Control of functional characteristics of biomorphous carbon matrices, SiC-Si-C composites, and SiC-C ceramics by prepressing wood

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• 作者：A. E. Ershov (1)
  N. V. Klassen (1)
  
  1. Institute of Solid State Physics ; Russian Academy of Sciences ; Chernogolovka ; Moscow oblast ; Russia
  
• 关键词：biomorphous ceramics ; silicon carbide ; gradient structures ; pressing of wood ; electrical resistivity ; pyrolysis
• 刊名：Inorganic Materials: Applied Research
• 出版年：2015
• 出版时间：January 2015
• 年：2015
• 卷：6
• 期：1
• 页码：79-90
• 全文大小：3,501 KB
• 参考文献：1. Byrne, C.E. and Nagle, D.C., Carbonization of wood for advanced materials applications, / Carbon, 1991, vol. 35, pp. 259鈥?66. CrossRef
  2. Greil, P., Lifka, T., and Kaindl, A., Biomorphic cellular silicon carbide ceramics from wood. I. Processing and microstructure, / J. Eur. Ceram. Soc., 1998, vol. 18, pp. 1961鈥?973. CrossRef
  3. Greil, P., Lifka, T., and Kaindl, A., Biomorphic cellular silicon carbide ceramics from wood. II: Mechanical properties, / J. Eur. Ceram. Soc., 1998, vol. 18, pp. 1975鈥?983. CrossRef
  4. de Arellano-Lopez, A.R., Martinez-Fernandez, J., Gonzalez, P., Dominguez, C., Fernandez-Quero, V., and Singh, M., Biomorphic SiC: A new engineering ceramic material, / Int. J. Appl. Ceram. Technol., 2004, no. 1, pp. 56鈥?7.
  5. Parfen鈥檈va, L.S., Orlova, T.S., Kartenko, N.F., Sharenkova, N.V., Smirnov, B.I., Smirnov, I.A., Misiorek, H., Jezowski, A., Wilkes, T.E., and Faber, K.T., Thermal conductivity of high-porosity biocarbon precursors of white pine wood, / Phys. Solid State, 2008, vol. 50, pp. 2245鈥?255. CrossRef
  6. Orlova, T.S., Il鈥檌n, D.V., Smirnov, B.I., Smirnov, I.A., Sepulveda, R., Martinez-Fernandez, J., and de Arellano-Lopez, A.R., Electrical properties of bio-SiC and Si components of the SiC/Si biomorphic composite, / Phys. Solid State, 2007, vol. 49, pp. 205鈥?10. CrossRef
  7. Parfen鈥檈va, L.S., Orlova, T.S., Kartenko, N.F., Sharenkova, N.V., Smirnov, B.I., Smirnov, I.A., Misiorek, H., Jezowski, A., Mucha, J., de Arellano-Lopez, A.R., Martinez-Fernandez, J., and Varela-Feria, F.M., Thermal and electrical properties of a white-eucalyptus carbon preform for SiC/Si ecoceramics, / Phys. Solid State, 2006, vol. 48, pp. 441鈥?46. CrossRef
  8. Khukhryanskii, P.N., / Pressovanie drevesiny (Pressing of Timber), Moscow: Lesn. Promyshl., 1964, 3rd ed.
  9. Yan, Z.L., Liu, J., Zhang, J.C., Ma, T., and Li, Z.C., Comparative study of biomorphic silicon/silicon carbide ceramic from birch and compressed birch, / Key Eng. Mater., 2010, vol. 434鈥?35, pp. 609鈥?12. CrossRef
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Inorganic Chemistry
  Russian Library of Science
  Industrial Chemistry and Chemical Engineering
  
• 出版者：MAIK Nauka/Interperiodica distributed exclusively by Springer Science+Business Media LLC.
• ISSN：2075-115X

文摘

It is found that the prepressing of wood semiproducts intended for producing carbon and silicon carbide matrices by sequential exposure to pyrolysis and silicization with the targeted adjustment of the pressing parameters makes it possible to control the phase composition, morphology, and functional characteristics of carbon and silicon carbide products over a wide range. It is shown that a significant reduction in the porosity of wood induced by uniform compression results in the extraction of the mineral impurities present in the wood to the outer surfaces of the samples during pyrolysis and thus increases the chemical purity of the resulting carbon. It is revealed that the axial compression of wood leads to the formation of a wavelike profile of the intercellular carbon walls of a micron scale. It is shown that, using inhomogeneous deformation, it is possible to prepare silicon carbide ceramics with large controlled gradients of phase composition, electrical conductivity, and other properties that can significantly improve the functional characteristics of electric heaters and other products based on silicon carbide.