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- Title
Epitaxial Grown Carbon Nanotubes Reinforced Pyrocarbon Matrix in C/C Composites with Improved Mechanical Properties.
- Authors
Liu, Ningkun; Guo, Lingjun; Kou, Gang; Li, Yunyu; Yin, Xuemin
- Abstract
In order to achieve the highly efficient preparation of high-performance carbon/carbon (C/C) composites, epitaxial grown carbon nanotubes (CNTs) and a pyrocarbon matrix were simultaneously synthesized to fabricate CNT-reinforced C/C composites (CC/C composites). With precise control of the temperature gradient, CNTs and the pyrocarbon matrix could grow synchronously within a 2D needle-punched carbon fiber preform. Surprisingly, the CNTs remained intact within the pyrocarbon matrix at the nano-level, and the CNT-reinforced nano-pyrocarbon matrix was compact, with virtually no gaps and pores, which were tightly connected with the carbon fibers without cracks. Based on the results of Raman analysis, there is less residual stress in the CNT-reinforced pyrocarbon matrix and carbon fibers, and less of a mismatch between the coefficient and thermal expansion. Additionally, CC/C composites fabricated by this method could achieve a low density, open porosity with a large size, and improved mechanical properties. More importantly, our work provides a rational design strategy for the highly efficient preparation and structural design of high-performance CNT-einforced C/C composites.
- Subjects
TEMPERATURE control; CARBON fibers; THERMAL expansion; RESIDUAL stresses; STRUCTURAL design; CARBON nanotubes; HIGH performance work systems
- Publication
Materials (1996-1944), 2021, Vol 14, Issue 21, p6607
- ISSN
1996-1944
- Publication type
Article
- DOI
10.3390/ma14216607