Silicon carbide nano-fibers in-situ grown on carbon fibers for enhanced microwave absorption properties

Zhou, Wei; Long, Lan; Xiao, Peng; Li, Yang; Luo, Hang; Hu, Weida; Yin, Rui

doi:10.1016/j.ceramint.2017.01.095

Cited by 121 publications

(22 citation statements)

References 32 publications

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“…SiC nanofibers were grown in situ on the surface of carbon fibers (T700, 12K, diameter: 7 μm, Toray Inc, Japan) via electroplating Ni and subjected to catalysis chemical vapor deposition (CCVD) at 1000°C for 4 hours. The details can be found in Ref 26. The only difference is that the chopped 2‐3 mm carbon fibers were used as the starting material in this study instead of the 10 cm fibers.…”

Section: Methodsmentioning

confidence: 99%

High‐temperature electromagnetic wave absorption properties of C_f/SiCNFs/Si₃N₄ composites

Zhou

Long

et al. 2020

J Am Ceram Soc

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Carbon fibers reinforced Si 3 N 4 composites with SiC nanofiber interphase (C f / SiCNFs/Si 3 N 4) were prepared by combining catalysis chemical vapor deposition and gel-casting process. Microstructures, mechanical properties, and electromagnetic wave absorption properties within X-band at 25°C-800°C of C f /SiCNFs/Si 3 N 4 composites were investigated. Results show that SiC nanofibers are combined well with Si 3 N 4 matrix and carbon fibers, the fracture toughness is thus increased more than double from 3.51 MPa•m 1/2 of the Si 3 N 4 ceramic to 7.23 MPa•m 1/2 of the asprepared composites. As the temperature increases from 25°C to 800°C, C f /SiCNFs/ Si 3 N 4 composites show a temperature-dependent complex permittivity, attenuation constant, and impedance. The relatively high attenuation capability of C f /SiCNFs/ Si 3 N 4 composites at elevated temperature results in a great minimum reflection loss of −20.3 dB at 800°C with a thin thickness of 2.0 mm. The superior electromagnetic wave absorption performance mainly originates from conductive loss, multi-reflection, and strong polarization formed by the combined effects of carbon fibers and SiC nanofibers. K E Y W O R D S C f /SiCNFs absorbers, high-temperature electromagnetic wave absorption, mechanical properties, Si 3 N 4 ceramics How to cite this article: Zhou W, Li Y, Long L, Luo H, Wang Y. High-temperature electromagnetic wave absorption properties of C f /SiCNFs/Si 3 N 4 composites. J

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Section: Methodsmentioning

confidence: 99%

High‐temperature electromagnetic wave absorption properties of C_f/SiCNFs/Si₃N₄ composites

Zhou

Long

et al. 2020

J Am Ceram Soc

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“…Prakash et al [34] improved the oxidation resistance of carbon fibers by achieving 16% char after coating CFs with SiC nanowires as compared with 0% char for uncoated carbon fibers. Zhou et al [35] improved the carbon fibers oxidation resistance by growing silicon carbide on carbon fibers using catalysis chemical vapor deposition (CCVD), which increased the char yield to around 40%. In our observation, we have maximum 60% char for hybrid carbon-SiC nano-fibers.…”

Section: Thermogravimetric Analysis (Tga)mentioning

confidence: 99%

Hybrid Carbon Nano-Fibers with Improved Oxidation Resistance

Al-Ajrash

Lafdi

2019

Ceramics

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Hybrid Carbon-Silicon Carbide (C-SiC) nano-fibers were fabricated while using a mixture of polyacrylonitrile (PAN) and silicon (Si) nanoparticles as precursors. The microstructure of the material was examined using X-ray diffraction and Raman spectroscopy as a function of processing temperature and holding time. A complete transformation of Si to SiC occurred at 1250 • C. However, for heat treatments below 1000 • C, three distinct phases, including Si, C, and SiC were present. The effect of microstructural changes, due to the heat treatment, on oxidation resistance was determined using thermogravimetric analysis (TGA). Furthermore, the char yield showed exponential growth with increasing the carbonization temperature from 850 • C to 1250 • C. The holding times at higher temperatures showed a significant increase in thermal properties because of SiC grain growth. At longer holding times, the SiC phase has the function of bothcoating and reinforcing phase. Such structural changes were related to fibers mechanical properties. The tensile strength was the highest for fiber carbonized fibers at 850 • C, while the modulus increased monotonically with increasing carbonization temperature.

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“…Many studies 11,12,17 have shown that the resistivity of CF is only (0.8-1.8) Â 10 À3 U cm because of its high graphitization degree and special graphite microcrystalline stacking structure. In accordance with the skin effect, 18,19 the complex permittivity of CFs is usually regulated using carbonaceous material coatings, where their conductivity can be controlled, 20,21 leading to reduction in complex permittivity and enhancement of wave impedance. In Zhou's study, 20 silicon carbide nanobers were in situ grown on the surface of CF by catalytic chemical vapor deposition.…”

Section: Introductionmentioning

confidence: 99%

In situ formation of Fe₃O₄/N-doped carbon coating on the surface of carbon fiber with improved electromagnetic wave-absorption property

Sun

et al. 2020

RSC Adv.

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Silicon carbide nano-fibers in-situ grown on carbon fibers for enhanced microwave absorption properties

Cited by 121 publications

References 32 publications

High‐temperature electromagnetic wave absorption properties of C_f/SiCNFs/Si₃N₄ composites

High‐temperature electromagnetic wave absorption properties of C_f/SiCNFs/Si₃N₄ composites

Hybrid Carbon Nano-Fibers with Improved Oxidation Resistance

In situ formation of Fe₃O₄/N-doped carbon coating on the surface of carbon fiber with improved electromagnetic wave-absorption property

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Silicon carbide nano-fibers in-situ grown on carbon fibers for enhanced microwave absorption properties

Cited by 121 publications

References 32 publications

High‐temperature electromagnetic wave absorption properties of Cf/SiCNFs/Si3N4 composites

High‐temperature electromagnetic wave absorption properties of Cf/SiCNFs/Si3N4 composites

Hybrid Carbon Nano-Fibers with Improved Oxidation Resistance

In situ formation of Fe3O4/N-doped carbon coating on the surface of carbon fiber with improved electromagnetic wave-absorption property

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High‐temperature electromagnetic wave absorption properties of C_f/SiCNFs/Si₃N₄ composites

High‐temperature electromagnetic wave absorption properties of C_f/SiCNFs/Si₃N₄ composites

In situ formation of Fe₃O₄/N-doped carbon coating on the surface of carbon fiber with improved electromagnetic wave-absorption property