Engineering topics
Stoltzfus, Brian
Publications and source records attributed to Stoltzfus, Brian.
Design and Comissioning of Vulcan – A testbed for fast Marx generator and vacuum insulator development
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Design and commissioning of Vulcan - A testbed for Fast Marx generator and vacuum insulator development
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A Sensitivity Analysis of the Self-Break Distribution of a 100 kV Gas Switch
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High pressure induced atomic and mesoscale phase behaviors of one-dimensional TiO 2 anatase nanocrystals
Here, we report the high pressure phase and morphology behavior of ordered anatase titanium dioxide (TiO 2 ) nanocrystal arrays. One-dimensional TiO 2 nanorods and nanorices were synthesized and self-assembled into ordered mesostructures. Their phase and morphological transitions at both atomic scale and mesoscale under pressure were studied using in situ synchrotron wide- and small-angle x-ray scattering (WAXS and SAXS) techniques. At the atomic scale, synchrotron WAXS reveals a pressure-induced irreversible amorphization up to 35 GPa in both samples but with different onset pressures. On the mesoscale, no clear phase transformations were observed up to 20 GPa by synchrotron SAXS. Intriguingly, sintering of TiO 2 nanorods at mesoscale into nano-squares or nano-rectangles, as well as nanorices into nanowires, were observed for the first time by transmission electron microscopy. Such pressure-induced nanoparticle phase-amorphization and morphological changes provide valuable insights for design and engineering structurally stable nanomaterials.
Current-adder pulsed power generators for high-pressure dynamic material studies.
Abstract not provided.
Pulsed power method for determining the electrical conductivities of metals from ambient to HED conditions.
Abstract not provided.
A compact x-ray diffraction system for dynamic compression experiments on the Thor pulsed-power generator.
Abstract not provided.