Design, fabrication and sound absorption performance investigation of porous copper fiber sintered sheets with rough surface

Liu, Ruiliang; Hou, Liang; Zhou, Wei; Chen, Yun

doi:10.1016/j.apacoust.2020.107525

Cited by 15 publications

(8 citation statements)

References 35 publications

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“…The complex interface on the surface of Fe/C−500 and the internal cavity increase the contact between air molecules and the material, and the rough surface of the material further increases the viscous damping of sound waves in the transmission medium, so that energy can be dissipated more effectively through friction. 44 In addition, the surface layers of the Fe/C− 500 hierarchical structure can form a similar open hole structure with a diameter of tens to hundreds of nanometers, which forms a gradient pore structure with a few microns of Fe/C−500 internal cavity, which is helpful to improve the sound absorption performance. 45 The lamellae with different orientations are stacked on each other but still leave gaps, which can guide the sound wave from the hierarchical structure to the hollow structure and further consume the sound wave energy in the hollow structure.…”

Section: Resultsmentioning

confidence: 99%

“…The consumption of sound energy results from the friction loss of air molecules after contacting with sound waves, which relies on the fluctuation velocity of air molecules created by sound pressure. The complex interface on the surface of Fe/C–500 and the internal cavity increase the contact between air molecules and the material, and the rough surface of the material further increases the viscous damping of sound waves in the transmission medium, so that energy can be dissipated more effectively through friction . In addition, the surface layers of the Fe/C–500 hierarchical structure can form a similar open hole structure with a diameter of tens to hundreds of nanometers, which forms a gradient pore structure with a few microns of Fe/C–500 internal cavity, which is helpful to improve the sound absorption performance .…”

Section: Resultsmentioning

confidence: 99%

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Combinatorial Structural Engineering of Multichannel Hierarchical Hollow Microspheres Assembled from Centripetal Fe/C Nanosheets to Achieve Effective Integration of Sound Absorption and Microwave Absorption

Su-su

Zhang

et al. 2023

ACS Appl. Mater. Interfaces

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Electromagnetic radiation and noise pollution are two of the four major environmental pollution sources. Although various materials with excellent microwave absorption performances or sound absorption properties have been manufactured, it is still a great challenge to design materials with both microwave absorption and sound absorption abilities due to different energy consumption mechanisms. Herein, a combination strategy based on structural engineering was proposed to develop bi-functional hierarchical Fe/C hollow microspheres composed of centripetal Fe/C nanosheets. Both of the interconnected channels created by multiple gaps among the adjacent Fe/C nanosheets and the hollow structure have positive effects on the absorbing performances by promoting the penetration of microwaves and acoustic waves and prolonging action time between microwave energy and acoustic energy with materials. In addition, a polymer-protection strategy and a high-temperature reduction process were applied to keep this unique morphology and further improve the performances of the composite. As a result, the optimized hierarchical Fe/C–500 hollow composite exhibits a wide effective absorption bandwidth of 7.52 GHz (10.48–18.00 GHz) at only 1.75 mm. Furthermore, the Fe/C–500 composite can effectively absorb sound wave in the frequency of 1209–3307 Hz, basically including part of the low frequency range (<2000 Hz) and most of the medium frequency range (2000–3500 Hz), and has 90% absorption of sound at 1721–1962 Hz. This work puts new insight into the engineering and development of microwave absorption–sound absorption-integrated functional materials with promising applications.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Combinatorial Structural Engineering of Multichannel Hierarchical Hollow Microspheres Assembled from Centripetal Fe/C Nanosheets to Achieve Effective Integration of Sound Absorption and Microwave Absorption

Su-su

Zhang

et al. 2023

ACS Appl. Mater. Interfaces

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“…Copper fiber, stainless steel fiber, etc [26][27][28] Fiber composite materials Good overall performance.…”

Section: Organic Fiber Materialsmentioning

confidence: 99%

“…Improved sound absorption performance was a result of sound waves being reflected repeatedly in the porous medium between gradient interfaces. Liu et al [26] used copper fibers to produce porous copper fiber sintered plates (PCFSSs) through solid-phase sintering, investigating the influence of gradient pore structures on their sound absorption performance. The results showed that the three-layer PCFSSs with gradient pore structures could cause repeated propagation and dissipation of sound waves due to reflection between gradient interfaces, satisfying the noise control requirements at different frequency ranges.…”

Section: Metal Fiber Materialsmentioning

confidence: 99%

Research progress of noise reduction of composite structures of porous materials and acoustic metamaterials

Huang,

Yang,

Talukder

et al. 2024

Phys. Scr.

