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Ablation Performance of Carbon Fiber Reinforced Ceramic Matrix Composites


Title: Ablation Performance of Carbon Fiber Reinforced Ceramic Matrix Composites

Authors: Haonan Song, Christopher Varela, Richard Chapman, Jihua Gou

DOI: 10.33599/nasampe/c.23.0031

Abstract: There are significant challenges for materials in extreme environments for a variety of applications such as aircraft engines, gas turbines, nuclear reactors, re-entry vehicles, and hypersonic structures. Ceramic matrix composites (CMCs) could be ideal candidates to meet these stringent requirements for materials due to their high melting temperatures, high oxidation, corrosion and ablation resistance, low creep, and thermal cycling behavior in such extreme environments. Particularly, continuous fibers can bridge cracks in CMCs and therefore improve the strength and fracture toughness of composites. In this study, continuous ceramic fiber reinforced silicon oxycarbide composite was manufactured with the polysiloxane resin and woven ceramic fabrics through the polymer infiltration and pyrolysis process (PIP). Re-infiltration of the polysiloxane resin into the composites, curing in an autoclave, and pyrolysis for additional cycles improved densification of the composites by increasing the yield of ceramics and reducing the porosity of the composites. A dense structure of the composites was observed by SEM. The crystalline structure of the composites was examined through XRD to indicate the degree of polymer pyrolysis to ceramics. The results of four-point bending testing of the composites showed a flexural strength of 62 MPa, a flexural modulus of 51 GPa, and a fracture toughness of 1.3×108 J/m3. The oxyacetylene torch test was performed to determine the ablation properties of the composites under different heat flux levels.

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Conference: CAMX 2023

Publication Date: 2023/10/30

SKU: TP23-0000000031

Pages: 15

Price: $30.00

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