SHS制备纳米/微米结构抗弹陶瓷可行性研究

针对用于现代装甲防护的高性能抗弹陶瓷，以SHS冶金技术，通过材料原位合成手段并在大过冷条件下熔体发生共生共晶反应，快速一次性制备出自燃自组装、具有1-3复合晶内型结构的纳米／微米结构Al2O3-ZrO2共晶复相陶瓷。Vickers压痕试验发现该陶瓷具有较高的断裂韧性并表现出较强的塑变行为，SEM观察发现该复相陶瓷的裂纹扩展路径主要受纳米／微米结构(Al2O3-ZrO2)共晶结构所控制，影响该陶瓷韧化行为的主要因素在于以“内晶型”纳米相所构成的独特的增韧机制。试验预示着采用SHS冶金技术，通过控制Al2O3/ZrO2复相陶瓷成分和凝固行为(如采用离心冷却控制技术)，可以制备出用于现代装甲防护的高性能、低成本、高可靠性新型抗弹复相陶瓷面板。

Feasibility of Nano-micron Bomb-proof Ceramics by SHS

Aimed at bomb-proof ceramics with high performance for modern armoured vehicle shield the nano-micron ceramics with Al 2O 3-ZrO 2 eutectic phase by SHS with coupled eutectic transformation in rapid single step has been perpared. Vickers indentation testing indicates that the ceramic is performed with higher fracture toughness and exhibits strong plastic behaviors. SEM observation shows that crack propogation of the ceramic is controlled by nano-submicron (Al 2O 3+ZrO 2) eutectic structures. The key factors influencing ceramic toughening behavior resulted from intra-crystalline structure with nano-phase of the unique enhanced toughness mechnism. It is forecast that the novel bomb-proof ceramic composite plate with high performance, low cost and high reliability for modern armoured shield can be prepared by SHS with controlling the composition of Al 2O 3/ZrO 2 ceramic composite and solidification behavior(such as centrifugal rapid cooling process condition).