6533b86ffe1ef96bd12cd465
RESEARCH PRODUCT
Microscopic evidence of a flat melting curve of tantalum
Javier Ruiz-fuertesDaniel ErrandoneaAmol KarandikarReinhard Boehlersubject
Diffractionlaser-heatingMaterials sciencehigh-pressurePhysics and Astronomy (miscellaneous)Scanning electron microscope62.50.-p64.70.djTantalumAnalytical chemistrychemistry.chemical_element02 engineering and technology01 natural sciencesdiamond-anvil cellDiamond anvil cellMelting curve analysistransition metalsTransition metal0103 physical sciencesTexture (crystalline)010306 general physics62.50.EfAstronomy and Astrophysics021001 nanoscience & nanotechnologyCrystallographyGeophysicsmelting curvechemistrySpace and Planetary Science0210 nano-technologyMelting-point depressiondescription
International audience; New data on the high-pressure melting curve of Ta up to 48GPa are reported. Evidence of melting from changes in sample texture was found in five different experiments using scanning electron microscopy. The obtained melting temperatures are in excellent agreement with earlier measurements using x-ray diffraction or the laser-speckled method but are in contrast with several theoretical calculations. The results are also compared with shock-wave data. These findings are of geophysical relevance because they confirm the validity of earlier experimental techniques that resulted in low melting slopes of the transition metals measured in the diamond-anvil cell, including iron.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2010-05-27 |