AD95陶瓷的高压声速研究  

Sound Velocity Under High Pressure of AD95 Ceramics

作　　者：孙占峰[1] 徐辉[2] 彭建祥[1] 

机构地区：[1]中国工程物理研究院流体物理研究所冲击波物理与爆轰物理国防科技重点实验室,四川绵阳621900 [2]绵阳师范学院数学与计算机科学学院,四川绵阳621000

出　　处：《材料工程》2012年第2期1-4,共4页Journal of Materials Engineering

基　　金：国家自然科学基金(10632080)

摘　　要：采用VISAR技术连续测量样品-窗口界面粒子速率剖面方法,对AD95陶瓷在卸载过程中的高压声速和卸载路径进行了研究。结果表明,加载应力为25.86～57.42GPa时,AD95陶瓷卸载过程中的高压声速降低过程与延性金属材料具有明显区别:卸载过程受加载过程中的双波结构影响,明显分成弹性前驱波卸载和冲击波卸载两个阶段,但第一阶段所占的比例随加载应力的增加逐渐减小;第二阶段中不存在明显的弹性卸载和塑性卸载的拐点。研究结果将为陶瓷材料动态响应和压缩损伤研究奠定基础。The sound velocity under high pressure and the release path of AD95 ceramics have been studied through the measurement of particle velocity profile by VISAR. Results indicate that AD95 ceramics act very differently with metals during unloading process when the impact stress is 25.86- 57.42 GPa. The process is evidently divided into two steps; the first is derived from the unloading of the elastic wave, and the second from the shock wave; the ratio of the first step decreases wit crease of impact stress. There is no a clear inflexion between the elastic unloading and the pl loading in the second step. The results will lay a foundation of study on dynamic response pressive damage of ceramics.

关 键 词：陶瓷 高压 声速 

分 类 号：O347[理学—固体力学]