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Carbon Mobility in SiOC/HfO2Ceramic Nanocomposites

Nonnenmacher, Katharina and Kleebe, Hans-Joachim and Rohrer, Jochen and Ionescu, Emanuel and Riedel, Ralf and Soraru, G. (2013):
Carbon Mobility in SiOC/HfO2Ceramic Nanocomposites.
In: Journal of the American Ceramic Society, Wiley-VCH Verlag GmbH & Co. KGaA, pp. 2058-2060, 96, (7), ISSN 00027820,
[Online-Edition: http://dx.doi.org/10.1111/jace.12440],
[Article]

Abstract

Silicon oxycarbide/hafnia (SiOC/HfO2) ceramic nanocomposites were studied by transmission electron microscopy (TEM) upon isothermal annealing at 1300°C for 1–200 h. TEM investigations in conjunction with energy-dispersive X-ray spectroscopy (EDS) analysis revealed a pronounced reduction in the local carbon content in close proximity to internal surfaces. Such small microcracks are a consequence of the polymer-to-ceramic transition and, hence, are commonly formed upon thermal annealing. The profiles of the carbon content between surface and bulk were analyzed employing error functions to yield carbon diffusivities.

Item Type: Article
Erschienen: 2013
Creators: Nonnenmacher, Katharina and Kleebe, Hans-Joachim and Rohrer, Jochen and Ionescu, Emanuel and Riedel, Ralf and Soraru, G.
Title: Carbon Mobility in SiOC/HfO2Ceramic Nanocomposites
Language: English
Abstract:

Silicon oxycarbide/hafnia (SiOC/HfO2) ceramic nanocomposites were studied by transmission electron microscopy (TEM) upon isothermal annealing at 1300°C for 1–200 h. TEM investigations in conjunction with energy-dispersive X-ray spectroscopy (EDS) analysis revealed a pronounced reduction in the local carbon content in close proximity to internal surfaces. Such small microcracks are a consequence of the polymer-to-ceramic transition and, hence, are commonly formed upon thermal annealing. The profiles of the carbon content between surface and bulk were analyzed employing error functions to yield carbon diffusivities.

Journal or Publication Title: Journal of the American Ceramic Society
Volume: 96
Number: 7
Publisher: Wiley-VCH Verlag GmbH & Co. KGaA
Divisions: 11 Department of Materials and Earth Sciences > Earth Science > Geo-Material-Science
11 Department of Materials and Earth Sciences > Material Science > Dispersive Solids
11 Department of Materials and Earth Sciences > Earth Science
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 19 Feb 2014 13:18
Official URL: http://dx.doi.org/10.1111/jace.12440
Identification Number: doi:10.1111/jace.12440
Funders: Funded by Deutsche Forschungsgemeinschaft. Grant Number: 1181., Funded by Ministry of Higher Education, Research and Arts in Hesse, Germany.
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