Experimental research on high pressure phase transitions of Mo and Ta*
L.-C. Caia, Z.-Y. Zeng, X.-L. Zhang and J.-B. Hu
National Key Laboratory for Shock Wave and Detonation Physics Research, Institute of Fluid Physics, Chinese Academy of Engineering Physics, Mianyang 621900, China
a e-mail: Cai_Lingcang@yahoo.com.cn
Published online: 19 January 2011
The high pressure phase transitions of Mo and Ta were investigated experimentally. More melting temperatures were obtained by shock wave experiments. The measured melting temperature at lowest pressure is still much higher than that of DAC experiments. By measurements of sound velocities of Ta in reverse-impact shock wave experiments, a discontinuity of longitudinal sound velocity against shock pressure at ∼60 GPa was observed. It may be concluded that a solid-solid phase transition exists.
© Owned by the authors, published by EDP Sciences, 2010