Al颗粒增强铝基复合材料.pdf

第38卷第6期仓扁学斌V0l38No．6
2002年6月602—608页ACTAMETALLURGICASINICAJun．2002PP602——608

通过基体合金化制备界面相容的A1zOsp／A1颗粒
增强铝基复合材料

李斗星周朝霞
(中国科学院金属研究所沈阳材料科学国家(联合)实验室，沈阳110016)
樊中云
(DepartmentofMaterialsPhysicsandChemistry,BrunelUniversity,UK)

摘要本文提出了通过基体台采化改良AI2Oa／A1界面润韫的思路，添加元素M必须满足以下两个条件(1)渣志金属表面
能1<7At：(2j氧化物Gibbs形成能AGM=o<&GinO。并在实验中得到验证Mg是良好的润湿增强剂，而且随Mg
古量的增加，浸润技果增强Bi、Pb和Li告金化在Mg的基础上进一步加强润湿，但Cu的加^效果相反在AI203／6061A1
复合材料中Mg偏析到界面．且在一定条件下生成界面反应产物Ik~gAl204但是在A12Oa／6262A1复合材料中富集Bi和
Pb的纳米颗粒存在于增强体之间或增强体内部孔隙．讨论r05,am或4,amA12Oa／6061AI和4ttmA12O3／6262A1复台
材料的力学性能与镦蝇结拊．
关键词A1203／A1复台材料，基体台盒化，热力学，Al2O3／A1界面．高分辩电镜观察
中围法分类号文献标识码A文章编号0412—1961(2002)06060208

A1203p／AlCOMPOSITESWITHCOMPATIBLEINTER—
FACEBYMATRIXALL0ⅥNG

Douxing．ZHOUZhaoxia
1)ShenyangNationalLaboratoryforMaterialsScience．1nstituteofMetalResearch．TheChineseAcademyofScienc~
Shenyang110016
FANZhon~：qun
2】DepartmentofMateriaIsPhysicsandChemistry．BruneIUniversity，UK
Cow-respondent：LIDouxing~professor,Tel：[phone]·55417,Fax：(024)~3891320,
E-raail：[e-mail]
SupportedbyNationalNaturalScienceFoundation0fChina(No59831020)
Manuscrip~receipted2加2一D409

ABSTRACTApproachtoimprovethewettabilityandadhesionbetweenA1203andAlbymatrix
alloyingwasproposedThea~oyingelementMwillhavetomeetbothofthefollowingrequirements：
(1)Itisabletoreducethesurfacetensionofmoltenaluminium，7M<l：(2)TheoxideofMhas
morenegativestandardfreeenergythanA1203．AGMo<AGA1OThisproposalhasbeenproved
．
experimentally．IthasbenrevealedthatMgenhancedwettingdramatically．Bi，PbandL；promoted
wettingfurtherinadditiontoMg，whereasCudepressedinfiltration．IthasbeenfoundthatMgwas
segregatedtotheA1203／A1interfaceinA1203／6061A1compositeandMgAluOaWasformedatthe
interfaceinsomecase．However．BiandPbrichnaarometerparticleswerefoundbetweenorinsideof
reinforcementinAI203／6262A1compositeThemechanicalpropertiesandmicrostructuresof0．5m
or4“mA12Os／6061A1and4“mA12Os／6262A1compositeswerealsodiscussed．
KEYw_0RDsA12Oar．／A1composites，matrixalloying，therm。dynamics，A1203／A1interface，
HRFM

陶瓷增强金属基复合材料综合