Zn-Fe及Zn-Fe-Si固态扩散偶中金属间化合物的生长

18920089Vol.18No.9TheChineseJournalofNonferrousMetalsSep.20081004-0609(2008)09-1639-06Zn/FeZn/Fe-Si1,22122(1.4100832.411105)Zn/FeZn/Fe-Si38530~300minZn/Feδζδδζ300mindζ/dδ0Zn/Fe-Siζδζζδδ3Zn-FeTG113.1TG111.6AGrowthofintermetalliccompoundsinsolidZn/FeandZn/Fe-SidiffusioncouplesLIZhi1,2,SUXu-ping2,HEYue-hui1,TANZheng2,YINFu-cheng2(1.StateKeyLaboratoryofPowderMetallurgy,CentralSouthUniversity,Changsha410083,China2.KeyLaboratoryofMaterialsDesignandPreparationTechnologyofHunanProvince,XiangtanUniversity,Xiangtan411105,China)Abstract:ThegrowthofZn-FeintermetalliccompoundsandtheeffectofSiwerestudiedbymeansofdiffusionexperimentsat385for30−300min.TheresultsshowthatthediffusionlayersismainlycomposedofδphaseinZn/Fecouples,theinterfacebetweenζandδphasesisplanar,thethicknessofδphaseincreasesandζphasedecreaseswithtime,dζ/dδiszeroat300min.InZn/Fe-Sicouple,thediffusionlayersismainlycomposedofζphase,δphaseprotrudesintoζphaseinislandshape,andthesiliconinironpromotesthegrowthofζphaseandrestrainsthegrowthofδphaseintheinitialperiod,δphaseincreaseslinearlywiththeincreaseoftimeinthelaterperiod.Thegrowthofthetotallayerinthreecouplesisdiffusion-controlled.Keywords:Zn-Feintermetalliccompounds;diffusioncouple;microstructure;growthkinetics(Sandelin)ζ[1−2]Zn-Fe[1,3−5]KOZDRAS[1]SiΓSiGUTTMAN[5]SiζζζFOCT[3][4]Zn-Fe-Si450(5067108850771098)(05JJ40091)2007-11-142008-05-3013974870264E-mail:[e-mail]200891640[6−9][10−11]Sandelin−[12−14]Zn-FeWAKAMATSU[13]SYAHBUDDIN[14]Zn/FeZn-Al/FeLICHTI[15]Fe/ζ(FeZn13)/Fe-1.3%SiZn-Fe0.1%0.3%[16−17]0.1%0.3%Zn-Fe199.9%99.99%40g80030d99.995%3mm3mm2mm[18]Zn/FeZn/Fe-SiSK−4−1038530~300minJSM−6360LVOXFORDINCAEPMA−160022.1Zn-Fe[19−20]SU[21]ζ(FeZn13)δ(FeZn10)Г1(Fe5Zn21)Г(Fe3Zn10)4JORDAN[22]4505~300sZn/FeZn-Feζ-FeZn13δ-FeZn730sΓ-Fe3Zn10[23]45060~600sZn-FeΓZnFeFe-Si385Zn-FeZn/FeZn/Fe-Si38530~300min113385EDSEPMA5118.5%~12.0%6.5%~7.5%Zn-Feδζ[14,24]δζ13Table1CompositionofphasesinthreediffusioncouplesSampleElementMassfraction/%Molefraction/%PhaseFe5.836.75Zn94.1793.25ζFe8.269.53Zn/FeZn91.7490.47δFe5.646.54Zn94.3693.46ζFe9.3410.76Zn/Fe-0.1%SiZn90.6689.24δFe6.026.98Zn93.9893.02ζFe8.239.50Zn/Fe-0.3%SiZn91.7790.50δZn/Feζδ30minζζδ300minζδ189Zn/FeZn/Fe-Si16411385Zn-FeSEMFig.1SEMimagesofZn-Feintermetalliccompoundsindiffusioncoupleafterannealingat385fordifferenttimes:(a)Zn/Fe,30min;(b)Zn/Fe-0.1%Si,30min;(c)Zn/Fe-0.3%Si,30min;(d)Zn/Fe,60min;(e)Zn/Fe-0.1%Si,60min;(f)Zn/Fe-0.3%Si,60min;(g)Zn/Fe,120min;(h)Zn/Fe-0.1%Si,120min;(i)Zn/Fe-0.3%Si,120min;(j)Zn/Fe,300min;(k