Studies on High Temperature Evolution of Polymer Derived Nano SiC Ceramics

Abstract:

Borosiloxane oligomers, which give ceramic residue in the range of 70-78% (at 900°C) in inert atmosphere, were synthesized through the condensation of boric acid with allyltriethoxysilane without using any catalyst. The effect of concentration of the reactants on the processibility, yield and thermal stability of the product obtained was studied. All oligomers were pyrolysed at 900°C followed by ceramic conversion after sintering at 1500°C and 1650°C in inert atmosphere and were characterized by XRD and spectroscopic techniques. Mixture of α and β-SiC are formed after sintering the samples at 1650°C for 3 hours in inert atmosphere.

• Periodical: Materials Science Forum (Volumes 830-831)
• Pages: 493-497
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.830-831.493
• Online since: September 2015
• Authors: T.S. Sasikala, Deepa Devapal
• Keywords: Allyltriethoxysilane, Borosiloxanes, Ceramic, Ceramic Conversion, Sintering

References

[1] S. Yajima, T. Shishido, M. Hamano, SiC and Si3N4 sintered bodies with new borodiphenylsiloxane polymers as binder, Nature 266 (1977) 522.

DOI: 10.1038/266522a0

[2] R. L. Siqueira, I.V. P. Yoshida, L.C. Pardini, M. A. Schiavon, Poly(borosiloxanes) as precursors for carbon fiber ceramic matrix composites, Mater. Res. 10 (2007)147.

DOI: 10.1590/s1516-14392007000200009

[3] D. Devapal, S. Packirisamy, K. J. Sreejith, P. V. Ravindran, B. K. George, Synthesis, Characterization and Ceramic Conversion Studies of Borosiloxane Oligomers from Phenyltrialkoxysilanes, J. Inorg. Organomet. . Poly. 20 (2010)666.

DOI: 10.1007/s10904-010-9380-7

[4] S. Yajima, J. Hayashi, K. Okamura, Pyrolysis of a polyborodiphenylsiloxane, Nature 266 (1977) 521.

DOI: 10.1038/266521a0

[5] P. Colombo, R. Riedel, G. D. Soraru, H. J. Kleebe, DEStech publications. (2009) 169.

[6] G. Ramis, P. Quintarel, M. Cauchetier, G. Busca, V. Lorinzelli, Surface Chemistry and Structure of Ultrafine Silicon Carbide: An FT-IR Study J. Am. Ceram. Soc. 72 (1989) 1692.

DOI: 10.1111/j.1151-2916.1989.tb06304.x

[7] N. Janakiraman, M. Weinmann, J. Schuhmacher, K. Muller, J. Bill, F. Aldinger, Thermal stability, Phase evolution, and Crystallization in Si-B-C-N ceramics derived from a Polyborosilazane Precursor, J. Am. Cer. Soc. 85 (7) (2002)1808.

DOI: 10.1111/j.1151-2916.2002.tb00357.x

[8] H.W. Bai, G. Wen, X. X. Huang, Z. X. Han, B. Zhong, Z. X. Hu , X. D. Zhang, Synthesis and structural characterization of SiBOC ceramic fibers derived from single-source polyborosiloxane, J. Europ. Ceram. Soc. 31 (2011) 931–940.

DOI: 10.1016/j.jeurceramsoc.2010.11.020

[9] A. Tamayo, R. Peña-Alonso., F. Rubio., J. Rubio., J.L. Oteo., Synthesis and characterization of boron silicon oxycarbide glass fibers, J. of Non-Cryst. Solids 358 (2012) 155.

DOI: 10.1016/j.jnoncrysol.2011.09.002