Paper Titles
Synthesis of Copper/Silicon-Carbide Composites in a Thermodynamic Disequilibrium
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Thermal Conductivity Behaviour of Al/Diamond and Ag/Diamond Composites in the Temperature Range 4 K < T < 293 K
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The Influence of Stress and Heat on the Transformation Behaviour of NiTi for Actuator Applications in Extruded Aluminium Matrix Composites
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Development and Characterisation of Phenolic Resin Moulding Materials for the Production of New Short Fibre-Reinforced C/C-SiC Composites
p.215
Development and Characterisation of Phenolic Resin Based Liquid Silicon Infiltrated SiC/SiC Composites with SiNx Fibre Coating
p.224
The Evaluation of Thermoplastic Precursors for C/C-SiC Manufactured by Liquid Silicon Infiltration (LSI)
p.232
Investigation of Different Phenolic Resins and their Behavior during Pyrolysis to Form SiC/C-Composites
p.240
Influence of Specimen Geometry and Surface Quality on the Bending Strength of Short Fiber-Reinforced C/SiC
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Development of a SiNx-Based Barrier Coating for SiC Fibres
p.256

Development and Characterisation of Phenolic Resin Based Liquid Silicon Infiltrated SiC/SiC Composites with SiNx Fibre Coating

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Abstract:

SiC/SiC ceramics consist of silicon carbide fibres embedded in a silicon carbide matrix. As an alternative to classic CVI and PIP routes, Liquid Silicon Infiltration (LSI) was chosen as a technique with short process times to obtain composites with low porosity. Silicon carbide composites show good thermal shock resistance, a low coefficient of thermal expansion and excellent physical and chemical stability at elevated temperatures and are therefore regarded as promising candidates for various applications in jet engines and in power engineering. To build up the matrix, different phenolic resin based carbon precursors were infiltrated in fibre preforms and thermally cured, pyrolysed and siliconized. The aim is to obtain a high carbon yield during pyrolysis and to control the pore morphology in a way that the following liquid silicon infiltration leads to a complete reaction of the carbon matrix with silicon to SiC. The siliconization behaviour and conversion into SiC in dependence of pore morphology and chosen precursor is analysed.At the same time a functional fibre coating has to be developed which protects the fibres from liquid silicon and simultaneously provides a weak fibre matrix bonding. A LPCVD-SiNx fibre coating has been chosen and is investigated in fibre composites especially in terms of protection and reactivity in different atmospheres during pyrolysis and siliconization.

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Periodical:

Materials Science Forum (Volumes 825-826)

Pages:

224-231

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.825-826.224

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Online since:

July 2015

Authors:

Bernd Mainzer*, Martin Frieß, Kristina Roder, Daisy Nestler, Daniel Wett, Lydia Wöckel, Thomas Ebert, Guntram Wagner, Stefan Spange, Dietmar Koch

Keywords:

Ceramic Matrix Composites, Fibre Coating, Liquid Silicon Infiltration, Phenolic Resin, SiC/SiC

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© 2015 Trans Tech Publications Ltd. All Rights Reserved

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