Atom-probe investigations of fine-scale features in intermetallics

Intermetallics have been studied by means of Atom Probe Field Ion Microscop y. Atom-Probe techniques have been used to determine the phase composition and to study the role and the influence of additional elements. The use of the Tomographic Atom Probe makes it possible to map out the distribution of chemical species in a small volume of the material at a near atomic scale. This has been particularly used in order to study segregation of additiona l elements at interfaces or planar and linear defects in TiAl base and FeAl base alloys. (C) 2001 Elsevier Science Ltd. All rights reserved.