From Northwestern University Center for Atom-Probe Tomography
Jump to navigation Jump to search
3D APT of a model NiALCr superalloy

γ’-Ni3(Al,Cr) precipitates such as the one imaged above are responsible for the high-temperature strength of Ni-Based Superalloys. The spheroidal γ’-precipitate of radius ca. 9 nm is delineated from the γ-matrix phase by a 10.5 at.% aluminum isoconcentration surface. {110} planes are clearly defined by aluminum (red) and chromium atoms (blue), while Ni atoms are omitted for clarity. This image was obtained using a Local Electrode Atom Probe (LEAP®) from Imago Scientific Instruments