Search Results - "Hunt, Simon A"

Experimental Observation of a New Attenuation Mechanism in hcp‐Metals That May Operate in the Earth's Inner Core by Hunt, Simon A., Walker, Andrew M., Lord, Oliver T., Stackhouse, Stephen, Schardong, Lewis, Armstrong, Lora S., Parsons, Andrew J., Lloyd, Geoffrey E., Wheeler, John, Fenech, Danielle M., Michalik, Stefan, Whitaker, Matthew L.

“…Seismic observations show the Earth's inner core has significant and unexplained variation in seismic attenuation with position, depth and direction…”
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Anisotropic diffusion creep in postperovskite provides a new model for deformation at the core–mantle boundary by Dobson, David P., Lindsay-Scott, Alexander, Hunt, Simon A., Bailey, Edward, Wood, Ian G., Brodholt, John P., Vocadlo, Lidunka, Wheeler, John

“…The lowermost portion of Earth’s mantle (D″) above the core–mantle boundary shows anomalous seismic features, such as strong seismic anisotropy, related to the…”
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The NiSi melting curve to 70 GPa by Lord, Oliver T, Wann, Elizabeth TH, Hunt, Simon A, Walker, Andrew M, Santangeli, James, Walter, Michael J, Dobson, David P, Wood, Ian G, Vocadlo, Lidunka, Morard, Guillaume, Mezouar, Mohamed

“…The melting curve of NiSi has been determined to 70 GPa on the basis of laser-heated diamond anvil cell (LH-DAC) experiments in which changes in the gradient…”
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Weakening of calcium iridate during its transformation from perovskite to post-perovskite by Dobson, David P, Hunt, Simon A, Weidner, Donald J, Li, Li, Wang, Liping, Walte, Nicolas P, Brodholt, John P

“…The lowermost part of the Earth's mantle-the ∼200-km-thick D′′ layer-shows anomalous seismic properties, and is rheologically distinct from the rest of the…”
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FoilTrack: a package to increase strain-resolution by improved X-radiographic image processing by Hunt, Simon A.

“…In high pressure multi-anvil experiments X-radiography is used to ascertain strain in deforming samples because the tooling prevents optical or other direct…”
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On the increase in thermal diffusivity caused by the perovskite to post-perovskite phase transition and its implications for mantle dynamics by Hunt, Simon A., Davies, D. Rhodri, Walker, Andrew M., McCormack, Richard J., Wills, Andrew S., Dobson, David P., Li, Li

“…The thermal diffusivity (κ) of perovskite and post-perovskite CaIrO3 has been measured, at elevated pressure and temperatures up to 600°C, using the…”
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The thermal expansion of gold: point defect concentrations and pre‐melting in a face‐centred cubic metal by Pamato, Martha G., Wood, Ian G., Dobson, David P., Hunt, Simon A., Vočadlo, Lidunka

“…On the basis of ab initio computer simulations, pre‐melting phenomena have been suggested to occur in the elastic properties of hexagonal close‐packed iron…”
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Kelyphite Textures Experimentally Reproduced through Garnet Breakdown in the Presence of a Melt Phase by Ezad, Isra S, Dobson, David P, Thomson, Andrew R, Jennings, Eleanor S, Hunt, Simon A, Brodholt, John P

“…Complex multiphase reaction rims that form during garnet breakdown are known as kelyphite coronae and are common amongst exhumed mantle xenoliths. It has long…”
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3D electron diffraction studies of synthetic rhabdophane (DyPO4·nH2O) by Duran, Ercin C., Rafiuddin, Mohamed Ruwaid, Shen, Yazhou, Hunt, Simon A., Mir, Anamul Haq, Eggeman, Alexander S.

“…In this study, we report the results of continuous rotation electron diffraction studies of single DyPO4·nH2O (rhabdophane) nanocrystals. The diffraction…”
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The Search for Active Marsquakes Using Subpixel Coregistration and Correlation: Best Practice and First Results by Grindrod, Peter M., Hollingsworth, James, Ayoub, Francois, Hunt, Simon A.

