J. Phys. Colloques
Volume 48, Numéro C6, Novembre 198734th International Field Emission Symposium / 34ème Symposium International d'Emission de Champ
|Page(s)||C6-385 - C6-390|
J. Phys. Colloques 48 (1987) C6-385-C6-390
ORDERING IN Ni4Mo : AN APFIM/TEM/HVEM STUDYM.K. Miller, E.A. Kenik et T.A. Zagula
Metals and Ceramics Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831-6376, U.S.A.
A combined atom probe field-ion microscopy, transmission electron microscopy and high voltage electron microscopy study has been performed to investigate the various ordering phenomena in a high purity Ni4Mo alloy. A disordered material was produced by low temperature high voltage (1 MeV) electron irradiation to a dose of approximately 0.4 displacements per atom. No short range order was observed during the disordering of the long range ordered material. The disordered material was found to have a statistically random distribution of molybdenum. In-situ annealing experiments of the disordered material in the temperature range 300 to 700°C, revealed that SRO occurred prior to the LRO state. In short range ordered material produced by thermal annealing solution treated and quenched material, no statistical evidence for microdomains, clustering or a periodic composition fluctuation was observed with the atom probe.