文档介绍：第26卷第5期 2002年5月机械。【程材料 Materials for Mechanical Engineeri“g Mav 2002 DSC法研究Mullite/Al—Cu—Mg复合材料及其基体合金的时效析出行为李伟。龙剑平,,涂铭旌(四川大学制造科学与工程学院,四川成都610065) 摘要:用差示扫描量热仪(r)sC) (Mulllte)纤维增强Al一。结果表明:Mullite/ — ,,表明纤维推迟和抑制了GPB区的形成。S,’相和S 7的析出由于纤维的引入而得到明显加快,放热峰值温度降低,激活能减小,时效析出过程加快。关键词:差示扫描量热仪;莫来石纤维;铝铜镁合金;复合材料;时效析出中圈分类号:T瑚33 文献标识码:A 文章编号:1000 3738(2002)05一ool2一03 DSC Study on theAge-precipitation BehaViour ofMullite/Al—Cu-Mg C岫posite and ItsMOnoIithicMatrix Allov L1wei,LoNG JiaI卜ping,sHEN Ba俨luo,GAo shen利i,Tu Min酣ing (Sichuan University,Chengdu 6l0065,China) Abstract:.I、he ag}precipitation behaviour ofAl 85Mg alloy mu【1iteshor{“bre reinfo"ed A卜 )osjte has been studLd hy means of diffefential s旧nnjngcalorhetry‘DS(二).11 shown that DSC 1he丌rlograrns of a8 quenched c。mpos“e kqujte mfferent fmm thatofthe asquench甜nlonoIilhic mat打x onsn and dissolutlon ofGPB∞ne fomlationIs clearly obsen’ed on theDSC curves ofIhe m8trlx alloy,I】ut hardlydet蜘nined on【he I)SC curves oftheMullit/ 1-poslte,whlch indlcates thatmulllte m bre delays or suppresses GPB zone fomatioTL The precipltation ofg’andS’phasesk拼e】erar甜due tothejntmdllr— tionofmuflite fibres,resultlng rhedecrease ofpeak temperature and activatj。n ener