Damage characteristics of YAG transparent ceramics under different loading conditions  

作　　者：Kuo Bao Xian-feng Zhang Gui-ji Wang Jia-jie Deng Tao Chong Dan Han Bing-qiang Luo Meng-ting Tan 

机构地区：[1]School of Mechanical Engineering,Nanjing University of Science&Technology,Nanjing,210094,China [2]Institute of Fluid Physics,CAEP,Mianyang,621900,China [3]Shanghai Institute of Ceramics,Chinese Academy of Sciences,Shanghai,200050,China

出　　处：《Defence Technology（防务技术）》2022年第8期1394-1404,共11页Defence Technology

基　　金：This work is funded by the National Natural Science Foundation of China(No.11772159);the NSAF Joint Fund(No.U1730101);the Fundamental Research Funds for the Central Universities(No.30917011104).

摘　　要：YAG (Y_(3)Al_(5)O_(12)) transparent ceramics have attractive application prospects for transparent armor protection modules because of their excellent light transmittance and anti-ballistic capability. Understanding the fracture behavior and damage mechanism of YAG is necessary for armor design. To explore the damage characteristics of YAG under compression and tension, shock compression and shockless spalling experiments with soft recovery technique are conducted. The spall strength of YAG is obtained and the recovered samples are observed by CT and SEM. It is shown that the macroscopic damage characteristic of YAG under compression is vertical split cracks with oblique fine cracks distributed in the entire sample, while that under tension is horizontal transgranular cracks concentrated near the main spall surface. The cracks generated by macroscopic compression, tension and shear stress extend in similar tensile form at the microscale. The proportion of transgranular fractures on spall surfaces is higher than that of cracks induced by macroscopic compression. Meanwhile, higher loading rate and longer loading duration increase the transgranular fracture percentage.

关 键 词：YAG transparent Ceramics Damage characteristics Impact loading Shock compression Spall strength 

分 类 号：TJ04[兵器科学与技术—兵器发射理论与技术]