一种新型高性能抗冲击防弹陶瓷的组分及烧结工艺研究

Study on the composition and sintering process of anew high performance impact and bulletproof ceramic

为提高碳化硅防护装甲材料的抗冲击性能,基于Materials Studio建立的模型仿真研究高温下Al-BN-C体系助剂在SiC中具有良好的热稳定性与结晶度,并通过实验验证模拟的有效性。以碳化硅微粉作为原料,向原料中分别添加Al-BN-C体系烧结助剂及Al 2O 3-Y 2O 3-MgO体系烧结助剂,热压烧结后对比2种陶瓷的抗冲击性能,在1950℃、30 MPa、保温保压60 min条件下,Al-BN-C体系助剂由于液相的形成使得SiC陶瓷抗冲击性能更加优越,当烧结助剂体系Al∶BN∶C按摩尔比2∶1∶1配比时,SiC陶瓷的维氏硬度达到2732.6 HV,致密度达到98.6%,抗冲击载荷峰值达到18383.58 N,根据最优抗冲击性能得到SiC陶瓷热压烧结工艺曲线。

In order to improve the impact resistance of silicon carbide protective armor materials,a model simulation study was established based on Materials Studio to investigate the good thermal stability and crystallinity of Al-BN-C system additives in SiC at high temperatures.The effectiveness of the simulation was verified through experiments.Using silicon carbide micropowder as raw material,Al-BN-C system sintering aids and Al 2O 3-Y 2O 3-MgO system sintering aids were added to the raw material.After hot pressing sintering,the impact resistance of the two ceramics was compared.Under the conditions of 1950℃,30 MPa,and 60 minutes of insulation and pressure holding,the Al-BN-C system aids,due to the formation of the liquid phase,made the impact resistance of SiC ceramics more superior.When the Al∶BN∶C sintering aid system had a 2∶1∶1 ratio,The Vickers hardness of SiC ceramics reaches 2732.6 HV,the density reaches 98.6%,and the peak impact load resistance reaches 18383.58 N.Based on the optimal impact resistance,the hot pressing sintering process curve of SiC ceramics is obtained.