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1、Transientliquidphasediffusionbondingof6061-15wt%SiCpinargonenvironmentJ.Maitya,?,T.K.Palb,R.MaiticaDepartmentofMetallurgicalandMaterialsEngineering,NationalInstituteofTechnology,Durgapur,Durgapur713209,WestBengal,IndiabWeldingTechnologyCenter,DepartmentofMetallurgicalandMaterialEngineering,
2、JadavpurUniversity,Kolkata700032,WestBengal,IndiacCentralResearchFacility,IndianInstituteofTechnology,Kharagpur721302,WestBengal,IndiaAbstractExtruded6061-15wt%SiCpcompositewasjoinedbytransientliquidphasediffusion(TLPD)bondingprocessinargonenvironmentusing50-_mthickcopperfoilinterlayer.Theb
3、ondingwascarriedoutat560?Cwithtwodifferentappliedpressures(0.1and0.2MPa)andfivedifferentholdingtimes(20min,1,2,3and6h).Kineticsofthebondingprocesswassignificantlyacceleratedinthepresenceofreinforcement(SiC).Thisaccelerationisattributedtotheincreasedsolutediffusivitythroughdefect-richSiCpart
4、icle/matrixinterfaceandporosity.Adequatebondstrength(90%oftheoriginalcompositestrength)wasachievedforbondingat0.2MPapressurewith6hofholding.Thisisveryclosetothereportedhighestbondstrengthachieved(92%oftheoriginalcompositestrength)forjoiningaluminium-basedmetalmatrixcompositebyTLPDprocessinv
5、acuumfollowedbyisostaticpressing.Therejectionofoxideatperipheryoncompletionofisothermalsolidification,andeliminationofvoidatbondinterfacethroughsolidstatediffusionathigherpressure(0.2MPa)werethemainreasonsofachievinghighbondstrength.Keywords:Transientliquidphasediffusion;Bonding;6061-SiCpco
6、mposite;Particlesegregation;Isothermalsolidification;Oxidation;Bondstrength氬氣氛圍中6061-15%(wt)SiCp的瞬時液相擴散連接J.Maitya,*,T.K.Palb,R.Maitica印度,西孟加拉邦,杜爾加布爾713209研究所,冶金與材料工程技術(shù)系;b印度,西孟加拉邦,加爾各答700032研究所,賈普達大學,冶金與材料工程系,焊接技術(shù)中心;c印度,西孟加拉邦,克勒格布爾721302研究所,印度理工學院,核心研究機構(gòu);摘要:在氬氣氛圍中通過液相擴散連接項目,用50um厚的銅箔層擠壓6061-
7、15wt%SiCp復(fù)合材料使他們結(jié)合。在560℃,兩種不同壓力(0.1和0.2MPa)和五種不同保溫時間(20min,1,2,3和6小時)下實施這次連接。增強相(SiC)的存在顯著加快連接工藝的動力學問題。加速的原因在于SiC顆粒/基體界面的大量缺陷和氣孔導致溶質(zhì)的擴散加快。在0.2MPa,保溫時間為6h情況下達到了充足的粘結(jié)強度(原始復(fù)合強度的90%)。這是非常接近于所報道過的,在真空等靜壓狀態(tài)下依靠TLPD過程實現(xiàn)鋁基金屬基復(fù)合材料的連接獲得的最高粘結(jié)強度(原始復(fù)合強度的92%)。隔絕氧化,在外圍形