Al-Al-,2-O-,3-陶瓷基復(fù)合材料偽半固態(tài)觸變成形的研究.pdf

1、哈爾濱工業(yè)大學(xué)碩士學(xué)位論文AlAlO陶瓷基復(fù)合材料偽半固態(tài)觸變成形的研究姓名：王晶申請學(xué)位級別：碩士專業(yè)：材料加工工程指導(dǎo)教師：杜之明20050601AbstractTheA1／A1203ceramicsmatrixcompositehasmanygoodpropertiessuchaslittlespecificdensityhightemperatureresistant，abrasionresistantandthermalsho

2、ckresistance，andSOonButitsinherentbrittlenesslimitsitsapplicationTheappearanceOfthesemisolidprocess(ssP)，whichhappenedinthe1970’S，providesthe：promisinglongtermpotentialforthepreparationandformingofnotonlythemetalmatrixco

3、mpositesbutalsotheceramicsmatrixcompositesInthispaperthepseudo—semisolidprocess(PSSP)，whichcombinesthesemisolidprocessandthepowdersinteringprocess，hasbeenusedtomakeuptheAI／A1203ceramicsmatrixcompositesandformthecupshellT

4、heprocesseswhilethixoforminginthepseudosemisolidstate，liketheproductionofbillets，thethixoformingofthecupshellandthemechanicalbehaviorshavebeenwellstudiedtheoreticallyandexperimentallyInthispaperapseudosemisolidcompaction

5、technologybasedonpowdermetallurgyhasbeenusedtofabricateA1／A1203ceramicsmatrixcompositesWiththehelpofthethreepointbendingtestandopticalmicroscope，theinterphase’SincorporationoftheA1／A1203ceramicsmatrixcompositesindifferen

6、ttemperaturewasstudiedandtheinfluenceofthetemperatureontheinterfacewettabilityoftheA1／A1203ceramicsmatrixcompositeshasbeeninvestigatedThisprovidesareliablebasisfortlerationaldeterminationofhotpressingparametersAtlast，the

7、A1／A120aceramicsmatrixcomposites，whichhascompactstructureandgoodproperties，hasbeenmadeupBycompressiontestinpseudo—semisoliclstate，themechanicalbehaviorsofA1／A1203ceramicsmatrixcompositesinpseudosemisolidstatehavebeenexpe

8、rimentallyinvestigatedThechangeofthecomposites’flowstressinpseudosemisolidstateandtheinfluenceoftemperatureandstrainrateondeformationresistanceofcompositeshavebeenmadeclearThisalsoprovidesnecessarytheoreticalbasisandexpe