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Noise pollution is an important problem affecting people's lives and work quality. In the current noise reduction materials, the porous sound absorption materials usually only haveagood sound absorption effect for medium and high -frequency sound waves, and the sound absorption effect for low -frequency sound waves is relatively weak. However, in recent years, the research on acoustic metamaterials has made a breakthrough which can effectively absorb or isolate low-frequency sound waves. Therefore, researchers propose to combine porous sound-absorbing materials with acoustic metamaterials to form a composite structure, that broadens the frequency range of noise reduction, so as to achieve the goal of full-frequency domain noise reduction. This paper first introduces the research progress of porous materials and acoustic metamaterials, and then introduces the research progress of composite structures that are made of porous materials and acoustic metamaterials. Finally, the application prospect of the composite field of porous sound-absorbing materials and acoustic metamaterials are summarized.

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“…In figures 5(e), (f), cracks and pores are observed because of the incompatibility of copper and carbon. This incompatibility can be explained by the fact that there is a wall gap on the contact surface of copper fiber and carbon [30]. Therefore, the crack propagation is prone to occur at the contact surface, resulting in the performance degradation.…”

Section: Mechanical and Electrical Propertiesmentioning

confidence: 99%

Copper fiber reinforced needle-coke/carbon composite for pantograph slide and its current-carrying wear performance

Ren

et al. 2022

Mater. Res. Express

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Copper fiber reinforced needle-coke/carbon (CF-NC/C) composites with different copper fiber contents have been successfully developed for urban rail pantograph slide block. The mechanical properties of needle coke samples containing 0 wt%, 4 wt%, 8 wt%, 12 wt% and 16 wt% were examined separately. It is found that the presence of needle coke with high aspect ratio, strength and electrical conductivity can greatly improves the physical properties of the pure carbon matrix. Therefore, we have obtained a novel carbon matrix composite. It is also revealed that the optimized CF-NC/C with 5 wt% copper fibers (CF-NC/C-5) composite has outstanding mechanical properties, current-carrying friction wear properties. The density, resistivity, and impact strength of the CF-NC/C-5 composite are 1.8788 g/cm³, 35.18 μΩ·m, 0.16 J/cm², respectively. In current-carrying friction wear tests (0 A, 5 A, 10 A and 15 A), the CF-NC/C-5 shows an optimum friction wear performance. To avoid agglomeration of copper fibers, the copper fibers are added innovatively during the rolling process and uniformly distributed in the carbon matrix under the tangential force of rolling, which exhibits an improved effect on reinforcing the NC/C composites. Our results greatly advance the development of the needle-coke/carbon composite, which makes the new CF-NC/C composite an ideal candidate for sliding plate material with excellent properties.

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Design, fabrication and sound absorption performance investigation of porous copper fiber sintered sheets with rough surface

Cited by 15 publications

References 35 publications

Combinatorial Structural Engineering of Multichannel Hierarchical Hollow Microspheres Assembled from Centripetal Fe/C Nanosheets to Achieve Effective Integration of Sound Absorption and Microwave Absorption

Combinatorial Structural Engineering of Multichannel Hierarchical Hollow Microspheres Assembled from Centripetal Fe/C Nanosheets to Achieve Effective Integration of Sound Absorption and Microwave Absorption

Research progress of noise reduction of composite structures of porous materials and acoustic metamaterials

Copper fiber reinforced needle-coke/carbon composite for pantograph slide and its current-carrying wear performance

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