From Northwestern University Center for Atom-Probe Tomography
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FIM Image

A field-ion micrograph displaying platelet-shaped molybdenum nitride precipitates with {100}-habit planes in an internally nitrided Fe-2at.% Mo-0.5at.%Sn alloy. Each bright dot represents a single atom in the surface of the FIM tip. The lines of bright dots are the traces of nitride platelets cutting through the approximately hemispherical surface of the apex of the FIM tip, resulting in three sets of lines representing the three {100} habit plane variants. The two concentric circles below the center of the micrograph are the two atomic layers of a platelet tangential to the tip surface, at a (100) pole.