%0 Journal Article %J Nuclear Instruments & Methods in Physics Research Section B-Beam Interactions with Materials and Atoms %D 2003 %T X-ray tomographic imaging of Al/SiCp functionally graded composites fabricated by centrifugal casting %A Velhinho A %A Sequeira PD %A Martins R %A Vignoles G %A Fernandes FB %A Botas JD %A Rocha LA %P 295-302 %V 200 %X

The present work refers to an X-ray microtomography experiment aiming at the elucidation of some aspects regarding particle distribution in SiC-particle-reinforced functionally graded aluminium composites.
Precursor composites were produced by rheocasting. These were then molten and centrifugally cast to obtain the
functionally graded composites. From these, cylindrical samples, around 1 mm in diameter, were extracted, which were then irradiated with a X-ray beam produced at the European Synchrotron Radiation Facility.
The 3-D images were obtained in edge-detection mode. A segmentation procedure has been adapted in order to
separate the pores and SiC particles from the Al matrix. Preliminary results on the particle and pore distributions are presented.

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