Preparation method of ultrasonic-dispersion tungsten carbide and silicon carbide-carbon fiber friction material

[0019] (1) Set the density to 1.8g / cm 3 The graphitized carbon fiber blanket is fed with a mixed gas of propane gas and nitrogen at a temperature of 900°C. The molar ratio of propane gas: nitrogen is 1:4, the flow rate is controlled at 50ml / min, and the carburizing treatment is performed for 24 hours to obtain a carburized carbon fiber blanket. ;

[0020] (2) Immerse the above-mentioned carburized carbon fiber blanket into a slurry with a particle size of less than 0.3 μm and a content of 5% tungsten carbide, place it in an ultrasonic cleaner and fill it with tungsten carbide for 50 minutes, take it out and dry it to obtain a filled tungsten carbide carbon fiber blanket, slurry The material is an aqueous solution containing 1.5% ammonium polyacrylate with a pH value of 9;

[0021] (3) Pass the above-mentioned filled tungsten carbide carbon fiber blanket into a mixed gas of trichloromethylsilane gas, hydrogen gas and argon gas at a temperature of 900 °C, and the molar ratio o

[0025] (1) Set the density to 0.8g / cm 3 The graphitized carbon fiber blanket is fed with a mixture of propane gas and nitrogen at a temperature of 1000°C. The molar ratio of propane gas: nitrogen is 1:5, the flow rate is controlled at 350ml / min, and the carburizing treatment is performed for 18 hours to obtain a carburized carbon fiber blanket. ;

[0026] (2) Immerse the above carburized carbon fiber blanket into a slurry with a particle size of less than 0.3 μm and a content of 12% tungsten carbide, place it in an ultrasonic cleaner and fill it with tungsten carbide for 40 minutes, take it out and dry it to obtain a filled tungsten carbide carbon fiber blanket, slurry The material is an aqueous solution containing 1% ammonium polyacrylate with a pH value of 10;

[0027] (3) Pass the above-mentioned filled tungsten carbide carbon fiber blanket into a mixed gas of trichloromethylsilane gas, hydrogen gas and argon gas at a temperature of 1000 ° C. The molar ratio of trichlorom

[0031] (1) Set the density to 0.1g / cm 3 The graphitized carbon fiber blanket is fed with a mixed gas of propane gas and nitrogen at a temperature of 1100°C. The molar ratio of propane gas: nitrogen is 1:6, the flow rate is controlled at 600ml / min, and the carburizing treatment is performed for 10 hours to obtain a carburized carbon fiber blanket. ;

[0032] (2) Immerse the above carburized carbon fiber blanket into a slurry with a particle size of less than 0.3 μm and a content of 20% tungsten carbide, place it in an ultrasonic cleaner and fill it with tungsten carbide for 30 minutes, take it out and dry it to obtain a filled tungsten carbide carbon fiber blanket, slurry The material is an aqueous solution containing 0.5% ammonium polyacrylate with a pH value of 11;

[0033] (3) Pass the above-mentioned filled tungsten carbide carbon fiber blanket into a mixed gas of trichloromethylsilane gas, hydrogen gas and argon gas at a temperature of 1100 °C, and the molar ratio of tri