂辅助合成（FAS)自生工艺中的反应固-液反应反应自发浸渗（RSI)3SiO2+4Al2Al2O3+3SiSiO2particulatepreformplacedinsideaquartztubeof9mmdiameterand15mmlengthisimmersedintheAlmeltAlmatrixcompositesreinforcedwithmicroAl2O3/AlparticlesviareactiveinfiltrationofmoltenAlintopreformsofSiO2orMg+SiO2mixturesat1348K自生工艺中的反应固
7、-液反应其它金属直接氧化(DIMOX)快速凝固技术(RSP)反应挤压铸造(RSC)自生工艺中的反应气-液-固反应(VLS)2Ti+N22TiNAl4.5Mg6.2Ti(inwt.%)parentalloywasmeltedinaninductionfurnace,andsubsequently,thechamberwasback-filledwithpurifiedargon.Uponreachinganappropriateprocessingtemperature,cleanN2gaswasintroducedintotheAlalloymelt自生工艺中的反应固-固反应机械合金化(MA)
8、Mechanicalalloying(MA)isasolidstatepowderprocessingmethodwhichinvolvesrepeatedcolddrawingandfractureofparticlesasaresultofthehighenergyballsamplecollisions.Thismethodcanbeusedtoproducefine-grainedalloyedpowderparticlesinmetalmetalandmetalceramicsystems自生工艺中的反应固-固反应反应热压(RHP)Nominalcontentofgeneratedp
9、hases(vol.%)ininsituTi-basedcompositesbyassuminginsitureactionstakeplacecompletelyinallsystems自生工艺中的反应液-液反应Theprocessinvolvesthereactionbetweentwometalstreamstoformrefractoryparticles.Twoormorehigh-speed,turbulent,molten-metalstreamscontainingcomponentsofahigh-temperature(ceramic)phase,forexampleCuT
10、iandCuB,aremadetoimpingeupononeanotherinamixingchamber,resultinginintimatemixingandreactiontoproducethesecondphase.Theresultingmixturecanthenbecastinamoldorrapidlysolidifiedviameltspinningoratomization.ThistechnologyiseffectiveinproducingcoppermatrixcompositesreinforcedwithnanoscaleTiB2particulates(
11、50nm)fortheelectricalapplications自生反应热力学AlTiC systemChangeofGibbsfreeenergyGasatemperatureforTiC,Al4C3andAl3Tiformation自生反应热力学AlTiC systemThermodynamicdataasafunctionoftemperatureforthereaction3Al3Ti(s)+Al4C3(s)3TiC(s)+13Al(l)自生反应热力学AlTiC systemThermodynamicdataasafunctionoftemperatureforthereaction
12、3Al3Ti(s)+C(s)TiC(s)+3Al(l)自生反应热力学AlTiB systemAl+2BAlB23Al+TiAl3TiAl3Ti+2BTiB2+3AlTi+2BTiB2自生反应热力学TiB4C systemChangeofGibbsfreeenergyGasatemperatureforthereactions5Ti+B4C4TiB+TiCand3Ti+B4C2TiB2+TiC,respectively5Ti+B4C4TiB+TiC3Ti+B4C2TiB2+TiC自生反应热力学TiTiB2 systemChangeofGibbsfreeenergyGandformationent
13、halpyHasatemperatureforthereactionTiB2+Ti2TiB自生陶瓷相的形成机理固溶-析出Al-Ti-CAl-Ti-BAl-CAl-B4C自生陶瓷相的形成机理固-液界面反应ForapowdermixtureofTiNandBTiN+2B+AlTiB2+AlNForthepowdermixtureofTiandB4C,Al3Tiisformedfirst,followedbyareactionbetweenAl3TiandB4C3Al3Ti+B4C2TiB2+TiC+9Al自生陶瓷相的形成机理熔体中固-固反应Ti2O3(s)+2AlB2(s)2TiB2(s)+-Al
14、2O3(s)3TiO2(s)+3AlB2(s)+Al(l)3TiB2(s)+2-Al2O3(s)自生复合材料的显微组织OpticalmicrographshowinguniformdistributionoffineAl2O3andTiB2particulatesinaluminummatrix.ThecompositewasfabricatedbytheRHProutefromTiO2AlBsystemExperimentalHRTEMimageoftheMgAl2O4/Alinterfaceinthe110projection高高导导热热材材料料和和电电子子封封装装材材料料HTCM Group谢谢大家谢谢大家 欢迎提问！欢迎提问！
