Abstract
X-ray tomography is a non-destructive three-dimensional imaging/microanalysis technique selective to a wide range of properties such as density, chemical composition, chemical states and crystallographic structure with extremely high sensitivity and spatial resolution. Here the development of in situ high-pressure high-temperature micro-tomography using a rotating module for the Paris-Edinburgh cell combined with synchrotron radiation is described. By rotating the sample chamber by 360°, the limited angular aperture of ordinary high-pressure cells is surmounted. Such a non-destructive high-resolution probe provides three-dimensional insight on the morphological and structural evolution of crystalline as well as amorphous phases during high pressure and temperature treatment. To demonstrate the potentials of this new experimental technique the compression behavior of a basalt glass is investigated by X-ray absorption tomography, and diffraction/scattering tomography imaging of the structural changes during the polymerization of C60 molecules under pressure is performed. Small size and weight of the loading frame and rotating module means that this apparatus is portable, and can be readily installed on most synchrotron facilities to take advantage of the diversity of three-dimensional imaging techniques available at beamlines. This experimental breakthrough should open new ways for in situ imaging of materials under extreme pressure-temperature-stress conditions, impacting diverse areas in physics, chemistry, geology or materials sciences.
Highlights
X-ray tomography refers to the cross-sectional imaging of the interior of bulk objects through the use of an intense beam of high-energy X-ray photons
To demonstrate the potentials of this new experimental technique the compression behavior of a basalt glass is investigated by X-ray absorption tomography, and diffraction/scattering tomography imaging of the structural changes during the polymerization of C60 molecules under pressure is performed
To illustrate the potential of this device, we present results on the compression of a basalt glass obtained by mCT, and diffraction/ scattering-CT imaging of the pressure-induced structural changes during C60 polymerization
Summary
X-ray tomography refers to the cross-sectional imaging of the interior of bulk objects through the use of an intense beam of high-energy X-ray photons. Only GSECARS at the Advanced Photon Source at Argonne National Laboratory has the capability of performing absorption-based tomography in large-volume samples under high pressure ($ 10 GPa), high temperature ($ 1500 K) and deformation, using a modified Drickamer cell allowing the full rotation of the sample chamber under load (Wang et al, 2005; Yu et al, 2016) This device has been successfully used to study the volumetric properties of non-crystalline materials (Lesher et al, 2009), and the deformation behavior of multi-phase composites under shearing (Wang et al, 2011). On-going developments and further applications of this new device to other in situ tomography techniques are given as final prospects
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
