铸造氧化铝_锌合金复合材料界面的SEM观察

/SEMX(,341000):/,(SEM),,,/,::TB331:A:0258-7076(2001)05-0378-04,,,,,,[1],/,,,/[24],,/,,/180%()Al2O3,SiO2;35m,220mm,PS262(ICP2AEC),():410%Al,219%Cu,0103%Mg,Zn/,,10MPa;,15%/,,X265021/,,,/2/()(+)(++),,[5],,,33,,255Vol.25.5CHINESEJOURNALOFRAREMETALS20019September2001X:2000210218;,,1958,,;:,,,;,,,/1Fig.1Distributionoffibersincomposite2Fig.2Solidifyingstructuresofcomposite3/(a);(b)Fig.3InterfaceofAl2O3/Znalloycomposite,/(4),,(,5),,[24],/,,/,;,,1,,;()6164%(),,SiO2[6],/,/,9735/SEM/4Fig.4Interfacereactionincomposite5Fig.5Growthofsomephaseonsurfaceofaluminafiber1Table1ResultsofEDS()()w/%y/%w/%y/%w/%y/%w/%y/%AlK7017171171741787515338168571123619658166SiK2912928147251222414761649142--CuK----7197510041102176ZnK----461702814658193381583/,,,,,,/2Al2O3,4(Al2O3SiO2)[6],,,2Al2O3,[1],2Al2O3,(3(a)5),,,,[6]:[1],/,,,,,,/,,,/,,[4,6]4Al+3SiO2=2Al2O3+3Si(1)2Mg+SiO2=2MgO+Si(2),,,/[7],08325,,/,:,[6],(372)(577),(1),,,(),,,,(),,,,,,2,,/,/,411/,,21,/,,31:,1,,1,1992,9(3):952LeviCG,AbbaschianGJ,MehrabianRetal.Metall.Trans.,1978,9A:6973FishkisM.J.Mater.Sci.,1991,26:26514,,1,1991,8(4):15,,1.:,1994,5166,1,1990,7(2):317MortensenA,CornieJA,FlemingsMCetal.Metall.Trans.,1988,19A:709SEMObservationonInterfacesofCastAl2O3/ZnAlloyCompositesLiuZheng,LiuXiaomei,ZhuYingluandChenCigao(SouthernInstituteofMetallurgy,Ganzhou341000,China)Abstract:Alumina/Zincalloycompsitesweremanufacturedbysqueezecasting,andtheinterfacesofthecompositewereobservedonscanningelectronicmicroscope(SEM).Theresultsindicatethatthereisthefineandcloseinterfacebe2tweenthefiberandthematrix,andthatalloyelementscanimprovecombinationbetweenthefiberandthematrixinthecomposites.Duringthesolidificationofthecomposites,thesiliconontheinterfacebetweenthefiberandthematrixplaysaleadingroleduringthecoupledgrowthoftheeutecticsothattheeutectictransformationofthecompositesconsistsofAl2SieutectictransformationandZn2Aleutectictransformation.KeyWords:Composite,Zincalloy,Silicon,Aluminafiber,Interface1835/SEM