The Evaluation of Thermoplastic Precursors for C/C-SiC Manufactured by Liquid Silicon Infiltration (LSI)

Abstract:

C/C-SiC composites, fabricated by the Liquid Silicon Infiltration process (LSI), typically use phenolic resin-based thermosets as carbon precursors. In contrast to this, two different thermoplastics (Polyetheretherketone PEEK and Polyetherimide PEI) were examined for their suitability as carbon precursors for C/C-SiC composites. The carbon fiber surfaces were pretreated between 400 °C and 800 °C in nitrogen atmosphere to modify the fiber/matrix bonding. The microstructures of the materials show an increasing SiC content with increasing fiber pretreatment temperature. The flexural strength of the resulting material was determined by 4-point-bending tests.

• Periodical: Materials Science Forum (Volumes 825-826)
• Pages: 232-239
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.825-826.232
• Online since: July 2015
• Authors: Florian Reichert*, Nico Langhof, Walter Krenkel
• Keywords: Ceramic Matrix Composites, Liquid Silicon Infiltration Process, Pyrolysis, Thermoplastics

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