DETERMINATION BY POLARIZED NEUTRON DIFFRACTION OF THE THREE PARTIAL STRUCTURE FACTORS OF A Co81.511B18.5 GLASS

J M Dubois (1) , P. Chieux , Gérard Le Caër , J. Schweitzer , J. Bletry

1 LMPSM - Laboratoire de Métallurgie Physique et Science des Matériaux (URA CNRS 155)

The three partial structure factors (PSF) of a Co81.511B18.5 glass were simultaneously measured by polarized neutron diffraction. A prepeak appears around Q = 2 Å-1 on the nuclear structure factor. The concentration-concentration PSF shows that the boron atoms are only surrounded by cobalt atoms. The following pair distances are deduced from PSF : R(Co-Co) = 2.54 Å, R(Co-B) = 2.3 Å, R(B-B) ≈ 3.6 Å. Finally the PSF calculated for the model of GASKELL are in satisfactory agreement with the measurements while a slight discrepancy is observed between experiment and the SCC FSP calculated for a packing of sticky spheres.

Domaines: Articles anciens

J M Dubois, P. Chieux, Gérard Le Caër, J. Schweitzer, J. Bletry. DETERMINATION BY POLARIZED NEUTRON DIFFRACTION OF THE THREE PARTIAL STRUCTURE FACTORS OF A Co81.511B18.5 GLASS. Journal de Physique Colloques, 1982, 43 (C9), pp.C9-23-C9-29. ⟨10.1051/jphyscol:1982904⟩. ⟨jpa-00222397⟩