Effect of SiC nanowires on the high-temperature microwave absorption properties of SiCf/SiC composites

Han, Tao; Luo, Ruiying; Cui, Guangyuan; Wang, Lianyi

doi:10.1016/j.jeurceramsoc.2019.01.018

Cited by 142 publications

(35 citation statements)

References 57 publications

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“…These results indicate the existence of dielectric losses in the composites studied for the high frequencies. This behavior is due to the relaxation losses of the polarization by the hysteresis between the displacement current and the accumulation potential when the frequency increases [23]. The results obtained in this work are in good agreement with the literature [24].…”

Section: Proposed Microwave Techniquesupporting

confidence: 91%

Dielectric properties of ceramic composite materials based on alumina reinforced by titanium carbide

Ouhassan¹,

Bri²,

El³

et al. 2020

FME Transactions

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The aim of this research work is to study the dielectric and microwave properties of the three ceramic composites Al2O3-TiC, Al2O3-0.3TiC and Al2O3-0.7TiC. The results obtained show that the effective permittivity increases with the increase in the filling rate of titanium carbide TiC inclusions and their contrasts. As for the classical mixing laws, they make it possible to estimate permittivity for low volume fractions and low contrasts. The values of the real part of the complex permittivity decrease with frequency increase in the two bands X and Ku, while the imaginary part is approximately constant in the X band and takes negative values in the Ku band.

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Section: Proposed Microwave Techniquesupporting

confidence: 91%

Dielectric properties of ceramic composite materials based on alumina reinforced by titanium carbide

Ouhassan¹,

Bri²,

El³

et al. 2020

FME Transactions

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show abstract

“…Generally, EM wave attenuation ability can be evaluated by loss tangent (tan δ = ε ″/ ε ′), and higher tan δ indicates stronger loss and better dissipation of EM energy 20 . Figure 3C shows the tan δ of C f /Mu composites with different fiber contents.…”

Section: Resultsmentioning

confidence: 99%

Dielectric response and electromagnetic wave absorption of novel macroporous short carbon fibers/mullite composites

Long

Luo

et al. 2020

J Am Ceram Soc

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Nowadays, electromagnetic (EM) interference and radiation pollution generated from widespread application of electronic devices, could damage the normal function of electronic equipment as well as humanity. 1-4 Consequently, high-performance EM wave absorbing materials which have drawn increasing attention are now regarded as an effective strategy to eliminate the EM pollution. Carbon-based composites, 5-9 metal-based composites, 10-14 polymer-based composites, 15-19 and ceramic-based composites, 20-24 have been extensively studied for EM wave absorption application. However, applications of carbon, metal, and polymer-based composites are limited at elevated temperatures due to their degraded strength and EM wave absorption under oxidizing and/or corrosive atmosphere. 25 Therefore, ceramic-based composites with lightweight, excellent high-temperature strength, and outstanding thermal-chemical stability, are regarded as the most promising candidates of EM wave absorbing materials for high-temperature applications.

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“…High-temperature electromagnetic wave absorption materials (HTEWAMs) have attracted growing attention due to their wide applications in both civil and military fields such as communication devices, aerospace vehicles, etc. [1][2][3][4][5][6][7] Carbon fibers are of great potential in high-temperature electromagnetic wave absorbers due to their lightweight and excellent high-temperature mechanical and electrical properties. [8][9][10] A number of works have been carried out to study the electromagnetic wave absorption properties and related mechanisms of carbon fibers and their composites.…”

Section: Introductionmentioning

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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Effect of SiC nanowires on the high-temperature microwave absorption properties of SiCf/SiC composites

Cited by 142 publications

References 57 publications

Dielectric properties of ceramic composite materials based on alumina reinforced by titanium carbide

Dielectric properties of ceramic composite materials based on alumina reinforced by titanium carbide

Dielectric response and electromagnetic wave absorption of novel macroporous short carbon fibers/mullite composites

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

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Effect of SiC nanowires on the high-temperature microwave absorption properties of SiCf/SiC composites

Cited by 142 publications

References 57 publications

Dielectric properties of ceramic composite materials based on alumina reinforced by titanium carbide

Dielectric properties of ceramic composite materials based on alumina reinforced by titanium carbide

Dielectric response and electromagnetic wave absorption of novel macroporous short carbon fibers/mullite composites

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

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