Output search results for "Bull%2C+D" (13)

Static and dynamic correlation in lattice gas systems : an application to the intermetallic hydride ZrV2Hx (2001)
Thesis

CRT, a Monte Carlo program for the simulation of particle diffusion on a lattice gas is
presented. The particle transition probability is calculated as a function of three
parameters: lattice site energies, inter-particle interactions and neighbour... Read More about Static and dynamic correlation in lattice gas systems : an application to the intermetallic hydride ZrV2Hx.

Crossover between liquid-like and gas-like behaviour in CH4 at 400 K (2017)
Journal Article

We report experimental evidence for a crossover between a liquid-like state and a gas-like state in fluid methane (CH4). This crossover is observed in all of our experiments, up to 397 K temperature; 2.1 times the critical temperature of methane. The... Read More about Crossover between liquid-like and gas-like behaviour in CH4 at 400 K.

On the high-pressure phase stability and elastic properties of β-titanium alloys (2017)
Journal Article

We have studied the compressibility and stability of different β-titanium alloys at high pressure, including binary Ti–Mo, Ti–24Nb–4Zr–8Sn (Ti2448) and Ti–36Nb–2Ta–0.3O (gum metal). We observed stability of the β phase in these alloys to 40GPa, well... Read More about On the high-pressure phase stability and elastic properties of β-titanium alloys.

n-Diamond : Dynamical stability of proposed structures (2013)
Journal Article
Baldissin, G., & Bull, D. (2013). n-Diamond : Dynamical stability of proposed structures. Diamond and Related Materials, 34, 60-64. https://doi.org/10.1016/j.diamond.2013.01.010

A number of experimental works, mainly under extreme conditions, report a carbon phase with the same reflections as diamond but showing additional reflections that are forbidden for diamond. The crystal structure of this phase, called n-diamond by Hi... Read More about n-Diamond : Dynamical stability of proposed structures.

Synthesis of pure lithium amide nanoparticles (2013)
Journal Article
Baldissin, G., Boag, N., Tang, C., & Bull, D. (2013). Synthesis of pure lithium amide nanoparticles. European Journal of Inorganic Chemistry, 1993-1996. https://doi.org/10.1002/ejic.201201535

Deprotonation of ammonia with n-butyllithium offers a facile synthetic route to produce pure lithium amide exhibiting fine granularity, which facilitates the complete thermal decomposition to lithium imide at a relatively low temperature of 600 K. Sy... Read More about Synthesis of pure lithium amide nanoparticles.

Hydrogenation reaction pathway in Li2Mg(NH)2 (2009)
Journal Article
Weidner, E., Dolci, F., Hu, J., Lohstroh, W., Hansen, T., Bull, D., & Fichtner, M. (2009). Hydrogenation reaction pathway in Li2Mg(NH)2. Journal of Physical Chemistry C, 113(35), 15772-15777. https://doi.org/10.1021/jp9034997

Results of the first time-resolved in situ neutron diffraction measurements during absorption of deuterium in Li2Mg(ND)2 reveal the occurrence of a two-stage reaction. The first stage involves the reaction to LiND2, LiD, and Li2Mg2(ND)3, with the sec... Read More about Hydrogenation reaction pathway in Li2Mg(NH)2.

Low frequency sound propagation in activated carbon (2012)
Journal Article

Activated carbon can adsorb and desorb gas molecules onto and off its surface. Research has examined
whether this sorption affects low frequency sound waves, with pressures typical of audible
sound, interacting with granular activated carbon. Imped... Read More about Low frequency sound propagation in activated carbon.

Observation of novel phases during deuteration of lithium nitride from in situ neutron diffraction (2007)
Journal Article
Weidner, E., Bull, D., Shabalin, I., Keens, S., Telling, M., & Ross, D. (2007). Observation of novel phases during deuteration of lithium nitride from in situ neutron diffraction. Chemical Physics Letters, 444, 76-79. https://doi.org/10.1016/j.cplett.2007.07.010

We report on in situ neutron diffraction measurements during the deuteration of Li3N. A number of novel observations are described: The presence of cubic ‘quasi-imide’ phases with composition-dependent lattice parameters, the identification of Li4ND... Read More about Observation of novel phases during deuteration of lithium nitride from in situ neutron diffraction.

