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Silicon nitride ceramic material, preparation method and application thereof, and bulletproof flashboard
The invention relates to a silicon nitride ceramic material, a preparation method and application thereof, and a bulletproof flashboard. The silicon nitride ceramic material is prepared from the following raw materials in percentage by mass: 80 to 90 weight percent of silicon nitride powder, 1 to 6 weight percent of elemental carbon, 1 to 10 weight percent of diboron trioxide powder, 1 to 10 weight percent of nitride whiskers and carbide whiskers, 1 to 10 weight percent of rare earth oxide and 1 to 6 weight percent of an adhesive. Specific components and proportions are adopted, the bending strength and fracture toughness of the silicon carbide ceramic material can be enhanced through the combined action of nitride whiskers, carbide whiskers and rare earth oxide on silicon nitride powder,and the bulletproof performance of the silicon carbide ceramic material can also be improved through cooperation of the nitride whiskers and the carbide whiskers. Meanwhile, the elemental carbon and the diboron trioxide powder can form a discontinuous boron carbide whisker component in the silicon nitride matrix under the catalysis of the rare earth oxide, so that the surface density of the material is reduced, and the hardness and the elasticity modulus of the material are improved.
本发明涉及一种氮化硅陶瓷材料及其制备方法和应用、防弹插板。其中，按照质量百分数计，氮化硅陶瓷材料的原料包括以下组分：氮化硅粉体80wt％～90wt％、碳单质1wt％～6wt％、三氧化二硼粉体1wt％～10wt％、氮化物晶须及碳化物晶须两者总量1wt％～10wt％、稀土氧化物1wt％～10wt％及粘结剂1wt％～6wt％。采用特定的组分及配比，其中，通过氮化物晶须和碳化物晶须和稀土氧化物对氮化硅粉体的共同作用，可以增强碳化硅陶瓷材料的抗弯强度和断裂韧性，且氮化物晶须与碳化物晶须配合，还可以提高碳化硅陶瓷材料的抗弹性能。同时，单质碳与三氧化二硼粉能在稀土氧化物的催化下，在氮化硅基体中形成非连续型的碳化硼晶须成分，不仅降低了材料的面密度，而且提高了材料的硬度及弹性模量。
Silicon nitride ceramic material, preparation method and application thereof, and bulletproof flashboard
The invention relates to a silicon nitride ceramic material, a preparation method and application thereof, and a bulletproof flashboard. The silicon nitride ceramic material is prepared from the following raw materials in percentage by mass: 80 to 90 weight percent of silicon nitride powder, 1 to 6 weight percent of elemental carbon, 1 to 10 weight percent of diboron trioxide powder, 1 to 10 weight percent of nitride whiskers and carbide whiskers, 1 to 10 weight percent of rare earth oxide and 1 to 6 weight percent of an adhesive. Specific components and proportions are adopted, the bending strength and fracture toughness of the silicon carbide ceramic material can be enhanced through the combined action of nitride whiskers, carbide whiskers and rare earth oxide on silicon nitride powder,and the bulletproof performance of the silicon carbide ceramic material can also be improved through cooperation of the nitride whiskers and the carbide whiskers. Meanwhile, the elemental carbon and the diboron trioxide powder can form a discontinuous boron carbide whisker component in the silicon nitride matrix under the catalysis of the rare earth oxide, so that the surface density of the material is reduced, and the hardness and the elasticity modulus of the material are improved.
本发明涉及一种氮化硅陶瓷材料及其制备方法和应用、防弹插板。其中，按照质量百分数计，氮化硅陶瓷材料的原料包括以下组分：氮化硅粉体80wt％～90wt％、碳单质1wt％～6wt％、三氧化二硼粉体1wt％～10wt％、氮化物晶须及碳化物晶须两者总量1wt％～10wt％、稀土氧化物1wt％～10wt％及粘结剂1wt％～6wt％。采用特定的组分及配比，其中，通过氮化物晶须和碳化物晶须和稀土氧化物对氮化硅粉体的共同作用，可以增强碳化硅陶瓷材料的抗弯强度和断裂韧性，且氮化物晶须与碳化物晶须配合，还可以提高碳化硅陶瓷材料的抗弹性能。同时，单质碳与三氧化二硼粉能在稀土氧化物的催化下，在氮化硅基体中形成非连续型的碳化硼晶须成分，不仅降低了材料的面密度，而且提高了材料的硬度及弹性模量。
Silicon nitride ceramic material, preparation method and application thereof, and bulletproof flashboard
氮化硅陶瓷材料及其制备方法与应用、防弹插板
ZENG XIAOFENG (author) / ZHU FULIN (author) / XIAO LIANG (author) / CHEN JUXI (author) / LI YONGQUAN (author)
2021-01-08
Patent
Electronic Resource
Chinese
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