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SiOC modified carbon‐bonded carbon fiber composite with SiC nanowires enhanced interfibrous junctions
Author(s) -
Su Lei,
Li Baoyu,
Wang Hongjie,
Niu Min,
Fan Xingyu
Publication year - 2020
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.17025
Subject(s) - materials science , composite material , ceramic , composite number , fabrication , nanowire , carbon fibers , porosity , compressive strength , reinforced carbon–carbon , nanotechnology , medicine , alternative medicine , pathology
Carbon‐bonded carbon fiber (CBCF) composites are promising lightweight and high efficient thermal insulators to be applied in aerospace area, but their practical applications are usually restricted by the low mechanical performance and poor oxidation resistance. To overcome these drawbacks, many efforts have been made in the fabrication of ceramic coated CBCF composites. However, the densities of these modified composites are usually very high, which would result in the reduction in their thermal insulation performance. Herein, we prepared a CBCF composite with SiC nanowires enhanced interfibrous junctions and SiOC ceramic coated carbon fibers (SiCNWs‐SiOC‐CBCF). Similar to CBCF, the SiCNWs‐SiOC‐CBCF exhibits a low density of 0.35 g/cm 3 and an anisotropic and highly porous architecture. The SiCNWs‐SiOC‐CBCF possesses a compressive strength of 3.8 MPa and a compression modulus of 195.7 MPa in the X (or Y) direction, ~26.7% and 150% higher than those of CBCF respectively. It can also suffer from an isothermal treatment in air at 900°C for 120 minutes. The combination of these properties makes the SiCNWs‐SiOC‐CBCF a good candidate for thermal insulator to be applied in extreme conditions.