Brake disc and preparation method, brake system, and vehicle

A manufacturing method for a brake disc, comprising:

• immersing a carbon fiber tow in a solution of first resin, taking out the carbon fiber tow, and drying, curing, and cutting the carbon fiber tow, to obtain carbon fiber-reinforced resin strips;
• heating and pressurizing a first raw material comprising carbon particles and second resin powder in a mold for curing, and then crushing and sieving the first raw material to obtain a granular second raw material;
• mixing, heating, and stirring the carbon fiber-reinforced resin strips, the second raw material, third resin powder, and a solvent until the solvent volatilizes, to obtain a mixture;
• and crushing and sieving the mixture, transferring the mixture to a mold, and heating and pressurizing the mixture for curing, to obtain a brake disc blank, wherein the brake disc blank comprises a first material distribution area and a plurality of second material distribution areas spaced apart in the first material distribution area, the first material distribution area comprises the carbon fiber-reinforced resin strips and the third resin powder, and the second material distribution area comprises the second raw material and the third resin powder;
• and
• performing carbonization treatment on the brake disc blank under a protective atmosphere, and performing siliconizing treatment, to obtain the brake disc;
• wherein the brake disc comprises a dense area and a plurality of nanoporous areas spaced apart in the dense area, the dense area comprises a carbon fiber-reinforced silicon carbide material, the nanoporous area comprises pyrolytic carbon in a continuous phase and carbon particles distributed in the pyrolytic carbon, a pore size of the nanoporous area ranges from about 10 nm to about 100 nm, and porosity of the nanoporous area ranges from about 15% to about 30%.

A braking system having a brake disc, the brake disc comprising:

• a dense area;
• and
• a plurality of nanoporous areas spaced apart in the dense area;
• wherein the dense area comprises a carbon fiber-reinforced silicon carbide material, the nanoporous area comprises pyrolytic carbon in a continuous phase and carbon particles distributed in the pyrolytic carbon, a pore size of the nanoporous area ranges from about 10 nm to about 100 nm, and porosity of the nanoporous area ranges from about 15% to about 30%.

A transportation means including a braking system having a brake disc, the brake disc comprising:

• a dense area;
• and
• a plurality of nanoporous areas spaced apart in the dense area;
• wherein the dense area comprises a carbon fiber-reinforced silicon carbide material, the nanoporous area comprises pyrolytic carbon in a continuous phase and carbon particles distributed in the pyrolytic carbon, a pore size of the nanoporous area ranges from about 10 nm to about 100 nm, and porosity of the nanoporous area ranges from about 15% to about 30%.