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 characterized 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 P-SiC phase and traces of the a-SiC phase.
[1]
Jiping Wang,et al.
Preparation of biomorphic SiC ceramic by carbothermal reduction of oak wood charcoal
,
2004
.
[2]
Peter Greil,et al.
Biomorphic cellular silicon carbide ceramics from wood : II. Mechanical properties
,
1998
.
[3]
Peter Greil,et al.
Biomorphic Cellular Silicon Carbide Ceramics from Wood: I. Processing and Microstructure
,
1998
.
[4]
Zhihao Jin,et al.
Preparation and characterization of porous, biomorphic SiC ceramic with hybrid pore structure
,
2006
.
[5]
E. Vogli,et al.
Effect of microstructure on the fracture behavior of biomorphous silicon carbide ceramics
,
2002
.