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Meeting 2017 TMS Annual Meeting & Exhibition
Symposium Characterization of Materials through High Resolution Coherent Imaging
Presentation Title Phase Contrast Tomography to Document Gypsum Dehydration in Single Crystals and Polycrystalline Materials
Author(s) Florian Fusseis, Xianghui Xiao, John Bedford, Henri Leclere
On-Site Speaker (Planned) Xianghui Xiao
Abstract Scope Gypsum (CaSO4.2H2O) is one of the most abundant naturally occurring sulphates and of immense significance for several research communities, ranging from construction materials, trough artifact preservation to tectonic processes. At the core of most research is the dehydration path of gypsum upon heating, from gypsum to hemihydrate (CaSO4.1/2H2O) then anhydrite (CaSO4). Despite a century worth of research, key aspects of the dehydration process are still poorly understood. For the first time, we used synchrotron-based phase contrast microtomography to document the hemihydrate formation during the dehydration of gypsum in situ. Our 4D data comprise several tens of time steps and capture the advance of the reaction in sufficient detail to determine the reaction rate and identify the key parameters governing reaction advance. the new data not only advances our understanding of this ubiquitous material significantly but also outlines a novel direction in the study of chemical reactions.
Proceedings Inclusion? Planned: Supplemental Proceedings volume

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

3D Imaging of High-pressure Induced Deformation Twinning in a Nanocrystal
3D X-ray Imaging of Defect Dynamics in Nanostructured Materials
Anisotropic Growth Patterns in Four Dimensions
Applications of High Resolution Coherent X-Ray Imaging Techniques for Investigating Additively Manufactured Materials
Biological and Bio-inspired Multifunctional Structural Materials
Biological Imaging Using Combined Ptychography and X-ray Fluorescence
Biomimetic CaCO3 Complex Morphologies Studied by Coherent X-ray Diffraction Imaging
Characterizing Evolving Processes through Coupled CDI and Molecular Dynamics Studies
Coherent Diffractive Imaging with Wavelength Spatial Resolution using 13.5nm High Harmonics: Full Field, High-contrast Imaging on a Tabletop
Coherent X-ray Diffraction Measurements of Lattice Distortions Caused by Ion Bombardment
Coherent X-ray Imaging at Future High Brightness Synchrotron Sources
High Resolution Coherent Imaging for Materials
High Speed Tomographic Imaging of Materials during Uniaxial Loading
Imaging Strain Fields by Ptychographic Topography
In-Situ and In-Operando Examination of Structure-Functional Relations in Porous Materials for Energy Conversion and Storage with Nano- and Micro- Synchrotron X-ray Computed Tomography
In-situ Deformation and Damage Assessment in Materials under Dynamic Loading Using High Speed Synchrotron X-ray Phase Contrast Imaging
In-situ Phase Contrast Nano-tomography at ID16B
Nanoscale 4D Microstructural Evolution of Precipitates in Aluminum Alloys Using Transmission X-Ray Microscopy (TXM)
Nanoscale Chemical Imaging of an Individual Catalyst Particle with Soft X-ray Ptychography
Phase Contrast Tomography to Document Gypsum Dehydration in Single Crystals and Polycrystalline Materials
Photoelastic Ptychography: A New Approach for Quantitative Stress Determination
Polychromatic Bragg Coherent X-ray Diffraction Imaging for Rapid Measurements
Progress towards Dichroic Bragg Coherent Diffractive Imaging
Real-time Direct and Diffraction Hard X-ray Imaging of Ultra-fast Processes
Revolutions in Coherent X-ray Sources Will Enable Dynamic Nanometer Scale Strain Imaging in Structural Materials
Soft-X-ray Ptychographic Imaging of Shale
Some Recent Advances in the Theory and Modeling of Phase Contrast Imaging
Speckle-based X-ray Imaging at Diamond Light Source
Unraveling the Structure-function Relationships in Ion Implanted Nanodiamonds
Zernike Phase Contrast for Hard X-ray Microscopy

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