Neutron diffraction of calcium aluminosilicate glasses and melts

Louis Hennet (1) , James W.E. Drewitt (2) , Daniel R. Neuville (3) , Viviana Cristiglio (4) , Jad Kozaily (1, 4) , Séverine Brassamin (1) , Didier Zanghi (1) , Henry E. Fischer (5)

1 CEMHTI - Conditions Extrêmes et Matériaux : Haute Température et Irradiation
2 SUPA, Centre for Science at Extreme Conditions and School of Physics and Astronomy
3 IPGP - Institut de Physique du Globe de Paris
4 ILL - Institut Laue-Langevin
5 CEP - Climate and Environmental Physics [Bern]

The combination of neutron diffraction with aerodynamic levitation and laser heating, pioneered by Neville Greaves and co-workers about 15 years ago, is an important tool for studying the structure of liquid melts. Since the first work on liquid Al2O3 published in 2001, the technique has been largely improved and experiments are now routinely performed at neutron sources, providing interesting structural information on various materials. In this paper, the structure of glass-forming compounds in the system CaO-Al2O3-SiO2 was measured by applying neutron diffraction with aerodynamic levitation. Results obtained in the liquid state above the melting point and from the glass at room temperatures are presented. Various compositions were studied by increasing the silica content and by changing the ratio CaO/Al2O3. As observed using other methods, the main structural changes relate to modification of the Al-O short range order.

Mots clés: Structure; Calcium aluminosilicates; Glasses; Melts; Neutron diffraction; Aerodynamic levitation

Domaines: Science des matériaux [cond-mat.mtrl-sci]; Matériaux

Louis Hennet, James W.E. Drewitt, Daniel R. Neuville, Viviana Cristiglio, Jad Kozaily, et al.. Neutron diffraction of calcium aluminosilicate glasses and melts. Journal of Non-Crystalline Solids, 2016, 451, pp.89 - 93. ⟨10.1016/j.jnoncrysol.2016.05.018⟩. ⟨hal-01395538⟩