“…The state of seismic activity on Mars is currently unknown. On Earth, coseismic displacement has been observed using visible wavelength images and subpixel…”
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New techniques for high pressure falling sphere viscosimetry in DIA-type large volume presses by Mueller, Hans J., Beckmann, Felix, Dobson, David P., Hunt, Simon A., Lathe, Christian, Stroncik, Nicole

“…Here we report recent technical advances that enable viscosity measurements in two DIA-type multi-anvil apparatus with a maximum of 250 tons and 1750 tons. We…”
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Relative strength of the pyrope–majorite solid solution and the flow-law of majorite containing garnets by Hunt, Simon A., Dobson, David P., Li, Li, Weidner, Donald J., Brodholt, John P.

“…Even though the garnet phase is the second most abundant phase in the upper-mantle and transition-zone, no previous studies have directly measured the effect…”
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Slotted carbide anvils: improved X-ray access for synchrotron-based multi-anvil experiments by Dobson, David P., Hunt, Simon A., Müller, Hans J.

“…We present a new technique to allow enhanced X-ray access to synchrotron-based multi-anvil experiments with tungsten carbide anvils. Slots of 2 mm width and…”
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Thermal diffusivity of MORB-composition rocks to 15GPa: implications for triggering of deep seismicity by Dobson, David P, Hunt, Simon A, McCormack, Richard, Lord, Oliver T, Weidner, Donald J, Li, Li, Walker, Andrew M

“…We have measured the thermal diffusivity of eclogite and majorite with a model MORB composition at pressures of 3 and 15 GPa, respectively. Both phase…”
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Correlative Synchrotron X-ray Imaging and Diffraction of Directed Energy Deposition Additive Manufacturing by Chen, Yunhui, Clark, Samuel J., Collins, David M., Marussi, Sebastian, Hunt, Simon A., Fenech, Danielle M., Connolley, Thomas, Atwood, Robert C., Magdysyuk, Oxana V., Baxter, Gavin J., Jones, Martyn A., Leung, Chu Lun Alex, Lee, Peter D.

“…The governing mechanistic behaviour of Directed Energy Deposition Additive Manufacturing (DED-AM) is revealed by a combined in situ and operando synchrotron…”
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Thermal diffusivity of MORB-composition rocks to 15 GPa: implications for triggering of deep seismicity by Dobson, David P., Hunt, Simon A., McCormack, Richard, Lord, Oliver T., Weidner, Donald J., Li, Li, Walker, Andrew M.

“…We have measured the thermal diffusivity of eclogite and majorite with a model MORB composition at pressures of 3 and 15 GPa, respectively. Both phase…”
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Application of a new method for accurate determination of α and β texture in Ti-6Al-4V from synchrotron diffraction intensities by Daniel, Christopher S., Zeng, Xiaohan, Michalik, Štefan, Hunt, Simon A., da Fonseca, João Quinta

“…The crystallographic texture development during processing of dual-phase Ti alloys like Ti-6Al-4V is of fundamental technological importance. However,…”
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Unravelling dynamic recrystallisation in a microalloyed steel during rapid high temperature deformation using synchrotron X-rays by Zhang, Kai, Wigger, Tim, Pineda, Rosa, Hunt, Simon A., Thomas, Ben, Kwok, Thomas, Dye, David, Plata, Gorka, Lozares, Jokin, Hurtado, Inaki, Michalik, Stefan, Preuss, Michael, Lee, Peter D., Azeem, Mohammed A.

“…Microstructure evolution during high-strain rate and high-temperature thermo-mechanical processing of a 44MnSiV6 microalloyed steel is investigated using in…”
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In-situ measurement of texture development rate in CaIrO3 post-perovskite by Hunt, Simon A., Walker, Andrew M., Mariani, Elisabetta

“…•CPO was measured in CaIrO3 post-perovskite during simple shear deformation.•The CPO was measured from inversion of X-ray diffraction patterns.•VPSC modelling…”
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In-situ measurement of texture development rate in CaIrO 3 post-perovskite by Hunt, Simon A., Walker, Andrew M., Mariani, Elisabetta

“…The rate of crystallographic preferred orientation (CPO) development during deformation of post-perovskite is crucial in interpreting seismic anisotropy in the…”
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