Uses the fiber where microstructure is controlled the fiber reinforced composite material

摘要

PROBLEM TO BE SOLVED: To obtain a lightweight composite material excellent in strength and toughness without changing its composition by reinforcing a metal by the use of respective pitch-based carbon fibers of radial structure, onion structure, or random structure, respectively. ;SOLUTION: Metals (Al, Ti, etc.), are reinforced by mixing by using respective pitch-based carbon fibers of radial structure (a structure where the carbon hexagonal net plane of a carbon fiber takes a radiate form with respect to the central axis of the fiber), onion structure (a structure where the carbon hexagonal net plane of a carbon fiber takes a concentrically circular form with respect to the central axis of the fiber), or random structure (a structure where the carbon hexagonal net plane of a carbon fiber takes a random form with respect to the central axis), respectively, or, metals are reinforced by mixing by using a carbon fiber where the crystal size of graphite crystallites is regulated to 7 to 18 nm Lc and to 0.340 to 0.345 nm d₀₀₂ or an amorphous SiC fiber containing the thrid elements, such as Ti and Zr, for inhibiting coarsening of crystal, respectively. Further, an infiltration process, an HIP process, a pressing process, etc., are used for reinforcing of the fiber and the metal by mixing.;COPYRIGHT: (C)1999,JPO