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Title: A microsecond time resolved x-ray absorption near edge structure synchrotron study of phase transitions in Fe undergoing ramp heating at high pressure

We report a microsecond time-resolved x-ray absorption near edge structure study using synchrotron radiation to dynamically detect structural phase transitions in Fe undergoing rapid heating along a quasi-isochoric path. Within a few ms, we observed two structural phase transitions, which transform the ambient bcc phase of Fe into the fcc phase, and then into the liquid phase. This example illustrates the opportunities offered by energy dispersive x-ray absorption spectroscopy in the study of matter under extreme dynamic conditions. Advanced simulations are compared to these data.
Authors:
; ;  [1] ; ; ; ;  [2]
  1. European Synchrotron Radiation Facility, 6 Rue Jules Horowitz, BP220, 38043 Grenoble Cedex (France)
  2. CEA, Bruyeres le Chatel, 91297 Arpajon Cedex (France)
Publication Date:
OSTI Identifier:
22277922
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 115; Journal Issue: 9; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ABSORPTION SPECTROSCOPY; BCC LATTICES; COMPARATIVE EVALUATIONS; COMPUTERIZED SIMULATION; FCC LATTICES; IRON; LIQUIDS; PHASE TRANSFORMATIONS; PRESSURE DEPENDENCE; SYNCHROTRON RADIATION; TIME RESOLUTION; X-RAY SPECTROSCOPY