High-temperature treatment of carbon-carbon composite materials. Communication 1. Thermal stabilization of two-dimensionally reinforced carbon-carbon composite material object properties

Kolesnikov, S. A.; Mostovoi, G. E.

doi:10.1007/s11148-012-9477-3

Cited by 2 publications

(2 citation statements)

References 3 publications

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“…The d 002 is obviously larger than that of ideal graphite (0.3354 nm), indicating the porous carbon matrix is nongraphitizable. This is still higher than that of the conventional C/C composites in which d 002 is 0.3490 nm when heat treated at 1700 °C . Furthermore, Raman spectroscopy analyses were carried out to investigate the degree of graphitization of fibers and matrix of the C/C composites.…”

Section: Resultsmentioning

confidence: 54%

“…This is still higher than that of the conventional C/C composites in which d 002 is 0.3490 nm when heat treated at 1700 °C. 59 Furthermore, Raman spectroscopy analyses were carried out to investigate the degree of graphitization of fibers and matrix of the C/C composites. As shown in Figure 9d, both the fiber and matrix have two characteristic peaks at about 1350 and 1590 cm −1 , respectively, known as the D (defect) and G (graphite) bands.…”

Section: Resultsmentioning

confidence: 99%

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Fabrication of Large Aerogel-Like Carbon/Carbon Composites with Excellent Load-Bearing Capacity and Thermal-Insulating Performance at 1800 °C

Guo

et al. 2022

ACS Nano

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Carbon aerogels (CAs) are attractive candidates for the thermal protection of aerospace vehicles due to their excellent thermostability and thermal insulation. However, the brittleness and low mechanical strength severely limits their practical applications, and no significant breakthroughs in large CAs with a high strength have been made. We report a high-pressure-assisted polymerization method combined with ambient pressure drying to fabricate large, strong, crack-free carbon/carbon (C/C) composites with an excellent load-bearing capacity, thermal stability, and thermal insulation. The composites are comprised of an aerogel-like carbon matrix and a low carbon crystallinity fiber reinforcement, featuring overlapping nanoparticles, macro-mesopores, large particle contact necks, and strong fiber/matrix interfacial bonding. The resulting C/C composites with a medium density of 0.6 g cm–3 have a very high compressive strength (80 MPa), in-plane shear strength (20 MPa), and specific strength (133 MPa g–1 cm3). Moreover, the C/C composites of 7.5–12.0 mm in thickness exposed to an oxyacetylene flame at 1800 °C for 900 s display very low back-side temperatures of 778–685 °C and even better mechanical properties after the heating. This performance makes the composites ideal for the ultrahigh temperature thermal protection of aerospace vehicles where both excellent thermal-insulating and load-bearing capacities are required.

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Section: Resultsmentioning

confidence: 54%

Section: Resultsmentioning

confidence: 99%