期刊
JOURNAL OF APPLIED PHYSICS
卷 104, 期 8, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.3003325
关键词
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资金
- National Natural Science Foundation of China [10672149]
- Foundation of Laboratory for Shock Wave and Detonation Physics Research
- Chinese Academy of Engineering Physics [9140C6702020603]
A direct reverse-impact configuration together with the velocity interferometer system for any reflector was utilized to accurately measure longitudinal and bulk sound velocities of tin under shock compression. Shock-induced bct-bcc transition and melting of tin were identified based on the discontinuity of the longitudinal sound velocity against shock pressure, which were not previously revealed by Hugoniot and wave profile measurements. The transition pressures for bct to bcc phase and bcc to liquid phase were constrained to be similar to 34 +/- 2 and similar to 39 +/- 2 GPa, respectively. The shear modulus and yield strength at loaded shock stresses were extracted from the measured sound velocities. A tentative phase diagram of tin was constructed by available experimental data and thermodynamic calculations, which was consistent with results from diamond anvil cell experiments and inconsistent with those from shock temperature measurements and molecular dynamic simulations. (c) 2008 American Institute of Physics. [DOI: 10.1063/1.3003325]
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