Focused ion beam/scanning electron microscopy tomography and conventional transmission electron microscopy assessment of M_4Ti_3 morphology in compression-aged Ni-rich Ni-Ti single crystals

摘要

The size, morphology and configuration of Ni_4Ti_3 precipitates in a single-crystal Ni-Ti alloy have been investigated by two-dimensional transmission electron microscopy-based image analysis and three-dimensional reconstruction from slice-and-view images obtained in a focused ion beam/scanning electron microscopy (FIB/SEM) dual-beam system. Average distances between the precipitates measured along the compression direction correlate well between both techniques, while particle shape and configuration data is best obtained from FIB/SEM. Precipitates form pockets of B2 of 0.54 mu m in the compression direction and 1 urn perpendicular to the compression direction.