38éme Colloque de Métallurgie de l'INSTN
Les intermétalliques : des superalliages aux quasicristaux

J. Phys. IV France 06 (1996) C2-171-C2-176
DOI: 10.1051/jp4:1996224

Titanium Evolution Under Neutron Irradiation in Ni_xC_1-x/Ti Multilayers

B. Ballot^{1, 2}, K. N'guy^{1, 2}, A. Menelle¹, J. Mimault³, T. Girardeau³, J.L. Rouvière⁴, F. Samuel² and K. AI Usta<sup>2

1</sup>  Laboratoire Léon Brillouin (CEA-CNRS), CE Saclay, 91191 Gif sur Yvette Cedex, France
²  Compagnie Industrielle des Lasers, BP 27, route de Nozay, 91460 Marcoussis, France
³  Laboratoire de Métallurgie Physique, URA 131 du CNRS, 40 av. du Recteur Pineau, 86022 Poitiers Cedex, France
⁴  Laboratoire Structures, CEN Grenoble, 17 rue des Martyrs, 38054 Grenoble Cedex 9, France

Abstract
Supermirrors, which are Ni_xC_1-x/Ti aperiodic multilayers, have become more and more important for use in neutron guides. The effects of neutron radiation on the structural and optical properties of such stacks have been studied to estimate the lifetime of the neutron guides. The results presented here have been obtained by neutron reflectivity, X-ray diffraction, Conversion-Electron Extended X-ray Absorption Fine Structure and High Resolution Transmission Electron Microscopy. It has been observed that the reflecting performances of the supermirrors were not altered by irradiation, but that a structural change did occur in the Ti layers.

© EDP Sciences 1996