Carbon–Carbon (C/C) composites are among the most advanced structural materials used in aerospace, defense, and high-performance engineering due to their exceptional thermal stability, strength-to-weight ratio, and resistance to extreme environments. In sheet form, these composites combine the high strength of carbon fibers with the thermal resilience of a carbon matrix, producing materials capable of withstanding temperatures exceeding 2000 °C without loss of structural integrity.
Material Overview
Carbon–Carbon composites are composed of layers of woven or unidirectional carbon fibers embedded within a carbon matrix, forming a lightweight yet mechanically robust structure. Their density typically ranges between 1.6 and 2.0 g/cm3, with tensile strengths exceeding 200 MPa and flexural strengths up to 400 MPa, depending on fiber orientation and fabrication technique. The composite’s thermal conductivity can reach 400 W·m−1·K−1 in the fiber direction, rivaling that of some metals while maintaining minimal thermal expansion. According to Agarwal et al. (2024), multi-directional architectures such as 3D and 4D carbon weaves enhance isotropy, improving both fracture toughness and fatigue resistance under thermal cycling. However, as Sunil Kumar et al. (2021) reported, oxidation above 400 °C remains a major limitation, leading to strength degradation of up to 45% at 700 °C. Protective coatings such as SiC or refractory oxides are therefore essential for long-term stability in oxidizing environments.
Applications and Advantages
Due to their outstanding performance under extreme heat, C/C composite sheets are extensively employed in aerospace components such as re-entry vehicle heat shields, rocket nozzles, aircraft brake discs, and high-temperature furnace fixtures. Their lightweight nature and low coefficient of thermal expansion (CTE) make them ideal for applications requiring dimensional precision under thermal stress. Windhorst and Blount (1997) noted that these composites withstand repeated thermal cycling above 2000 °C without deformation, significantly outperforming metallic and ceramic alternatives. Furthermore, Kim and Kim (2022) demonstrated that altering the yarn architecture in multi-directional composites allows optimization of stiffness, thermal conductivity, and fatigue life for specific aerospace and defense applications. Emerging innovations include self-healing carbon–carbon systems capable of repairing microcracks autonomously, extending operational lifespans and reducing maintenance costs.
Goodfellow Availability
Goodfellow provides high-quality Carbon–Carbon Composite sheets suitable for aerospace, automotive, and industrial high-temperature applications. Custom fiber orientations, matrix densities, and coating options are available to meet specific research and engineering requirements.
Explore Carbon–Carbon Composite – Sheet – Material Information and other advanced materials in Goodfellow’s online catalogue: Goodfellow product finder.
References
- Agarwal, N., Rangamani, A., Bhavsar, K., Virnodkar, S. S., Araújo Fernandes, A., Chadha, U., Srivastava, D., Patterson, A. E., & Rajasekharan, V. (2024). An overview of carbon–carbon composite materials and their applications. Frontiers in Materials, 11, 1374034. https://doi.org/10.3389/fmats.2024.1374034
- Sunil Kumar, B. V., Londe, N. V., Lokesha, M., Vasantha Kumar, S. N., & Surendranathan, A. O. (2021). Influence of oxidation on fracture toughness of carbon–carbon composites for high-temperature applications. IGF-ESIS, 58, 08. https://doi.org/10.3221/IGF-ESIS.58.08
- Kim, M. W., & Kim, Y. (2022). A thermo-mechanical properties evaluation of multi-directional carbon–carbon composite materials in aerospace applications. Aerospace, 9(8), 461. https://doi.org/10.3390/aerospace9080461
- Windhorst, T., & Blount, G. (1997). Carbon–carbon composites: A summary of recent developments and applications. Materials & Design, 18(1), 11–15. https://doi.org/10.1016/S0261-3069(97)00024-1