METAL-BASED COMPOSITE MATERIAL CONTAINING BOTH MICRO-SIZED CARBON FIBER AND NANO-SIZED CARBON FIBER

摘要

Disclosed is a metal-based carbon fiber composite material improved in thermal expansion rate and thermal conductivity and having light weight. The composite material comprises a metal and carbon fibers comprising micron carbon fibers and nanofiber and has a first surface. The micron carbon fibers are oriented in a direction parallel to the first surface and run from one end to the other end continuously. 80% of the nanofibers are oriented at an angle within 30° with respect to the first surface. In the surface parallel to the first surface, the nanofibers are oriented randomly. In the surface area of the composite material, the micron carbon fibers may be present in a less amount than that in other area or no carbon fiber may be present. In the composite material, the nanofibers may be oriented in a direction parallel to the surface of the composite material. Also disclosed is a method for production of the composite material.