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Three dimensional X-ray diffraction contrast tomography reconstruction of polycrystalline strontium titanate during sintering and electron backscatter diffraction validation

: Syha, M.; Reinheimer, W.; Loedermann, B.; Graff, A.; Trenkle, A.; Baeuer, M.; Weygand, D.; Ludwig, W.; Gumbsch, P.


Li, M.; Campbell, C.; Thornton, K.; Holm, E.A.; Gumbsch, P. ; The Minerals, Metals and Materials Society -TMS-, Warrendale/Pa.:
2nd World Congress on Integrated Computational Materials Engineering, ICME 2013. Proceedings : TMS ICME - manufacturing, design, materials, held July 7 - 11, 2013 at Salt Lake Marriott Downtown at City Creek, Salt Lake City, Utah
Hoboken, NJ: Wiley, 2013
ISBN: 1-118-76689-X
ISBN: 978-1-118-76689-7
World Congress on Integrated Computational Materials Engineering (ICME) <2, 2013, Salt Lake City/Utah>
Fraunhofer IWM ()
diffraction contrast tomography; sintering; EBSD; 3D materials characterization

The microstructural evolution of polycrystalline strontium titanate was investigated in three dimensions (3D) using X-ray diffraction contrast tomography (DCT) before and after ex-situ annealing at 1600°C. Post-annealing, the specimen was additionally subjected to phase contrast tomography (PCT) in order to finely resolve the porosities. The resulting microstructure reconstructions were studied with special emphasis on morphology and interface orientation during microstructure evolution. Subsequently, cross-sections of the specimen were studied using electron backscattered diffraction (EBSD). Corresponding cross-sections through the 3D reconstruction were identified and the quality of the reconstruction is validated with special emphasis on the spatial resolution at the grain boundaries, the size and location of pores contained in the material and the accuracy of the orientation determination.