)Zn/Fe-0.1%Si,300min;(l)Zn/Fe-0.3%Si,300minZn/Fe-Si30minζδ1~2µm2~3µmζδδ300minδ2Zn-Fe-Si450WANG[25]SU[4]Zn-Fe-SiZn-Fe-Si405450Zn-Fe-Si450[26]()(Tie-line)(w(Si)0.06%)4Zn/Feζδ(21)200891642(w(Si)0.06%)ζ/ζδ0.5%[27]ζδtieline(22)δζ2Zn-Fe-Si450Fig.2Schematicdiagramofdiffusionpathin450isothermalsectionofZn-Fe-Siternaryphase[26]2.2Zn-FeZn-FeZn/FeZn/Fe-0.1%SiZn/Fe-0.3%Si38530~300minζδ233230minZn/Feζδ1Zn/Fe-0.1%Sidζ/dδ1423dζ/dδTable2dζ/dδinthreediffusioncouplefordifferentannealingtimesdζ/dδt/minZn/FeZn/Fe-0.1%SiZn/Fe-0.3%Si301.2213.748.81401.2710.097.72601.097.886.381200.144.934.5530002.111.7533385ζδFig.3Interdiffusionzonethicknesskineticsinthreecouplesafterannealingat385:(a)ζphase;(b)δphase;(c)TotaldiffusionZn/Fe-0.3%Sidζ/dδ8.8Zn/Fe-SiζδζδZn/Feδδζ189Zn/FeZn/Fe-Si164340min300mindζ/dδ0ζδζZn/Fe-Siζδζδdζ/dδ1Zn/FeZn/Fe-SiζδZn/Fe-0.3%SiZn/Fe-0.1%Siζδdζ/dδ0.1%ζ0.3%HORSTMANN[28]200dtd=ktn(kn)n0.5n1.0n333ζδnTable3Valueofnofζ,δandtotaldiffusioninthreecouplesnSpecimenζphaseδphaseTotaldiffusionZn/Fe−0.590.120.240.03Zn/Fe-0.1%Si0.180.011.000.020.320.01Zn/Fe-0.3%Si0.180.020.990.060.340.02δn0.59δδ/ζζnζζSi/ζδδδSiSiδFeδδ30.1%0.3%Siδn1δζδ3n0.5Zn/FeZn/Fe-SiZn-FeSiζδδSi31)Zn/Feζδζδδζ300minζδ2)Zn/Fe-SiζδζδζδSiζδδ3)Zn/Fe-0.3%SiZn/Fe-0.1%SiζδζREFERENCES[1]KOZDRASMS,NIESSENP.Silicon-induceddestabilizationofgalvanizedcoatingsintheSandelinpeakregion[J].Metallography,1989,22(3):253−267.[2].Sandelin.:,2005:12−18.CHEChun-shan.ResearchontheSandelineffectmechanismanditsrestrainsmethod[D].Guangzhou:SouthChinaUniversityofTechnology,2005:12−18.[3]FOCTJ,PERROTP,REUMONTG.Interpretationoftheroleofsilicononthegalvanizingreactionbasedonkinetics,morphologyandthermodynamics[J].ScriptaMetallurgica,1993,28(10):1195−1200.[4]SUXu-ping,TANGNY,TOGURIJM.450isothermalsectionoftheFe-Zn-Siternaryphasediagram[J].CanadianMetallurgicalQuarterly,2001,40(3):377−384.[5]GUTTMANH,NIESSENP.Reactivityofsiliconsteelsinhot-dipgalvanizing[J].CanadianMetallurgicalQuarterly,1972,11(3):609−612.[6]LUJin-tang,CHEChun-shan,KONGGang,XUQiao-yu,CHENJin-hong.Influenceofsilicononthegalvanizedcoatings200891644ofreactivesteels[J].JournalofMaterialsScienceandEngineering,2005,23(6):822−824.[7]CHEChun-shan,LUJin-tang,KONGGang,XUQiao-yu,CHENJin-hong.Influenceofsiliconinsteelsongalvanizedcoatings[J].ActaMetallurgicaSinica,2006,19(2):85−90.[8]TANGNY.Siliconingalvanizing[C]//AssociationforIronandSteelTechnology.6thInternationalConferenceonZincandZincAlloyCoatedSheetSteels:Galvatech04ConferenceProceedings.Chicago:AIST,2004:684−690.[9]ASTORREA,BREVAGLIERIB,CEC