Mechanical and electromagnetic shielding performance of carbon fiber reinforced multilayered (PyC-SiC)n matrix composites

Yan, Jia; Li, Kezhi; Lin, Xue; Ren, Junjie; Zhang, Shouyang; Li, Hejun

doi:10.1016/j.carbon.2016.10.004

Cited by 106 publications

(38 citation statements)

References 43 publications

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“…To achieve favorable absorption performance, dielectric loss of mullite based composites is therefore needed to be improved by introducing highly conductive dielectric materials. Among large numbers of dielectric materials, carbon fibers which possess advantages of low density, superior conductive loss, and high thermal stability and mechanical property have been widely used as excellent functional agent to manufacture lightweight and thin materials with strong EM wave absorption 33‐37 as well as EM shielding 38‐42 . Moreover, carbon fibers still exhibit excellent physical properties without degradation at high temperature of 1500 o Cin a nonoxidizing environment 43 .…”

Section: Introductionmentioning

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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Section: Introductionmentioning

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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“…1 In addition, they are also good microwave absorbers when endowing ceramic fibers or ceramic matrix with appropriate dielectric properties, so that the reflection of microwaves can be minimized in the direction of energy radar receiver. [2][3][4] For example, by tailoring the free-carbon content during melt-spin process, typical SiC fibers can display a wide range electrical resistivity from 10 À1 to 10 6 ΩÁcm, 5,6 and SiC matrix composites reinforced by the SiC fibers (SiCf/SiC) with intermediate electrical resistivity (10 1 -10 2 ΩÁcm) can exhibit good microwave-absorbing behavior at X band (8)(9)(10)(11)(12). 7 Alternatively, reinforcing CMCs with shortened and randomly oriented C or SiC fibers can also realize microwave absorbance by triggering resonance effect of different wavelength microwaves.…”

Section: Introductionmentioning

confidence: 99%

Enhanced microwave‐absorbing property of precursor infiltration and pyrolysis derived SiCf/SiC composites at X band: Role of carbon‐rich interphase

Yang

Liu

2018

J Am Ceram Soc

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Ceramic matrix composites (CMCs) can be microwave-absorbent when endowing the composite constituents with proper dielectric properties. In this work, we report a new method to enhance the microwave-absorbing property of CMCs by in situ fabrication of a carbon-rich interphase at the fiber/matrix interface. This was achieved in a SiC fiber reinforced SiC matrix (SiCf/SiC) composite fabricated by precursor infiltration and pyrolysis (PIP). We found that as the PIP temperature increased from 800 to 1000°C, the microwave-absorbing property of the SiCf/SiC composite was significantly enhanced at X band, which also surpassed those of the SiC fiber and monolithic SiC ceramic fabricated at the same temperature. The dominant mechanism was studied by decoupling the effect of individual SiC fibers, SiC matrix, and fiber/matrix interface. The results showed that the SiC fiber and SiC matrix were barely microwave-absorbent, due to their low dielectric losses. The microwave-absorbing mechanism was finally ascribed to the fiber/matrix interface, which was carbon-rich, containing Si and O elements. The interphase showed a conductivity that was superior to that of the fiber and the matrix, and mainly dominated the dielectric property of the overall composite. The results highlight the role of carbon-rich interphase on the microwave-absorbing property of CMCs. K E Y W O R D Sceramic matrix composites, dielectric materials/properties, electromagnetic properties

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“…The well biocompatibility and susceptibility under corrosion atmosphere and favorable mechanical properties equip C/C composites as a novel biomaterial [5,6]. Carbon fiber reinforced multilayered pyrocarbonsilica matrix composites show good flexural strength, fracture toughness, electrical conductivity and electromagnetic interference shielding performance, which are very promising in eliminating electromagnetic interference for the protection of sensitive devices and environments [7,8].…”

Section: Introductionmentioning

confidence: 99%

Chemical vapor infiltration of pyrocarbon from methane pyrolysis: kinetic modeling with texture formation

Zhang

et al. 2018

Sci. China Mater.

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A complete mechanism of methane pyrolysis is proposed for chemical vapor infiltration of pyrocarbon with different textures, which contains a detailed homogeneous mechanism for gas reactions and a lumped heterogeneous mechanism for pyrocarbon deposition. This model is easily applied to simulate gas compositions and pyrocarbon deposition in a vertical hot-wall flow reactor in the temperature range of 1,323-1,398 K without any adjusting parameters and presents better results than previous mechanisms. Results have shown that the consumption of methane and the production of hydrogen are well enhanced due to pyrocarbon deposition. Pyrocarbon deposition prevents the continuously increasing of acetylene composition and leads to the reduction in the mole fraction of benzene at long residence times in the gas phase. The carbon growth with active sites on the surface is the controlling mechanism of pyrocarbon deposition. C 1 species is the precursor of pyrocarbon deposition at 1,323 K, and the primary source over the whole temperature range. As temperature increases, gas phase becomes more mature and depositions from acetylene, benzene and polyaromatic hydrocarbons become more prevalent. A general pyrocarbon formation mechanism is derived with the specific precursors and illustrates that the maturation of gas compositions is beneficial to forming planar structures with hexagonal rings or pentagon-heptagon pairs, namely, high textured pyrocarbon. The results are in well agreement with experiments.

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Mechanical and electromagnetic shielding performance of carbon fiber reinforced multilayered (PyC-SiC)n matrix composites

Cited by 106 publications

References 43 publications

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

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

Enhanced microwave‐absorbing property of precursor infiltration and pyrolysis derived SiCf/SiC composites at X band: Role of carbon‐rich interphase

Chemical vapor infiltration of pyrocarbon from methane pyrolysis: kinetic modeling with texture formation

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