Fabrication of cross-ply Cf/C-SiC composites and the investigation of pyrolysis conditions on their properties
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The fabrication of continuous carbon fiber-reinforced carbon-silicon carbide matrix (Cf/C-SiC) cross-ply composites is highlyattractive from a practical viewpoint due to their homogeneous microstructures and isotropic mechanical properties. However,the properties of Cf/C-SiC composites depend significantly on their processing conditions and temperatures, especially thepyrolysis conditions and temperatures. In this study, cross-ply Cf/C-SiC composites were fabricated using different pyrolysisprotocols with phenolic resin via a liquid silicon infiltration. The effects of the pyrolysis conditions on the microstructures ofthe composites and their mechanical properties as well as on crack formations were evaluated at room temperature. Pyrolysiswas performed at 600 °C for 1 h in a nitrogen atmosphere at different heating rates. The flexural strength varied from aminimum of 47 ± 3 MPa to a maximum of 62 ± 6 MPa (~ 35% increase) depending on the pyrolysis conditions.
Abstract
The fabrication of continuous carbon fiber-reinforced carbon-silicon carbide matrix (Cf/C-SiC) cross-ply composites is highlyattractive from a practical viewpoint due to their homogeneous microstructures and isotropic mechanical properties. However,the properties of Cf/C-SiC composites depend significantly on their processing conditions and temperatures, especially thepyrolysis conditions and temperatures. In this study, cross-ply Cf/C-SiC composites were fabricated using different pyrolysisprotocols with phenolic resin via a liquid silicon infiltration. The effects of the pyrolysis conditions on the microstructures ofthe composites and their mechanical properties as well as on crack formations were evaluated at room temperature. Pyrolysiswas performed at 600 °C for 1 h in a nitrogen atmosphere at different heating rates. The flexural strength varied from aminimum of 47 ± 3 MPa to a maximum of 62 ± 6 MPa (~ 35% increase) depending on the pyrolysis conditions.
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