Metal-carbon composite material and method for producing same

Abstract

Provided are a metal-carbon composite material having good workability and a high carbon content and a method for producing the same. The metal-carbon composite material 1 includes a continuous metallic phase 3 and a plurality of carbon particles 2 dispersed in the metallic phase 3. The carbon content in the metal-carbon composite material 1 is 50% or more by volume.

1 . A metal-carbon composite material including:
 a continuous metallic phase; and   carbon particles dispersed in the metallic phase,   wherein the metal-carbon composite material has a carbon content of 50% or more by volume.   
     
     
         2 . The metal-carbon composite material according to  claim 1 , wherein the metallic phase is constituted by at least one selected from the group consisting of Al, Cu, Ag, Ni, Bi, Sb, and an alloy containing at least one of these metals. 
     
     
         3 . The metal-carbon composite material according to  claim 1 , wherein the metallic phase has a thickness of 10 nm to 100 μm. 
     
     
         4 . The metal-carbon composite material according to  claim 1 , wherein the carbon particles have a particle size in a range of 50 nm to 500 μm. 
     
     
         5 . A method for producing a metal-carbon composite material, comprising the steps of:
 mixing metal particles and carbon particles to obtain a mixture containing the carbon particles with the metal particles attached to the surfaces of the carbon particles;   forming the mixture to obtain a green body; and   firing the green body.   
     
     
         6 . The method for producing a metal-carbon composite material according to  claim 5 , wherein in the mixing step a binder is further mixed. 
     
     
         7 . The method for producing a metal-carbon composite material according to  claim 5 , wherein the metal particles have a particle size in a range of 1/100 to ⅕ of a particle size of the carbon particles. 
     
     
         8 . The method for producing a metal-carbon composite material according to  claim 5 , wherein the forming of the mixture is implemented by cold isostatic pressing.