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Spectroscopic Characterization of the Nitridation Process of Polymeric Precursors to SI-M-N-O Systems (M=Ti, Zr, Al)

Published online by Cambridge University Press:  25 February 2011

F. Babonneau  and
G. D. Soraru
F. Babonneau
Affiliation:
Chimie de la Matière Condensée, Université Paris 6, 4 place Jussieu, 75252 Paris, (France)
G. D. Soraru
Affiliation:
Dipartimento di Ingegneria dei Materiali, Universita di Trento, 38050 Mesiano-Trento, (Italy)
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Abstract

A commercial polycarbosilane was modified with various metallic alkoxides to get mixed ceramic precursors in the Si-M-C-O systems (M=Ti, Zr Al). Pyrolysis under ammonia leads to the formation of various ceramic materials depending on the nature of M : Si3N4/TiN, Si3N4/ZrO2 or β′-SiAlON phases.

The polymer-to-ceramics conversion have been studied by MAS-NMR (29 Si, 27Al) and X-ray absorption (Ti K-edge). This paper will show how these two complementary spectroscopic techniques can be used to follow the nitridation process by probing local environments of different elements. In addition, it will be pointed out how X-ray absorption can be a powerful tool for the detection of the crystallization of nitride cubic phases.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 287: Symposium K – Silicon Nitride Ceramics–Scientific and Technological Advances , 1992 , 239
Copyright
Copyright © Materials Research Society 1993

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References

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