Composite metal material and method of producing the same

1. A method of producing a composite metal material, the method comprising:

(a) mixing an elastomer and filler particles to obtain a composite material; and

(b) mixing the composite material and a metal to obtain a composite metal material in which the filler particles are uniformly dispersed in the metal;

wherein:

a network component of the elastomer in a noncrosslinked form has a spin-spin relaxation time (T 2 n) measured at 30° C. by a Hahn-echo method using a pulsed nuclear magnetic resonance (NMR) technique of 100 to 3,000 μsec.

2. The method according to claim 1 , wherein:

step (b) includes decomposing and removing the elastomer in the composite material when mixing the composite material and the metal.

3. The method according to claim 1 , wherein:

step (a) includes mixing and dispersing the filler particles in the elastomer by a shear force.

4. The method according to claim 1 , wherein:

step (b) includes powder-forming the composite material.

5. The method according to claim 1 , wherein:

step (b) includes mixing the composite material and the metal in a fluid state, and causing the mixture to solidify.

6. The method according to claim 1 , wherein:

step (b) includes melting the metal and causing the molten metal to permeate the composite material to replace the elastomer with the molten metal.

7. The method according to claim 1 , wherein the filler particles are metal filler particles.

8. The method according to claim 1 , wherein the filler particles are nonmetal filler particles.

9. The method according to claim 8 , wherein the nonmetal filler particles are ceramic filler particles.

10. The method according to claim 1 , wherein the elastomer has a molecular weight of 5,000 to 5,000,000.

11. The method according to claim 1 , wherein:

at least one of a main chain, a side chain, and a terminal chain of the elastomer includes at least one of a double bond, a triple bond, an α-hydrogen, a carbonyl group, a carboxyl group, a hydroxyl group, an amino group, a nitrile group, a ketone group, an amide group, an epoxy group, an ester group, a vinyl group, a halogen group, a urethane group, a biuret group, an allophanate group, and a urea group.

12. The method according to claim 1 , wherein:

a network component of the elastomer in a crosslinked form has a spin-spin relaxation time (T 2 n) measured at 30° C. by a Hahn-echo method using a pulsed nuclear magnetic resonance (NMR) technique of 100 to 2,000 μsec.

13. The method according to claim 1 , wherein the metal is aluminum or an aluminum alloy.

14. A composite metal material obtained by the method as defined in claim 1 .