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Preparation and hydrothermal corrosion behavior of Cf/SiCN and Cf/SiHfBCN ceramic matrix composites

Yuan, Jia and Luan, Xingang and Riedel, Ralf and Ionescu, Emanuel (2015):
Preparation and hydrothermal corrosion behavior of Cf/SiCN and Cf/SiHfBCN ceramic matrix composites.
In: Journal of the European Ceramic Society, Elsevier Science Publishing, pp. 3329-3337, 35, (12), ISSN 09552219,
[Online-Edition: http://dx.doi.org/10.1016/j.jeurceramsoc.2014.12.009],
[Article]

Abstract

Cf/SiCN and Cf/SiHfBCN-based ceramic matrix composites (CMC) were fabricated using the precursor infiltration and pyrolysis technique (PIP). Their behavior in subcritical hydrothermal conditions was investigated at 150–250 °C using exposition times of 48, 96 and 240 h and shown to rely on active corrosion.

The data of the mass loss as a function of the corrosion time and temperature at S/V of 0.075 were used to rationalize the corrosion kinetics of the CMCs. Both materials have been shown to exhibit excellent stability in subcritical hydrothermal conditions. The corrosion rates of Cf/SiHfBCN were lower than those determined for Cf/SiCN; furthermore, SEM investigation indicates that spallation occurred in the Cf/SiCN samples; whereas the ceramic matrix was still attached on the individual carbon fibers in Cf/SiHfBCN. The results indicate that the incorporation of Hf and B into SiCN matrix leads to a significant improvement of its hydrothermal corrosion performance.

Item Type: Article
Erschienen: 2015
Creators: Yuan, Jia and Luan, Xingang and Riedel, Ralf and Ionescu, Emanuel
Title: Preparation and hydrothermal corrosion behavior of Cf/SiCN and Cf/SiHfBCN ceramic matrix composites
Language: English
Abstract:

Cf/SiCN and Cf/SiHfBCN-based ceramic matrix composites (CMC) were fabricated using the precursor infiltration and pyrolysis technique (PIP). Their behavior in subcritical hydrothermal conditions was investigated at 150–250 °C using exposition times of 48, 96 and 240 h and shown to rely on active corrosion.

The data of the mass loss as a function of the corrosion time and temperature at S/V of 0.075 were used to rationalize the corrosion kinetics of the CMCs. Both materials have been shown to exhibit excellent stability in subcritical hydrothermal conditions. The corrosion rates of Cf/SiHfBCN were lower than those determined for Cf/SiCN; furthermore, SEM investigation indicates that spallation occurred in the Cf/SiCN samples; whereas the ceramic matrix was still attached on the individual carbon fibers in Cf/SiHfBCN. The results indicate that the incorporation of Hf and B into SiCN matrix leads to a significant improvement of its hydrothermal corrosion performance.

Journal or Publication Title: Journal of the European Ceramic Society
Volume: 35
Number: 12
Publisher: Elsevier Science Publishing
Uncontrolled Keywords: Ceramic matrix composites (CMCs), Nanocomposites, Hydrothermal corrosion, Single-source precursors
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: 22 Jun 2015 10:55
Official URL: http://dx.doi.org/10.1016/j.jeurceramsoc.2014.12.009
Additional Information:

8th International Symposium on Nitrides in Conjunction with the 7th International Workshop on Spinel Nitrides and Related Materials and the Annual Meeting of the Marie Curie ITN 7th Framework Programme FUNEA

Identification Number: doi:10.1016/j.jeurceramsoc.2014.12.009
Funders: JY acknowledges financial support from China Scholarship Council (CSC) during his stay at TU Darmstadt., XGL acknowledges the financial support of the National Natural Science Foundation of China (No. 51002121) as well as NPU Foundation for Fundamental Research, No. NPU-FFR-JC20110248., RR and EI acknowledge financial support from the European Research Agency (FP7 FUNEA – Functional Nitrides for Energy Applications) and the Deutsche Forschungsgemeinschaft (DFG).
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