摘要
综合使用超声相干技术几种不同的测量方法，分别研究两类三种不同性能的玻璃材料，测量它们的声速和衰减在室温及高压条件下的变化规律。结果表明：两类玻璃的声速和衰减以及由此而得到的弹性常数存在较大差异。两种硅玻璃在高压下，声速随压力变化的规律相似，压力升高时，纵波速度随之单调增加，横波速度线性减少，纵波衰减也随压力升高呈增加趋势。不同的是：两种玻璃横波衰减随压力的变化规律完全相反，水白玻璃的衰减增加，窗口玻璃的减小。上述几种方法的测量结果基本一致，且在相应的压力范围内与布里渊散射的实验结果基本吻合。
The ultrasonic interferometer techniques phase comparision method,pulse echooverlap,pulse superposition and phase detection have been combined together to study the elasticproperties of three types of glass under different pressures and room temperature.These glasses arenamed by silicate glass (water white glass and window glass)and polystyrene.The results showthat there exists a big difference in the ultrasonic velocities,attenuations and elastic constants atroom temparature between silicate glass and polystyrene.At high pressure,the pressure depen-dences of velocities are similar for both types of silicate glass: the velocities of longitudinal wavesincrease as pressure increased, while the velocities of shear waves decrease linearly,and the atten-uations in longitudinal waves also increase with pressure.However attenuations of shear waves forthe two types of silicate glass vary oppositely with pressure,the attenuation goes up with pressurefor water white glass,and goes down for window glass.The results obtained by above techniquesare consistent,and is in agreement with Brillouin scattering data at corresponding pressure range.
出处
《高压物理学报》
CAS
CSCD
北大核心
1994年第3期177-183,共7页
Chinese Journal of High Pressure Physics
关键词
超声
玻璃
衰减
高压
声速
地声
ultrasonic,glass,velocity,attenuation,high pressure.
