Volume 58, Number 2, April 2002
|Page(s)||243 - 249|
|Section||Condensed matter: structure, mechanical and thermal properties|
|Published online||01 December 2003|
Long-range atomic order in irradiated
Institut Laue-Langevin - 6 Rue Jules Horowitz, B.P. 156 X Grenoble Cedex 9, France
2 Victoria University of Technology - P.O. Box 14428, MCMC 8001, Australia
3 ANSTO - PMB 1, Menai NSW, 2234, Australia
4 School of Science, Griffith University - Brisbane 4111, Australia
Accepted: 25 January 2002
Atomic short-range order is commonly observed in alloys via a diffuse () peak in neutron diffraction patterns. There has been speculation for many years on the existence and nature of any corresponding long-range order. A sample of has been irradiated in a high fast-neutron flux to produce a large number of crystal defects at around room temperature and thus facilitate the ordering process. Measurements of the diffuse neutron scattering from this sample demonstrate that long-range order has been induced in the sample, as evidenced by at least five Bragg peaks. This order is not seen in a reference sample prepared in identical fashion except for the irradiation. The Cowley short-range order parameters for both samples are calculated and a candidate structure for the long-range order is proposed.
PACS: 61.50.Ks – Crystallographic aspects of phase transformations; pressure effects / 61.72.Ji – Point defects (vacancies, interstitials, color centers, etc.) and defect clusters / 61.80.Hg – Neutron radiation effects
© EDP Sciences, 2002
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.