High pressure phase transformations revisited

VI Levitas - Journal of Physics: Condensed Matter, 2018 - iopscience.iop.org
High pressure phase transformations play an important role in the search for new materials
and material synthesis, as well as in geophysics. However, they are poorly characterized …

[HTML][HTML] Recent progress in the application of rotational diamond anvil cell

Y Han, Q Wang, S Li, B Zou, J Jiang, J Yuan, H Zhang… - APL Materials, 2023 - pubs.aip.org
The combination of high pressure and severe plastic deformation in the process of high-
pressure torsion in a rotational diamond anvil cell (RDAC) produces a variety of important …

[HTML][HTML] In-situ study of microstructures induced by the olivine to wadsleyite transformation at conditions of the 410 km depth discontinuity

E Ledoux, M Krug, J Gay, J Chantel, N Hilairet… - American …, 2023 - degruyter.com
The olivine-wadsleyite transformation is believed to occur at depths of about 410 km in the
Earth, producing a major seismic discontinuity in this region of the Earth's mantle. The …

Grain interaction mechanisms leading to intragranular orientation spread in tensile deformed bulk grains of interstitial-free steel

G Winther, JP Wright, S Schmidt… - International Journal of …, 2017 - Elsevier
The spatially resolved intragranular orientation spread in two representative bulk grains of
interstitial-free steel deformed to 9% tension has been investigated. A three-dimensional X …

Large elastoplasticity under static megabar pressures: Formulation and application to compression of samples in diamond anvil cells

B Feng, VI Levitas, RJ Hemley - International Journal of Plasticity, 2016 - Elsevier
In high pressure research, static megabar pressures are typically produced by compression
of a thin sample by two diamonds in various types of diamond anvil cells. This process is …

[HTML][HTML] Revealing sub-μm and μm-scale textures in H2O ice at megabar pressures by time-domain Brillouin scattering

SM Nikitin, N Chigarev, V Tournat, A Bulou… - Scientific reports, 2015 - nature.com
The time-domain Brillouin scattering technique, also known as picosecond ultrasonic
interferometry, allows monitoring of the propagation of coherent acoustic pulses, having …

[HTML][HTML] Transformation microstructures in pyrolite under stress: Implications for anisotropy in subducting slabs below the 660 km discontinuity

JP Gay, E Ledoux, M Krug, J Chantel… - Earth and Planetary …, 2023 - Elsevier
The '660'discontinuity is often associated with a phase transitions in pyrolite at about 24
GPa. There are ubiquitous reports of seismic anisotropy below the '660'which are difficult to …

Textures Induced by the Coesite‐Stishovite Transition and Implications for the Visibility of the X‐Discontinuity

M Krug, M Saki, E Ledoux, JP Gay… - Geochemistry …, 2022 - Wiley Online Library
The coesite‐stishovite phase transition is considered the most plausible candidate to
explain the X‐discontinuity observed at around 300 km depth in a variety of tectonic settings …

3D characterization of individual grains of coexisting high-pressure H2O ice phases by time-domain Brillouin scattering

S Sandeep, T Thréard, E de Lima Savi… - Journal of Applied …, 2021 - pubs.aip.org
Time-domain Brillouin scattering (TDBS) uses ultrashort laser pulses to (i) generate
coherent acoustic pulses of picoseconds duration in a solid sample and (ii) follow their …

In situ monitoring of phase transformation microstructures at Earth's mantle pressure and temperature using multi-grain XRD

AD Rosa, N Hilairet, S Ghosh, G Garbarino… - Journal of Applied …, 2015 - scripts.iucr.org
Microstructures govern the mechanical properties of materials and change dramatically
during phase transformations. A detailed understanding of microstructures at different stages …