Abstract: An aluminum-based composite material includes a plurality of coarse crystalline grains (3) of pure aluminum, and a plurality of fine crystalline grains (4) each having an aluminum matrix (1), and a dispersion material (2) dispersed inside the aluminum matrix and formed by reacting a portion or all of an additive with aluminum in the aluminum matrix. The fine crystalline grains exist among the coarse crystalline grains, and the fine crystalline grains have crystalline grain diameters smaller than crystalline grain diameters of the coarse crystalline grains.

Abstract: An aluminum-based composite material includes an aluminum parent phase, and stick-shaped or needle-shaped dispersive matter of aluminum carbide dispersed in the aluminum parent phase. A method of manufacturing the aluminum-based composite material includes a step of mixing aluminum powder having a purity of 99% by mass or higher with a stick-shaped or needle-shaped carbon material, and pressing and molding a resulting mixture, so as to prepare a compacted powder body. The manufacturing method further includes a step of heating the compacted powder body at 600C to 660C to react the carbon material with aluminum in the aluminum powder, so as to disperse the stick-shaped or needle-shaped dispersive matter of aluminum carbide in the aluminum parent phase.

Abstract: An aluminum based composite material includes an aluminum parent phase and dispersions dispersed in the aluminum parent phase and formed such that a portion or all of additives react with aluminum in the aluminum parent phase, an average particle diameter of the dispersions is 20 nm or less, a content of the dispersions is 0.25% by mass or more and 0.72% by mass or less in terms of carbon amount, and an interval between the dispersions adjacent to each other is 210 nm or less.

Abstract: An aluminum-based composite material includes a plurality of coarse crystalline grains (3) of pure aluminum, and a plurality of fine crystalline grains (4) each having an aluminum matrix (1), and a dispersion material (2) dispersed inside the aluminum matrix and formed by reacting a portion or all of an additive with aluminum in the aluminum matrix. The fine crystalline grains exist among the coarse crystalline grains, and the fine crystalline grains have crystalline grain diameters smaller than crystalline grain diameters of the coarse crystalline grains.

Abstract: An aluminum based composite material includes an aluminum parent phase and dispersions dispersed in the aluminum parent phase and formed such that a portion or all of additives react with aluminum in the aluminum parent phase, an average particle diameter of the dispersions is 20 nm or less, a content of the dispersions is 0.25% by mass or more and 0.72% by mass or less in terms of carbon amount, and an interval between the dispersions adjacent to each other is 210 nm or less.

Abstract: An aluminum-based composite material includes a plurality of coarse crystalline grains (3) of pure aluminum, and a plurality of fine crystalline grains (4) each having an aluminum matrix (1), and a dispersion material (2) dispersed inside the aluminum matrix and formed by reacting a portion or all of an additive with aluminum in the aluminum matrix. The fine crystalline grains exist among the coarse crystalline grains, and the fine crystalline grains have crystalline grain diameters smaller than crystalline grain diameters of the coarse crystalline grains.

Abstract: An aluminum-based composite material includes an aluminum parent phase, and stick-shaped or needle-shaped dispersive matter of aluminum carbide dispersed in the aluminum parent phase. A method of manufacturing the aluminum-based composite material includes a step of mixing aluminum powder having a purity of 99% by mass or higher with a stick-shaped or needle-shaped carbon material, and pressing and molding a resulting mixture, so as to prepare a compacted powder body. The manufacturing method further includes a step of heating the compacted powder body at 600C to 660C to react the carbon material with aluminum in the aluminum powder, so as to disperse the stick-shaped or needle-shaped dispersive matter of aluminum carbide in the aluminum parent phase.