Microstructure and thermal properties of copper matrix composites reinforced with titanium-coated graphite fibers-中国期刊网

摘要 Milledformofmesophasepitch-basedgraphitefiberswerecoatedwithatitaniumlayerusingchemicalvapordepositiontechniqueandTi-coatedgraphitefiber/Cucompositeswerefabricatedbyhot-pressingsintering.ThecompositeswerecharacterizedwithX-raydiffraction,scanning/transmissionelectronmicroscopies,andbymea-suringthermalproperties,includingthermalconductivityandcoefficientofthermalexpansion(CTE).Theresultsshowthatthemilledfibersarepreferentiallyorientedinaplaneperpendiculartothepressingdirection,leadingtoanisotropicthermalpropertiesofthecomposites.TheTicoatingreactedwithgraphitefiberandformedacontinuousanduniformTiClayer.Thiscarbidelayerestablishesagoodmetallurgicalinterfacialbondinginthecomposites,whichcanimprovethethermalpropertieseffectively.Whenthefibercontentrangesfrom35vol%to50vol%,thein-planethermalconductivitiesofthecompositesincreasefrom383to407Wá(máK)-1,andthein-planeCTEsdecreasefrom9.5910-6to6.3910-6K-1.

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Microstructure and thermal properties of copper matrix composites reinforced with titanium-coated graphite fibers

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Microstructure and thermal properties of copper matrix composites reinforced with titanium-coated graphite fibers

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