Study of cerium phase transitions in shock wave experiments

• Published in: Journal of experimental and theoretical physics Vol. 112; no. 2; pp. 212 - 219
• Main Authors: Zhernokletov, M. V., Kovalev, A. E., Komissarov, V. V., Novikov, M. G., Zocher, M. A., Cherne, F. J.
• Format: Journal Article
• Language: English
• Published: Dordrecht SP MAIK Nauka/Interperiodica 01-02-2011; Springer
• Subjects: CARBON TETRACHLORIDE; CERIUM; Classical and Quantum Gravitation; CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; Copper alloys; ELASTICITY; Elementary Particles; LIQUIDS; MANGANIN; MELTING; Particle and Nuclear Physics; PHASE DIAGRAMS; PHASE STABILITY; PHASE STUDIES; Physics; Physics and Astronomy; PRESSURE DEPENDENCE; PRESSURE RANGE GIGA PA; Quantum Field Theory; Relativity Theory; SHOCK WAVES; Solid State Physics; Solids and Liquids; SOUND WAVES; Toy industry; VELOCITY; Cerium; Shock Front; Sound Velocity; Rarefaction Wave; Shock Wave
• ISSN: 1063-7761; 1090-6509
• DOI: 10.1134/S1063776110061196

Cerium has a complex phase diagram that is explained by the presence of structural phase transitions. Experiments to measure the sound velocities in cerium by two methods were carried out to determine the onset of cerium melting on the Hugoniot. In the pressure range 4–37 GPa, the sound velocity in cerium samples was measured by the counter release method using manganin-based piezoresistive gauges. In the pressure range 35–140 GPa, the sound velocity in cerium was measured by the overtaking release method using carbogal and tetrachloromethane indicator liquids. The samples were loaded with plane shock wave generators using powerful explosive charges. The onset of cerium melting on the Hugoniot at a pressure of about 13 GPa has been ascertained from the measured elastic longitudinal and bulk sound velocities.