phase diagram of tin determined by sound velocity measurements on multi-anvil apparatus up to 5GPa and 800K

作者：Xu, Liang; Bi, Yan; Li, Xuhai; Wang, Yuan; Cao, Xiuxia; Cai, Lingcang; Wang, Zhigang^*; Meng, Chuanmin

来源：Journal of Applied Physics, 2014, 115(16): 164903.

DOI：10.1063/1.4872458

• X-RAY-DIFFRACTION
• HIGH-PRESSURE
• HIGH-TEMPERATURE
• TRANSFORMATIONS

The tin beta-gamma-liquid triple point and the melting curve at high pressure have been controversial for a long time. Apart from being of fundamental importance, the sound velocity at high pressure and high temperature also provides a practical approach for determining melting curves and phase boundaries. We investigated the sound velocities and phase diagram of tin up to 5GPa and 800K by ultrasonic measurements on a multi-anvil apparatus. The beta-gamma-liquid triple point obtained in this work is 3.02 +/- 0.05GPa and 562 +/- 2K. The experimental data and the extrapolated melting curve of the gamma phase using the Simon-type equation are in good agreement with the theoretical and most of the experimental results at high pressure. These results indicate that sound velocity measurements based on multi-anvil apparatus can be a convenient and reliable approach to determine the high-pressure melting curve and phase boundaries of materials.

• 出版日期2014-4-28
• 单位中国工程物理研究院流体物理研究所; 中国工程物理研究院