Correlative nano-computed tomography and focused ion-beam sectioning. A case study on a Co-base superalloy oxide scale

Herein, the capabilities of a correlative tomography approach combining laboratory nano X-ray computed tomography, focused ion-beam sectioning, and energy-dispersive X-ray spectroscopy are utilized for the characterization of multilayered oxide scales of Co-base superalloys regarding their 3D morphology and chemical composition. The combination of complementary 3D imaging techniques allows for a precise and reliable segmentation of the pore space, oxide precipitates, and different phases of the initial material. Such information is instrumental to a microscopic understanding of oxidation in this new class of superalloys and key to improvement of oxidation resistance in the next-generation high-temperature materials. (© 2019 The Authors. Published by WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)