Method for manufacturing material for forming composite metal and method for manufacturing article formed from composite metal

A method for manufacturing a composite-metal-forming material, comprising the steps of:

• preparing a metal material having a Mg alloy or an Al alloy;
• preparing, as an additive material, a metal-deposited carbon nanomaterial formed by causing a carbide-forming element that contains an element that reacts with carbon and that forms a compound, to adhere to a surface of a carbon nanomaterial;
• heating the metal material to a temperature in a region where a solid and a liquid are both present to thereby yield a semi-molten metal material in a semi-molten state;
• introducing the additive material to the semi-molten metal material and performing kneading to obtain a composite metal material;
• and
• heating the composite metal material to a solution temperature of the metal material and performing a solution treatment to thereby yield a composite-metal-forming material.

A method for manufacturing a composite-metal-made article, comprising the steps of:

• preparing a metal material having a Mg alloy or an Al alloy;
• preparing, as an additive material, a carbon nano-composite material formed by mixing a carbon nanomaterial and a metal powder to obtain a carbon nano-composite metal powder, compacting the carbon nano-composite metal powder into a solid to obtain a preform, heating the preform in a vacuum, inert gas, or non-oxidizing gas atmosphere to a temperature in a region where a solid and a liquid are both present, and applying pressure to the heated preform;
• heating the metal material to a temperature in a region where a solid and a liquid are both present to thereby yield a semi-molten metal material in a semi-molten state;
• introducing the additive material to the semi-molten metal material and performing kneading to obtain a composite metal material;
• heating the composite metal material to a solution temperature of the metal material and performing a solution treatment to thereby yield a composite-metal-forming material;
• supplying the composite-metal-forming material into an injection forming machine and heating the composite-metal-forming material to a semi-molten state in the injection forming machine;
• and
• supplying the composite-metal-forming material in the semi-molten state into a cavity of a die to obtain a composite-metal-made article.

A method for manufacturing a composite-metal-made article, comprising the steps of:

• preparing a metal material having a Mg alloy or an Al alloy;
• preparing, as an additive material, a metal-deposited carbon nanomaterial formed by causing a carbide-forming element that contains an element that reacts with carbon and that forms a compound, to adhere to a surface of a carbon nanomaterial;
• heating the metal material to a temperature in a region where a solid and a liquid are both present to thereby yield a semi-molten metal material in a semi-molten state;
• introducing the additive material to the semi-molten metal material and performing kneading to obtain a composite metal material;
• heating the composite metal material to a solution temperature of the metal material and performing a solution treatment to thereby yield a composite-metal-forming material;
• supplying the composite-metal-forming material into an injection forming machine and heating the composite-metal-forming material to a semi-molten state in the injection forming machine;
• and
• supplying the composite-metal-forming material in the semi-molten state into a cavity of a die to obtain a composite-metal-made article.