Martensitic fcc-hcp transformation pathway in solid krypton and xenon and its effect on their equations of state
Source abstract
Abstract
The martensitic transformation is a fundamental physical phenomenon at the origin of important industrial applications. However, the underlying microscopic mechanism, which is of critical importance to explain the outstanding mechanical properties of martensitic materials, is still not fully understood. This is because for most martensitic materials the transformation is a fast process that makes in situ studies extremely challenging. Noble solids krypton and xenon undergo a progressive pressure-induced face-centered cubic (fcc) to hexagonal close-packed (hcp) martensitic transition with a very wide coexistence domain. Here, we took advantage of this unique feature to study the detailed transformation progress at the atomic level by employing in situ x-ray diffraction and absorption spectroscopy. We evidenced a four-stage pathway and suggest that the lattice mismatch between the fcc and hcp forms plays a key role in the generation of strain. We also determined precisely the effect of the transformation on the compression behavior of these materials.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: High-pressure geophysics and materials · Rare-earth and actinide compounds · Intermetallics and Advanced Alloy Properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
European Synchrotron Radiation Facility (ESRF), 71, Avenue des Martyrs, Grenoble, France
CEA, DAM, DIF, 91297 Arpajon Cedex, France
Université Paris-Saclay, CEA, Laboratoire Matière en Conditions Extrêmes, 91680 Bruyères-le-Châtel, France
Université Grenoble Alpes, Université Savoie Mont Blanc, CNRS, IRD, IFSTTAR, ISTerre, 38000 Grenoble, France
Dipartimento di Fisica, Universita' di Roma La Sapienza - Piazzale Aldo Moro 5, 00185 Roma, Italy
University of Potsdam, Institute of Geosciences, Karl-Liebknecht-Str. 24–25, 14476 Potsdam-Golm, Germany
Lawrence Livermore National Laboratory, Livermore, California 94500, USA
Geodynamics Research Center, Ehime University, 2–5 Bunkyo-cho, Matsuyama 790–8577, Japan
Laboratoire Magmas et Volcans, Université Clermont Auvergne, CNRS, IRD, OPGC, F-63000 Clermont-Ferrand, France
Funding
U.S. Department of Energy
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