基于PIPA技术的固体推进剂无损检测研究  

Study on nondestructive detection in solid propellant based on PIPA

作　　者：任宁莉[1,2] 赵新强[2] 张彦伟[2] 麻燕南[2] 

机构地区：[1]清华大学工程物理系,北京100084 [2]第二炮兵装备研究院,北京100085

出　　处：《固体火箭技术》2010年第5期590-593,共4页Journal of Solid Rocket Technology

摘　　要：针对国内现有无损探伤方法无法检测固体推进剂微观缺陷的情况,引入光致正电子湮灭分析方法,即PIPA(Photon Induced Positron Annihilation)。该方法利用加速器产生的高能光子引发的正电子与固体推进剂作用来检测其缺陷,能在固体推进剂宏观缺陷出现前检测出其微观结构的变化。介绍了PIPA原理,并通过试验讨论了温度、拉伸速率及推进剂的力学性能等因素对利用PIPA进行固体推进剂探伤结果的影响,所得结论与固体推进剂的常规测试具有一致性,证明了PIPA用于固体推进剂无损探伤的可行性。In considering that the micro defects can not be detected with present nondestructive detection methods,PIPA（Photon Induced Positron Annihilation） is introduced.The positrons created by the PIPA process are formed throughout the solid propellant and the defects in solid propellant could be detected by examining the annihilation of the positrons in solid propellant.With this method,the changes of microstructure could be inspected before the macro defects appear.The fundamentals and effects of different factors,including temperature,strain rate and the mechanical properties of solid propellant on the nondestructive detection to solid propellant are described accordimg to the experiment.The results of experiments are coincident with the regular tests,which proves its feasibility in nondestructive detection of solid propellant.

关 键 词：光致正电子湮灭分析 固体推进剂 无损探伤 S因子 

分 类 号：V512[航空宇航科学与技术—航空宇航推进理论与工程]