High Strength And High Electrical Conductivity Of Al <sub> 2 </ Sub> The O <sub> 3 </ Sub> / Cu Composites

High strength and high conductivity AI。Os／Cu composites has considerablem毗etpote血且al for its excellentpr卯ertles． Among vanous趾rlcatlon methods ofthis composite, Internal oxldatlon Is a good w盯 to obtain Alzos／Cu composites withbest qualities． B呶 so趾 this method has some dr蛐acks such as complicated趾rlcatlon, high cost and so on． D solve this problem, In this thesis, a reseaxch onfabrication ofAlzos／Cu composites by Internal oxldatlon has been camed o帆 onthebasis oftheoretlcal and experlmepal analyses． (1) Based on improving various lllternal oxldatlon method, a set ofnewfabrication process has been developed with Oz as oxidative agent,比 as reductlveagent and Is suitable for Industrialized production ofAlzos／Cu composites． Saxnplesof AIZO3／Cu composites have been fabricated and its mlcrostrUcture and propertiesare tested, The results show that A12O3 particles are tiny and well－distributed Theproperties ofsmpks are excuent． (2) The thermodynamics and kinetics ofllltemal oxidatlon have been studied．The results show that reaction tempera败e,pl co血e血In alloy and re肌tlon time aremalnparameters Influencinglnternal oxldatlon, whlchprovldetheoretlcal basis fordetermining fabncatlon parameters and are tested by experlme血乙 (3) ThC StTCflgthClllflg ffiCChdri1Sffi apd plAstiC dCfoUllat1Ofi OfA12O3／CUCOmpOSiteS h。e bCCll。。lyZed． ThC lflflueflCe Of A12O3 pedlCIC SIZC Oil thC StICllgthofAlzos／Cu composites has also been studied and its theoretical properties beencalculated, (4) The properties ofpreforms and sintered samples aregreatlylmproved bybetteringthe processes ofpowderpressing讪 sl血ering． The analysis of＊theis e肚ct ofplastic wo"ng on the micros响cture andprop"ies ofAlzoyCu comPosites shows山成 foyglflgAnd CXtfudlllg atC gOOdW缈S to Obt81flhlghqU8lltyA12O3／CU COffipOSltCS．...