PVDF在电子束辐射材料产生的热激波测量中的应用

 介绍了在“闪光二号”脉冲电子束加速器上采用PVDF压电传感技术测量编织材料等的电子束热激波传播特性的情况。实验得出：（1）在能注量为90～210 J/cm²范围内，对4 mm厚的编织材料及其叠层材料，热激波应力峰值σ_a<0.1 GPa，只有硬铝的十几分之一；（2）编织材料中的热激波作用时间被明显展宽，其平均值达2.6 μs，是硬铝中的7倍多。实验结果表明：（1）编织材料具有良好的衰减和展宽热激波的性能；（2）对编织材料等的宽作用时间热激波测量来说，PVDF压电传感技术具有极其优越的性质。

APPLICATION OF PVDF FOR THERMAL SHOCK WAVE MEASUREMEN TIN MATERIALS RADIATED BY ELECTRON BEAM

In this paper, the propagating characteristics of thermal shock waves induced by electron beam are investigated experimentally using PVDF piezoelectric gauges. Experimental results indicate: (1) As energy flux is between 90 and 210 J/cm², peak stress of thermal shock waves in weave material and it's parted material is below 0.1 GPa, which is less than one tenth of that in LY12Al; (2) Action time in weave material is obviously widened, and it's average value is 2.6 μs, which is more than 7 times of that in LY12Al. The experimental results show: (1) The wave material has excellent characteristics of dissipating and widening thermal shock waves; (2) PVDF piezoelectric gauges can be used to measure the thermal shock waves in weave material, which has long action time.