40GPa压力范围内铜和铝的准等熵压缩线

Compression Isentropes of Copper and Aluminum under 40 GPa

基于自行研制的磁驱动准等熵压缩加载实验装置CQ-1.5,利用全光纤位移干涉仪(Doppler Pins System,DPS)、激光速度干涉计(Velocity Interferometer System for AnyReflectors,VISAR)两种测试手段,以及反积分数据处理方法,实验测量了40 GPa压力范围内T1铜、LY12硬铝和L1纯铝3种材料的准等熵压缩线,将实验准等熵压缩线与基于Grüneisen状态方程的理论等熵压缩线和冲击Hugoniot线进行了比较。结果表明,在该压力范围内,实验准等熵压缩线与理论等熵压缩线相一致,两者偏差小于3%;实验准等熵压缩线靠近冲击Hugoniot线,位于其下方,与国外文献发表的结果相同,进一步表明,实验测量结果正确可靠。

Using the magnetically driven apparatus CQ-1.5 developed by us,compression isentropes of copper T1,LY12 aluminum,and pure aluminum L1 are measured up to 40 GPa by Doppler pins system（DPS） and Velocity Interferometer System for Any Reflectors（VISAR）,respectively.The experimental compression isentropes are compared with the theoratical compression isentropes based on Grüneisen equation of state（EOS） and shock Hugoniot data.The results show that the experimental compression isentropes are consistent with the theoretical compression isentropes within a maximum deviation of 3%,and approach to and lie below the shock Hugoniot curves under 40 GPa.The results show that the experimentally measured results are correct and reliable.