SiC、B4C及层状SiC/BN复合结构与防弹性能关系  

Relationship of Ballistic Performance Between SiC, B4C and Laminated Composite Structure of SiC/BN Ceramics

作　　者：沈志伟 李伟萍 黄献聪 王汝江 马天 SHEN Zhiwei;LI Weiping;HUANG Xiancong;WANG Rujiang;MA Tian(Institute of Quartermaster Engineering Technology of PLA Academy of Military Science,Beijing 100010,China;Shandong Jinhong New Material Shares Co.,Ltd,Weifang 262100,Shandong,China)

机构地区：[1]军事科学院系统工程研究院军需工程技术研究所,北京100010 [2]山东金鸿新材料股份有限公司,山东潍坊262100

出　　处：《硅酸盐学报》2020年第6期841-848,共8页Journal of The Chinese Ceramic Society

基　　金：国家重点研发计划(2017YFB1103505);武警后勤科研项目(WHKL15-1)。

摘　　要：通过有限元分析及弹击实验验证,研究了SiC、B4C块体陶瓷及SiC/BN层状陶瓷复合装甲在5.8 mm钢芯弹920 m/s速率打击下的损伤破坏机制。结果表明:具有弱界面结构的层状SiC/BN陶瓷断裂韧性可达7.6 MPa·m1/2,其在经受子弹打击时,靠近迎弹面以基体及夹层剪切断裂为主,靠近背弹面呈现分层及折状断裂等破坏机制,随着夹层质量分数增加,基体断裂沿晶断裂向穿晶断裂转变。层状陶瓷由迎弹面至背弹面基体层厚度呈梯度递减的结构有利于减小鉴证靶凹陷深度。当BN夹层质量分数为6.9%时,SiC/BN层状陶瓷防护性能较好,而SiC、B4C块体陶瓷在抗多发弹打击时表现出更优防护性能。The failure mechanisms of SiC,B4C ceramic and the laminated SiC/BN composite armor under ballistic impacts of 5.8 mm steel bullet at 920 m/s were investigated by the finite element analysis and ballistic experiments.The results show that the fracture toughness of laminated SiC/BN ceramic with weak interfaces is 7.6 MPa·m1/2.The shear fractures of substrate and interlayer appear on the ballistic impact surface,and the delamination and folding fractures occur at the back.The more transgranular fractures occur when the interlayers increase,compared to the intergranular fractures.The shallower impact craters are generated when the thickness of the SiC substrate layers decreases along the impact direction.SiC/BN laminated ceramic has a better ballistic performance when the mass fraction of BN interlayer is 6.9%,and SiC and B4C block ceramics exhibit a better ballistic performance under multiple bullet impact condition.

关 键 词：层状陶瓷 复合装甲 功能梯度 抗冲击 断裂机理 

分 类 号：TQ174.15[化学工程—陶瓷工业]