Abstract

The techniques of transmission electron microscopy (TEM) and atom probe field-ion microscopy (APFIM) are well suited to the detailed characterization of complex microstructures. The morphological and crystallographic data can be obtained through TEM-based techniques, whereas APFIM can provide detailed morphological information concerning fine-scale microstructures and quantitative microchemical data for all elements with very high spatial resolution. The combined use of these analytical techniques is extremely valuable for the study of phase transformations. The complementary nature of TEM and APFIM techniques is demonstrated through the examination of spinodal decomposition within the low-temperature miscibility gap, and through the identification of two additional phases which form in an Fe-25 at% Be alloy.

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