G0400504 Preparation of Vapor Grown Carbon Short Fiber/ Aluminum Composites by Rolling and its Thermal Conductivity

Abstract

Vapor grown carbon nano fiber (VGCF) dispersed Aluminum (Al) composites was prepared by two method; one is obtained by sintering after rolling of the mixed powders of aluminum particles and VGCF, and another is by rolling after sintering of the mixed powders. Relative density, fiber direction and the shape of aluminum particles in composites was estimated, and the relationship between these properties and the thermal conductivity was considered. VGCFs in composites became to array along the rolling direction by rolling. Furthermore, the aspect ratio of Al particles in composites and the relative density increased by rolling. But the thermal conductivity of the composites was not improved because of the aggregation of VGCF and the reaction products of Al_4C_3.