A FIM-AP investigation on the ordering process and antiphase domain boundaries in Ni 3Fe alloy

Abstract

Field Ion Microscope (FIM) and Atom Probe (AP) have been used to investigate the ordering process and antiphase domain boundaries (APB) in the {200} atomic planes in Ni 3Fe alloy. Although the ordering transition is of the continuous or homogeneous type, the ordering process is not homogeneous in various domains of the specimen. The conservative and non-conservative APBs in the {200} planes have been recorded by FIM micrographs and AP ladder diagrams from layer by layer analyses. The experimental results about APBs are discussed in terms of formation energy.