Fabrication of W–Cu functionally graded material by spark plasma sintering method

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Publication date
5 September 2013
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Abstract

Three-layered(W–25Cu/W–50Cu/W–75Cu,volumefraction)W/Cufunctionallygradedmaterial(FGM)was synthesizedbysparkplasmasintering(SPS)atdifferenttemperaturesfor5minunderaloadof40MPa.The in？uencesofdifferentsinteringprocessesonrelativedensity,hardness,thermalconductivityandmicrostructure atvariouslayersofsinteredsampleswereinvestigated.Theexperimentalresultsindicatedthatthegraded structureofthecompositecouldbewelldensi？edaftertheSPSprocess.Therelativedensityincreasedwith theincrementofsinteringtemperatureanditwasupto96.53%assinteredat1050°C.Inaddition,thethermal conductivityreached140W/m·Katroomtemperatureand151W/m·Kat800°C,whichcouldbeascribedto thespeci？cstructurethatWparticlesenwrappedbynet-likeCu.AndtheVickershardnesswasconverted from4.11to4.68GPa

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