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Nanodomain Structure of Carbon-Rich Silicon Carbonitride Polymer-Derived Ceramics

Mera, Gabriela and Tamayo, Aitana and Nguyen, Hong and Sen, Sabyasachi and Riedel, Ralf (2010):
Nanodomain Structure of Carbon-Rich Silicon Carbonitride Polymer-Derived Ceramics.
In: Journal of the American Ceramic Society, Wiley, pp. 1169-1175, 93, (4), ISSN 00027820,
[Online-Edition: http://dx.doi.org/10.1111/j.1551-2916.2009.03558.x],
[Article]

Abstract

The presence of nanodomains in polymer-derived ceramics constitutes one of the most intriguing features of this class of materials. In the present work, the nanostructure of novel carbon-rich silicon carbonitride (SiCN) ceramics synthesized via thermolysis of poly(methylphenylsilylcarbodiimide), –[Ph(CH3) Si-NCN]n–, at 1300°, 1500°, 1700°, and 2000°C is investigated by micro-Raman spectroscopy, X-ray powder diffractometry, and small-angle X-ray scattering (SAXS). The structural information obtained from these experimental methods is combined together with theoretical modeling of the SAXS data to obtain a detailed model of the temperature-dependent evolution of nanodomains comprised of free carbon, SiC, and Si3N4 in SiCN-based ceramics.

Item Type: Article
Erschienen: 2010
Creators: Mera, Gabriela and Tamayo, Aitana and Nguyen, Hong and Sen, Sabyasachi and Riedel, Ralf
Title: Nanodomain Structure of Carbon-Rich Silicon Carbonitride Polymer-Derived Ceramics
Language: English
Abstract:

The presence of nanodomains in polymer-derived ceramics constitutes one of the most intriguing features of this class of materials. In the present work, the nanostructure of novel carbon-rich silicon carbonitride (SiCN) ceramics synthesized via thermolysis of poly(methylphenylsilylcarbodiimide), –[Ph(CH3) Si-NCN]n–, at 1300°, 1500°, 1700°, and 2000°C is investigated by micro-Raman spectroscopy, X-ray powder diffractometry, and small-angle X-ray scattering (SAXS). The structural information obtained from these experimental methods is combined together with theoretical modeling of the SAXS data to obtain a detailed model of the temperature-dependent evolution of nanodomains comprised of free carbon, SiC, and Si3N4 in SiCN-based ceramics.

Journal or Publication Title: Journal of the American Ceramic Society
Volume: 93
Number: 4
Publisher: Wiley
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Dispersive Solids
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 11 Apr 2012 11:27
Official URL: http://dx.doi.org/10.1111/j.1551-2916.2009.03558.x
Identification Number: doi:10.1111/j.1551-2916.2009.03558.x
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