208 カーボンナノプリフォームの諸特性

概要

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In order to develop metal composites reinforced by vapor grown carbon fibers (VGCF) with an average diameter of 150nm and aspect ratio of 10-500,porous VGCF-carbon (C) preforms were fabricated by carbonizing VGCF-phenol resin (PF) compacts. If the VGCF/PF compacts were carbonized at 3000℃ for 3600s in argon gas atmosphere, two or three dimensional VGCF networks highly connected by carbon were formed in VGCF/C performs with 19.3-38.2vol% VGCF and 44.9-76.5vol% void. The VGCF/C preforms achieved an excellent balance of high thermal conductivity of 0.407W/cm・K and low electrical resistivity of 0.003Ω・・cm at room temperature which are higher than thermal conductivity of titanium (0.20W/cm・K) and lower than volume resistivity of carbon black (about 0.01Ω・cm). VGCF content dependence of thermal conductivity and volume resistivity of the VGCF/C preforms were discussed through perfection of network structure.
社団法人日本機械学会の論文
2003-09-23