Biomorphous SiC ceramics prepared from cork oak as precursor |
| |
| Affiliation: | 1. V. Lashkaryov Institute of Semiconductor Physics, NAS of Ukraine, 41, Prospekt Nauky, 03028 Kyiv, Ukraine;2. Nanomedtech LLC, 68, Gorky Street, 03680 Kyiv, Ukraine;3. School of Engineering and Applied Science, Aston University, Aston Triangle, Birmingham, B4 7ET, UK;4. Institute of Innovative Science and Technology, Tokai University, Hiratsuka, Kanagawa 259-1292, Japan;1. Department of Physics, University of Calcutta, 92 A P C Road, Kolkata 700 009, India;2. Department of Physics, Raiganj University, Uttar Dinajpur 733 134, India;3. Physical Metallurgy Group, Indira Gandhi Centre for Atomic Research, Kalpakkam 603 102 India;4. Center for Research in Nanoscience and Nanotechnology, University of Calcutta, JD-2, Sector-III, Saltlake City, Kolkata 700 098, India;1. University of Ioannina, Dept. of Materials Science and Engineering, Ioannina GR-45110, Greece;2. Laboratoire MATEIS, INSA Lyon, 7 Avenue Jean Capelle, 69621 Villeurbanne Cedex, France;1. Department of Electrical and Electronics Engineering, Atilim University, 06836 Ankara, Turkey;2. Department of Physics, Middle East Technical University, 06800 Ankara, Turkey;3. Virtual International Scientific Research Centre, Baku State University, 1148 Baku, Azerbaijan;1. Instituto de Física, Universidade de São Paulo, Rua do Matão, Travessa R, 187, São Paulo, CEP 05508-090 SP, Brazil;2. Departamento de Ciências do Mar, Universidade Federal de São Paulo, Santos, SP, Brazil;1. Erich Schmid Institute of Materials Science, Austrian Academy of Sciences, Jahnstrasse 12, 8700 Leoben, Austria;2. University of Vienna, Physics of Nanostructured Materials, Boltzmanngasse 5, 1090 Wien, Austria |
| |
| Abstract: | ![]()
Porous ceramic materials of SiC were synthesized from carbon matrices obtained via pyrolysis of natural cork as precursor. We propose a method for the fabrication of complex-shaped porous ceramic hardware consisting of separate parts prepared from natural cork. It is demonstrated that the thickness of the carbon-matrix walls can be increased through their impregnation with Bakelite phenolic glue solution followed by pyrolysis. This decreases the material’s porosity and can be used as a way to modify its mechanical and thermal characteristics. Both the carbon matrices (resulted from the pyrolysis step) and the resultant SiC ceramics are shown to be pseudomorphous to the structure of initial cork. Depending on the synthesis temperature, 3C-SiC, 6H-SiC, or a mixture of these polytypes, could be obtained. By varying the mass ratio of initial carbon and silicon components, stoichiometric SiC or SiC:С:Si, SiC:С, and SiC:Si ceramics could be produced. The structure, as well as chemical and phase composition of the prepared materials were studied by means of Raman spectroscopy and scanning electron microscopy. |
| |
| Keywords: | Biomorphous SiC ceramics Cork Pyrolysis SiC synthesis Raman scattering Scanning electron microscopy |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
