ANALYSIS OF THE DO3 SUPERLATTICE IN ORDERED IRON ALUMINIUM ALLOYS BY FIM AND ATOM PROBE

H.-J. Krause-Habrock , G. Frommeyer , J. Wittig , M. Kreuss

The perfection of the ordered DO3 structure in Fe-(20/26/30 at%) Al alloys has been studied using field ion microscopy (FIM), atom probe (AP) measurements, and transmission electron microscopy (TEM) dark field (DF) imaging. FIM images provide a means to qualitatively characterize the degree of order in these materials. However, AP surveys of [111] poles supply additional information concerning the local perfection of the DO3 superlattice. Although the microstructure can appear completely ordered in both FIM and TEM-DF images, the AP investigations have revealed that perfect DO3 order occurs in only limited regions (10 to 20 unit cells) while many imperfections are always present in the atomic arrangements of the DO3 structure.

Domaines: Articles anciens

H.-J. Krause-Habrock, G. Frommeyer, J. Wittig, M. Kreuss. ANALYSIS OF THE DO3 SUPERLATTICE IN ORDERED IRON ALUMINIUM ALLOYS BY FIM AND ATOM PROBE. Journal de Physique Colloques, 1988, 49 (C6), pp.C6-365-C6-371. ⟨10.1051/jphyscol:1988663⟩. ⟨jpa-00228160⟩