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

Autor:	Jian Li, Penglei Guo, Chenglong Hu, Shengyang Pang, Jian Ma, Rida Zhao, Sufang Tang, Hui-Ming Cheng
Rok vydání:	2022
Předmět:	General Engineering General Physics and Astronomy General Materials Science
Zdroj:	ACS Nano. 16:6565-6577
ISSN:	1936-086X 1936-0851
DOI:	10.1021/acsnano.2c00943
Popis:	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
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::86e2260d0fd03985d3973b3f0ee2b602 https://doi.org/10.1021/acsnano.2c00943 Zobrazit plný text záznamu