▎ 摘　　要

NOVELTY - Preparation of carbon fiber reinforced boron carbide composite material involves (s1) mixing boron carbide powder, deionized water, dispersing agent, binder and sintering aid to obtain boron carbide slurry, (s2) mixing boron carbide powder, deionized water, dispersing agent, binder and sintering aid to obtain boron carbide viscous slurry, (s3) placing boron carbide slurry in vacuum ultrasonic machine, and soaking carbon fiber cloth, vacuumizing, taking out and drying to obtain carbon fiber cloth soaked with boron carbide slurry, (s4) placing piece of carbon fiber cloth impregnated with boron carbide slurry on the boron carbide viscous slurry layer, arranging the boron carbide viscous slurry layer and carbon fiber cloth impregnated with boron carbide slurry, and drying to obtain green blank, (s5) putting green blank into a mold, sintering and molding by discharge plasma sintering furnace, and cooling. USE - Preparation of carbon fiber reinforced boron carbide composite material used in bulletproof armor, cutter material, and nuclear reactor. ADVANTAGE - The method solves the problem that the existing carbon fiber reinforced boron carbide composite ceramic material has complex preparation technique, low sintering density and low mechanical property. The thick slurry is paved between two layers of carbon fiber cloth soaked with carbon and borons, which can make the green blank reach a certain intensity, easy to process and transfer. The viscous slurry can effectively reduce the pore space formed by water evaporation in the drying process. DETAILED DESCRIPTION - Preparation of carbon fiber reinforced boron carbide composite material involves (s1) uniformly mixing boron carbide powder, deionized water, dispersing agent, binder and sintering aid to obtain boron carbide slurry. The mass ratio of the boron carbide powder to the deionized water is 1: (1.5-5), the mass ratio of the boron carbide powder to the dispersant is 1: (0.001-0.05), the mass ratio of the boron carbide powder to the binder is 1: (0.01-0.2), and the mass ratio of the boron carbide powder to the sintering aid is 1: (0-20), (s2) uniformly mixing boron carbide powder, deionized water, dispersing agent, binder and sintering aid to obtain boron carbide viscous slurry. The mass ratio of the boron carbide powder to the deionized water is 1:(0.2-1), the mass ratio of the boron carbide powder to the dispersant is 1 (0.001-0.05), the mass ratio of the boron carbide powder to the binder is 1: (0.01-0.2), and the mass ratio of the boron carbide powder to the sintering aid is 1: (0-20), (s3) placing the boron carbide slurry in a vacuum ultrasonic machine, and soaking the carbon fiber cloth in the boron carbide slurry, vacuumizing, carrying out ultrasonic treatment for 3-30 minutes under the condition the vacuum degree of 1-5 Pa, and taking out and drying after ultrasonic treatment to obtain the carbon fiber cloth soaked with the boron carbide slurry, (s4) spraying the boron carbide viscous slurry on the anti-sticking plate to obtain a boron carbide viscous slurry layer, placing a piece of carbon fiber cloth impregnated with the boron carbide slurry on the boron carbide viscous slurry layer, and repeatedly and alternately arranging the boron carbide viscous slurry layer and the carbon fiber cloth impregnated with the boron carbide slurry, and finally drying to obtain a green blank, and the outermost layers of the two sides of the green blank is boron carbide viscous slurry layers, (s5) putting the green blank into a mold, sintering and molding by using a discharge plasma sintering furnace, cooling and taking out.