Functionally Graded Porosity in Ceramics ‐ Analysis with High Resolution Computed Tomography

摘要: The characterization of graded materials requires methods mapping local varying properties materials. One the most useful tools is high-resolution computed tomography. ability to view inside samples could beused determine several features like density variation, porosity distribution and other structural parameters. With one two 3D-tomographs developed at BAM, a spatial resolution about 2 μm can be reached dependent object diameter. As radiation source, micro focus X-ray tube with transmission target used together cooled CCD camera fiber optic coated thin scintillate layer. Ceramic membranes capillary pores (e.g. Hydroxylapatite, TiO ) are analyzed CT image processing. Beside variation pore diameter, which in range 3 30 pm, throughput capillaries their structure was measured analyzed.