The pressure–temperature phase diagram of MgH2 and isotopic substitution (2011)
Journal Article

Computational thermodynamics using density functional theory ab initio codes is a powerful tool for calculating phase diagrams. The method is usually applied at the standard pressure of p = 1 bar and where the Gibbs energy is assumed to be equal to t... Read More about The pressure–temperature phase diagram of MgH2 and isotopic substitution.

In-situ powder neutron diffraction study of non-stoichiometric phase formation during the hydrogenation of Li3N (2011)
Journal Article
Bull, D., Sorbic, N., Moser, D., Telling, M., Smith, R., Gregory, D., & Ross, D. (2011). In-situ powder neutron diffraction study of non-stoichiometric phase formation during the hydrogenation of Li3N. Faraday Discussions, 151, https://doi.org/10.1039/c0fd00020e

The hydrogenation of Li3N at low chemical potential has been studied in situ by time-of-flight powder neutron diffraction and the formation of a nonstoichiometric
Li4_2xNH phase and Li4NH observed. The results are interpreted in terms of a model for... Read More about In-situ powder neutron diffraction study of non-stoichiometric phase formation during the hydrogenation of Li3N.

An in situ neutron diffraction measurement of the pressure-temperature evolution of a MgD2:TiD2 mixture (2010)
Journal Article
Moser, D., Bull, D., Cowpe, J., Roach, D., Ross, D., Noreus, D., & Tucker, M. (2010). An in situ neutron diffraction measurement of the pressure-temperature evolution of a MgD2:TiD2 mixture. High Pressure Research, 30(4), 643-652. https://doi.org/10.1080/08957959.2010.533664

The hydrogen storage capacity of Mg–Ti–H films is approximately five times that of conventional metal
hydride electrodes in NiMH-batteries. Mg and Ti are considered to be immiscible in the bulk and the
ambient pressure phase diagram of Mg and Ti in... Read More about An in situ neutron diffraction measurement of the pressure-temperature evolution of a MgD2:TiD2 mixture.

Pressure-dependent deuterium reaction pathways in the Li-N-D system (2010)
Journal Article
Bull, D., Weidner, E., Shabalin, I., Telling, M., Jewell, C., Gregory, D., & Ross, D. (2010). Pressure-dependent deuterium reaction pathways in the Li-N-D system. Physical Chemistry Chemical Physics, 12, 2089-2097. https://doi.org/10.1039/b903821n

Neutron diffraction data from in situ deuteration and dedeuteration of Li3N are presented under
different pressure regimes, whereby reaction pathways differing from the widely reported
stoichiometric pathway of Li3N + 2D22Li2ND + LiD + D22LiND2 + 2... Read More about Pressure-dependent deuterium reaction pathways in the Li-N-D system.

Monte Carlo simulation of quasielastic neutron scattering from localised and long-range hydrogen motion in C15 Laves phase intermetallic compounds (2003)
Journal Article
Bull, D., Broom, D., & Ross, D. (2003). Monte Carlo simulation of quasielastic neutron scattering from localised and long-range hydrogen motion in C15 Laves phase intermetallic compounds. Chemical Physics, 292(2-3), 153-160. https://doi.org/10.1016/S0301-0104%2803%2900155-1

A number of cubic C15 Laves phase intermetallic compounds are able to absorb large amounts of hydrogen. At low solute concentrations, the protons occupy tetrahedral interstitial sites, which form a network of hexagons. It is believed that the motion... Read More about Monte Carlo simulation of quasielastic neutron scattering from localised and long-range hydrogen motion in C15 Laves phase intermetallic compounds.