The investigation of porosity distribution in a SiC-ceramic using 3D X-raytomography and optical light microscopy

Citation
U. Mucke et al., The investigation of porosity distribution in a SiC-ceramic using 3D X-raytomography and optical light microscopy, PRAKT METAL, 35(12), 1998, pp. 665-672
Citations number
4
Categorie Soggetti
Metallurgy
Journal title
PRAKTISCHE METALLOGRAPHIE-PRACTICAL METALLOGRAPHY
ISSN journal
0032678X → ACNP
Volume
35
Issue
12
Year of publication
1998
Pages
665 - 672
Database
ISI
SICI code
0032-678X(199812)35:12<665:TIOPDI>2.0.ZU;2-B
Abstract
The porosity gradients in both the axial and radial directions of unfired a nd sintered specimens of cylindrical SiC-ceramic bodies manufactured by dry pressing a commercially available SiC-granulate are investigated using 3D X-ray tomography. The porosities determined by X-ray tomography of 180 indi vidual 0.8 x 0.8 x 0.1 mm(3) volume elements of an axially symmetrical Volu me segment are compared with the porosity fractions determined using optica l light microscopic image analysis of the same number of fields of measurem ent, each measuring 0.8 x 0.8 mm(2). Both methods of measurement are shown to yield broadly similar results in respect of the distribution of porosity within the sintered SiC-bodies. The investigations demonstrate the ability of 3D computer tomography to successfully reveal the porosity gradients ex isting in pressed SIC bodies, caused by the forming process used to produce them.