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      Microstructural analysis of a C/SiC ceramic based on the segmentation of X-ray phase contrast tomographic data

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          Abstract

          This paper is dedicated to the analysis of 3D data of carbon fiber reinforced silicon carbide ceramics. In the production process of C/SiC, a porous carbon preform reinforced with bundles of carbon fibers is infiltrated with liquid silicon at approximately 1 500 °C. The reaction between liquid silicon and carbon creates a layer of silicon carbide while the silicon vanishes almost completely. This material is able to withstand extremely high temperatures and it is extremely tough with respect to fracture. To increase the efficiency of the costly and time consuming production process, methods for monitoring the quality of the material are helpful. For instance, the thickness of the silicon carbide layer is a valuable measure. Moreover, due to different coefficients of thermal expansion of the components, typically cracks appear during the production process. For effective analysis 3D high resolution image data are necessary that can be acquired by synchrotron computed tomography. In a first image processing step, we segment the 3D image data with a convex optimization approach incorporating spatial regularity. Further, we work on the detection of cracks using an eigenvalue analysis of the 3D Hessian matrix determined in each pixel.

          Most cited references14

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          A new method for gray-level picture thresholding using the entropy of the histogram

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            A new method for the model-independent assessment of thickness in three-dimensional images

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              Ilastik: Interactive learning and segmentation toolkit

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                Author and article information

                Journal
                ijmr
                International Journal of Materials Research
                Carl Hanser Verlag
                1862-5282
                2195-8556
                14 July 2014
                : 105
                : 7
                : 702-708
                Affiliations
                a Fraunhofer ITWM, Kaiserslautern, Germany
                b European Synchrotron Radiation Facility, Grenoble, France
                c University of Kaiserslautern, Kaiserslautern, Germany
                d Fraunhofer ISC, Würzburg, Germany
                Author notes
                [* ] Correspondence address, Dr. Oliver Wirjadi, Fraunhofer ITWM, Fraunhofer-Platz 1, 67663 Kaiserslautern, Germany, Tel: +49-(0)631-31600-4396, Fax: +49-(0)631-31600-5396, E-mail: oliver.wirjadi@ 123456itwm.fraunhofer.de
                Article
                MK111071
                10.3139/146.111071
                eb232e7c-7de7-4b1f-91e5-673b0de3d793
                © 2014, Carl Hanser Verlag, München
                History
                : 30 September 2013
                : 25 February 2014
                : 24 April 2014
                Page count
                References: 26, Pages: 7
                Categories
                Original Contributions

                Materials technology,Materials characterization,Materials science
                Intrinsic volume densities,Microtomography,Convex optimization,3D image analysis,Local shape analysis

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