Browsing by Author "Benmore, C. J."

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Browsing by Author "Benmore, C. J."

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  • Wilding, M. C.; Benmore, C. J.; Weber, J. K. R. (2010-01)
    X-ray diffraction data have been collected in situ for a series of magnesium silicate liquids between and including the two mineral compositions enstatite and forsterite (MgSiO3 and Mg2SiO4). The pair distribution functions ...
  • Greaves, G. N.; Wilding, M. C.; Hennet, L.; Langstaff, D.; Kargl, F.; Benmore, C. J.; Weber, J. K. R. (2011-03-18)
    We welcome efforts made by Barnes et al to study liquid-liquid transitions (LLT) in supercooled Y2O3x-Al2O3(100-x) or AYx melts reported in a recent Letter [1]. The first order LLT in AY20, which we have identified in situ ...
  • Greaves, G. N.; Wilding, M. C.; Langstaff, D.; Kargl, F.; Hennet, L.; Benmore, C. J.; Weber, J. K. R.; Van, Q. Vu; Majerus, O.; McMillan, P. F. (2011-01-15)
    By extending recent work on liquid-liquid transitions in supercooled yttria-alumina AYx liquids we draw attention to the compositional dependence of the structure factor of the high density liquid, arguing that this is ...
  • Wilding, Martin C.; Benmore, C. J.; Tangeman, J. A.; Sampath, S. (2004-07)
    Glasses made from the magnesium silicate minerals enstatite (MgSiO3) and forsterite (Mg2SiO4) and three intermediate compositions can be considered as analogues of quenched melts from the Earth and Lunar mantle. Combined ...
  • Mei, Q.; Benmore, C. J.; Siewenie, J.; Weber, J. K. R.; Wilding, M. C. (2008-06-18)
    A series of four (CaO)x·(Al2O3)(1−x) glasses over the narrow compositional range x = 57.1–66.7 have been studied using high energy x-ray and neutron diffraction. The coordination number of oxygen around aluminum was ...
  • Mei, Q.; Benmore, C. J.; Weber, J. K. R.; Wilding, M.; Kim, J.; Rix, J. (2008-06-18)
    High energy x-ray diffraction measurements have been performed on CaO–Al2O3 liquids suspended in a flow of pure argon for six compositions containing 50–67 mol% CaO. The results indicate that AlO4 tetrahedra dominate the ...
  • Wilding, M. C.; Benmore, C. J.; Weber, J. K. R. (2010-05-06)
    Containerless high energy X-ray diffraction measurements have been performed on molten Al2O3-SiO2 as a function of composition. The data show a strong distortion of the SiO4 tetrahedral units and a breakdown of intermediate ...
  • Benmore, C. J.; Soignard, E.; Guthrie, M.; Amin, S. A.; Weber, J. K. R.; McKiernan, K.; Wilding, M. C.; Yarger, J. L. (2011-07-01)
    The structure factors of Mg2SiO4 glass have been measured using high energy x-ray diffraction up to pressures of 30.2 GPa, and the equation of state measured up to 12.8 GPa. The average Mg-O coordination numbers were ...
  • Benmore, C. J.; Wilding, Martin C.; Weber, J. K. R. (2009-12-21)
    Primitive MgO-SiO2 liquids dominate the early history of the Earth and Terrestrial planets. The structures of these liquids and structure-dependent properties, such as viscosity and diffusion, are considered important in ...
  • Wilding, M. C.; Benmore, C. J.; Weber, J. K. R.; Parise, J. B. (2011)
    This paper will describe the results of in situ high-energy X-ray measurements performed on stable and supercooled oxide liquids using containerless techniques. As will be discussed in the companion paper (Weber et al.), ...
  • Mei, Q.; Wilding, Martin C.; Benmore, C. J.; Weber, J. K. R. (2010-01-21)
    High energy, high flux X-ray sources enable new measurements of liquid and amorphous materials in extreme conditions. Aerodynamic levitation in combination with laser beam heating can be used to access high purity and ...
  • Weber, J. K. R.; Benmore, C. J.; Jennings, G.; Wilding, M. C.; Parise, J. B. (2010-12-21)
    Probing the structure of non-equilibrium melts is important to advance the fundamental understanding of liquids and glass formation and development of new materials Combined use of high flux high energy X-rays and fast ...
  • Kohara, S.; Akola, J.; Morita, H.; Suzuya, K.; Weber, J. K. R.; Wilding, M. C.; Benmore, C. J. (2011-09-06)
    The atomic structures of magnesium silicate melts are key to understanding processes related to the evolution of the Earth's mantle and represent precursors to the formation of most igneous rocks. Magnesium silicate ...
  • Wilding, Martin C.; Benmore, C. J. (2006-01)
    The liquid state dominates terrestrial and planetary processes. The history of the early solar system for example involved the accretion of primarily molten bodies. In cooler temperature regimes, interplanetary dust, comets ...
  • Benmore, C. J.; Weber, J. K. R.; Wilding, M. C.; Du, J.; Parise, J. B. (2010-12-07)
    X-ray diffraction measurements performed on aerodynamically levitated CaSiO(3) droplets have been interpreted using a structurally heterogeneous liquid-state model. When cooled, the high-temperature liquid shows evidence ...

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