CHANGEMENTS DE PHASES ET MICROSTRUCTURES
J. Phys. IV France 04 (1994) C3-35-C3-40
Le rôle des techniques de sonde atomique dans l'investigation des transformations de phaseD. BLAVETTE, F. DANOIX and P. AUGER
Laboratoire de Microscopie Ionique, URA 808 UFR Sciences, Université de Rouen, 76821 Mont Saint Aignan cedex, France
The role of both Field Ion Microscopy and Atom-Probe techniques in the investigation of solid state phase transformations is discussed on the basis of some examples. The first illustration deals with Long Period Superstructures observed in Cu3 Pd system. Atom-probe investigations conducted on (001) planes show the occurence of Long Range Order modulations in the vicinity of antiphase boundaries. Because of its very high spatial resolution, atom-probe is also an attractive tool for the study of unmixing processes. Some results related to the spinodal decomposition of the iron-chromium system are discussed in connection with current unmixing theories. Prospects opened by the emergence of new three-dimensional atom-probes are given.
© EDP Sciences 1994