Hostname: page-component-8448b6f56d-mp689 Total loading time: 0 Render date: 2024-04-24T08:34:44.317Z Has data issue: false hasContentIssue false
  • English
  • Français

Spectroscopic Characterization of a Pre-Ceramic Polymer For Sic/Tic System.

Published online by Cambridge University Press:  28 February 2011

Florence Babonneau ,
Patrice Barre ,
Jacques Livage  and
Michel Verdaguer
Florence Babonneau
Affiliation:
Laboratoire de Chimie de la Matière Condensiée and
Patrice Barre
Affiliation:
Laboratoire de Chimie de la Matière Condensiée and
Jacques Livage
Affiliation:
Laboratoire de Chimie de la Matière Condensiée and
Michel Verdaguer
Affiliation:
Laboratoire de Chimie des Métaux de Transition, Université Pierre et Marie Curie, 4 place Jussieu, 75005 Paris, France.
Get access

Abstract

Polytitanocarbosilane precursor for SiC/TiC ceramics was characterized by various spectroscopic techniques (29Si and 13C CP MAS NMR, Ti K-edge XANES and EXAFS) in order to follow how titanium ions are incorporated into the polycarbosilane-based polymer. This polymer has been fired in argon atmosphere, and the evolution of the local environments of Si and Ti atoms, during the pyrolysis process, have been followed using 29Si MAS-NMR and Ti K-edge X-ray absorption: this study reveals the formation of Si-O bonds above 500°C, while Ti-C bonds clearly appear around 800°C. Above 1000°C, Si-O bonds are consumed by reaction with excess carbon and the system finally crystallizes into SiC/TiC mixture above 1200°C.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 180: Symposium A – Better Ceramics Through Chemistry IV , 1990 , 1035
Copyright
Copyright © Materials Research Society 1990

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

[1] Yajima, S., Okamura, K., Hayashi, J., Omori, M., J. Am. Ceram. Soc. 59, 324 (1976).Google Scholar
[2] Yajima, S., Iwai, T., Yamamura, T., Okamura, K., Hasegawa, Y., J. Mater. Sci. 16, 1349 (1981).Google Scholar
[3] Yamamura, T., Ishikawa, T., Shibuya, M., Hisayuki, T., Okamura, K., J. Mater. Sci. 23, 2589 (1988).Google Scholar
[4] Babonneau, F., Doeuff, S., Léustic, A., Sanchez, C., Cartier, C., Verdaguer, M., Inorg. Chem. 27, 3166 (1988).Google Scholar
[5] Song, Y.C., Hasegawa, Y., Yang, S.J., Sato, M. J. Mater. Sci. 23, 1911 (1988).Google Scholar
[6] Babonneau, F., Livage, J., Sorarù, G.D., Carturan, G., Mackenzie, J.D. New J. Chem. (in the press).Google Scholar
[7] Babonneau, F., Soraru, G.D., Mackenzie, J.D. J. Mater. Sci. (in the press).Google Scholar