Synthesis of biomorphaus SiC-ceramics
Gulicovski, Jelena J.
Bošković, Snežana B.
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The carbothermal reduction processing of partially mineralized fir (Abies alba) samples was used to obtain highly-porous SiC ceramics with cellular structure. The infiltration of TEOS (tetraetilortosilikat, Si(OC2H5)(4)) as a silica source, was conducted in order to carry out the mineralization process. Synthesis of the SiC was achieved with a C/SiO2 replica annealing at 1723 K in Ar atmosphere. The obtained samples were characterised using X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM) and energy dispersive spectrometry (EDS). The experimental results revealed that the hierarchical bimorphous wood structure was preserved even after high-temperature treatment. Microstructural characterization of the ceramics revealed the presence of the beta-SiC phase and traces of the alpha-SiC phase.
Keywords:SiC / wood / biomorphic ceramics / non-oxide ceramics / carbothermal reduction
Source:Hemijska industrija, 2007, 61, 2, 75-78
- 5th Young Researchers Seminar, Dec 25-26, 2006, Belgrade, Serbia