Browsing by Author "Greaves, G. N."

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Browsing by Author "Greaves, G. N."

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  • Hennet, L.; Cristiglio, V.; Kozaily, J.; Pozdnyakova, I.; Fischer, H. E.; Bytchkov, A.; Drewitt, J. W. E.; Leydier, M.; Thiaudière, D.; Gruner, S.; Brassamin, S.; Zanghi, D.; Cuello, G. J.; Koza, M.; Magazù, S.; Greaves, G. N.; Price, D. L. (2011-05-30)
    Aerodynamic levitation is an effective way to suspend samples which can be heated with CO2 lasers. The advantages of this containerless technique are the simplicity and compactness of the device, making it possible to ...
  • Hennet, L.; Pozdnyakova, I.; Bytchkov, A.; Drewitt, J.; Kozaily, J.; Leydier, M.; Brassamin, S.; Zanghi, D.; Fischer, H. E.; Greaves, G. N.; Price, D. L. (2011-07-01)
    Using time resolved x-ray diffraction combined with aerodynamic levitation and CO2 laser heating, we have studied the structural evolution of the fragile glass-forming liquid CaAl2O4 during supercooling from the stable ...
  • Van, Q. V.; Marejus, O.; Hennet, L.; Greaves, G. N.; Wilding, Martin C. (2009-12-21)
    Small angle x-ray scattering (SAXS) has been measured in the wavevector range 0.01
  • 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 ...
  • Greaves, G. N.; Kargl, F.; Ward, D.; Holliman, P.; Meneau, F. (American Institute of Physics, 2009-01-29)
    In situ inelastic x-ray scattering (IXS) experiments have been used to probe heterogeneity and deformability in zeolte Y as this thermally collapses to a high density amorphous (HDA) aluminosilicate phase. The Landau-Placzek ...
  • Greaves, G. N.; Wilding, M. C.; Fearn, S.; Langstaff, D.; Kargl, F.; Van, Q. Vu; Hennet, L.; Pozdnyakova, I.; Majérus, O.; Cernik, R. J.; Martin, C. (2008-12-31)
    Modern levitation furnaces are enabling melting and freezing of refractory materials like Al2O3 to be studied in depth with synchrotron radiation techniques. Whilst α-Al2O3 is a close packed Debye-like solid, liquid Al2O3 ...
  • Greaves, G. N.; Wilding, M. C.; Fearn, S.; Kargl, F.; Hennet, L.; Bras, W.; Majerus, O.; Martin, Chris M. (2009-05-01)
    Employing small angle X-ray scattering (SAXS) and wide angle X-ray scattering (WAXS) combined with laser-heated aerodynamic levitation has enabled different transitions in Supercooled yttrium oxide-aluminium oxide to be ...
  • Greaves, G. N.; Wilding, M. C.; Kargl, F.; Hennet, L.; Majerus, O. (2008-06-01)
    An overview is given of recent advances in the experimental physics of supercooled liquids and glasses. These are described in the context of measurements of non-ergodicity, viscosity and low frequency dynamics. Particular ...
  • Greaves, G. N. (Royal Society of Chemistry, 2007-11-01)
  • Winter, Rudolf; Smith, I. H.; Jones, Aled R.; Greaves, G. N. (2005)
    The glass-forming reactions between sodium carbonate (Na2CO3) and silica (SiO2) have been investigated by 23Na, 29Si, and 13C magic-angle spinning (MAS) NMR spectroscopy. The multinuclear MAS NMR approach identifies and ...
  • Greaves, G. N. (ScolarOne, 2011-01-21)
    The physics of critical phenomena is well established in systems as diverse as molecular fluids, crystalline alloys and magnetic materials. As the critical point is approached, the susceptibility increases anomalously and ...
  • Colyer, L. M.; ap Gwynn, Iolo A.; Greaves, G. N.; Sapelkin, A.; Menau, F.; Wade, Stephen (2009-11-03)
    Low-density zeolites collapse to the rigid amorphous state at temperatures that are well below the melting points of crystals of the same composition but of conventional density. Here we show, by using a range of experimental ...
  • Greaves, G. N.; Catlow, C. R. A.; Derbyshire, G. E.; McMahon, M. I.; Nelmes, R. J.; Van der Lann, G. (2008-11-01)
    After over a quarter of a century, the doors of the world's first synchrotron radiation source have closed. Its contribution to materials science in the past and the future should not be underestimated.

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