Refractory structures made of low-weight carbon-bonded carbon-fiber-reinforced composites

Abstract

Published data on the use of high-porosity low-weight carbon-bonded carbon-fiber-reinforced (CBCR) composite structural materials in high-temperature technology are generalized. It is shown that large-scale structures can be created from CBCR composites at a quite small material weight consumption. Such structures are characterized by low weight and small temperature-induced deformations, which ensure long service life and reliable thermal isolation, for example, of metal furnace shells. Methods for the assembly of CBCR structures by mechanical means or using heat-resistant glues are proposed.

SiOC modified carbon‐bonded carbon fiber composite with SiC nanowires enhanced interfibrous junctions

“…No catalyst was found at the tip of SiC nanowires, suggesting a vapor-solid growth mechanism of the nanowire. 32,33 The density of SiCNWs-CBCF is 0.26 g/ cm 3 which is about 0.03 g/cm 3 higher than that of CBCF. This result indicates that the SiC nanowires composed ~11 wt% (Figure 4).…”

“…The cubic CBCF substrates with an edge length of 10 mm were cut from bulk CBCF composite with a density of 0.23 g/ cm 3 and a porosity of ~80%. All of the specimens were ultrasonically cleaned with ethanol and dried at 100°C for 4 hours.…”

“…Carbon-bonded carbon fiber (CBCF) composites usually exhibit a highly porous and layered architecture that is assembled by a large amount of chopped carbon fibers with vitreous carbon as binding materials. [1][2][3][4][5] Because of the low density (0.1-0.5 g/cm 3 ) and low thermal conductivity, CBCF composites are thought to be a promising candidate for lightweight thermal insulator for applications in aerospace areas. [6][7][8][9] However, due to the brittleness of vitreous carbon junctions, CBCF composites usually show low compression strength.…”

Fabrication of low-density carbon-bonded carbon fiber composites with an Hf-based coating for high temperature applications

“…CBCFs are typical porous carbon-carbon (C/C) composites with low densities of 0.1-0.5 g cm À3 and high open porosities over 70%. [11][12][13] They are thought to be desirable candidates for high-temperature heat insulation applications 14,15 and thermal insulation applications in aerospace 13,16,17 due to their unique properties such as lightweightedness, low thermal conductivity, and high temperature stability However, low mechanical properties and poor oxidation resistance limit the wide applications of monolithic CBCFs. Recently, many research studies have been carried out to solve these problems.…”