Preparation method of light metal/boron carbide composite material

A preparation method of a light metal/boron carbide composite material, comprising:

• (A) providing a boron carbide precursor and a light metal powder to perform a pretreatment mixing process to form a precursor, wherein the light metal powder acts as a catalytic medium so that the boron carbide precursor is catalyzed by the light metal powder;
• (B) performing a vacuum cold isostatic pressing molding on the precursor to make the precursor form a light metal/boron carbide compound green body that is uniform;
• (C) performing a thermal treatment on the light metal/boron carbide compound green body to make the light metal/boron carbide compound green body form a light metal/boron carbide compound sintered body;
• and
• (D) performing a cold rolling treatment or a hot rolling treatment on the light metal/boron carbide compound sintered body to obtain a light metal/boron carbide composite material,
• wherein the carbide precursor includes a mixture of h-boron nitride and carbon black and/or a mixture of boron oxide and carbon black,
• wherein the boron carbide precursor comprises 1 wt % to 49 wt % of boron oxide and 0.1 to 4.9 wt % of carbon black, and/or 1 wt % to 49 wt % of h-boron nitride and 1 to 4.9 wt % of carbon black,
• wherein the light metal powder is selected from aluminum powder, magnesium powder and a combination thereof,
• wherein the cold isostatic pressing molding uses a molding pressure of more than or equal to 3000 kgf/cm2, and
• wherein the thermal treatment uses a vacuum microwave irradiation or a vacuum thermal treatment temperature of more than or equal to 600° C.