| 【文章摘要】 Al-graphite composites have been successfully fabricated by a hot-extrusion technique.Sound extrudates can be obtained when graphite content(volume fraction)is less than 40%.T he graphite tends to be aligned along the extrusion direction,due to the deformation of graphite along its basal planes during extrusion.The orientation degree of graphite in the extrusion direction is enhanced with decreasing graphite content and extrusion temperature.The preferred orientation of graphite results in an anisotropy of thermal conductivity in the extruded samples.The incorporation of large sizes of graphite flakes is beneficial to improving the thermal conductivity of extruded Al-graphite composites. |