A FIM AP INVESTIGATION ON THE ORDERING PROCESS AND ANTIPHASE DOMAIN BOUNDARIES IN NI3FE ALLOY

Field Ion Microscope (FIM) and Atom Probe (AP) have been used to inves tigate the ordering process and antiphase domain boundaries (APB) in t he {200} atomic planes in Ni3Fe alloy. Although the ordering transitio n is of the continuous or homogeneous type, the ordering process is no t homogeneous in various domains of the specimen. The conservative and non-conservative APBs in the {200} planes have been recorded by FIM m icrographs and AP ladder diagrams from layer by layer analyses. The ex perimental results about APBs are discussed in terms of formation ener gy.