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

Su, Lei; Li, Baoyu; Wang, Hongjie; Niu, Min; Fan, Xingyu

doi:10.1111/jace.17025

Cited by 16 publications

(12 citation statements)

References 35 publications

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“…First, the siloxane xerogel pyrolyzed and released SiO and CO gases . Then SiC nanowire nuclei were formed when SiO gas reacted with activated carbon sites (eq ) on the surface of SCFs. , Finally, the growth of nuclei into SiC nanowires was facilitated by the continuous supply and reaction of SiO and CO gases (eq ). As shown in Figures S2 and S3, the microscale pores constructed by SCFs provide the space for the growth of SiC nanowires.…”

Section: Resultsmentioning

confidence: 99%

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Additive Manufacturing of Resilient SiC Nanowire Aerogels

Guo

Peng

et al. 2022

ACS Nano

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Resilient ceramic aerogels are emerging as a fascinating material that features light weight, low thermal conductivity, and recoverable compressibility, promising widespread prospects in the fields of heat insulation, catalysis, filtration, and aerospace exploration. However, the construction of the resilient ceramic aerogels with rational designed multiscale architectures aiming for tunable physical and mechanical performances remains a major challenge. Here, 3D constructed resilient SiC nanowire aerogels possessing programmed geometries and engineered mechanical properties are created via additive manufacturing. The Young’s modulus of the fabricated SiC nanowire aerogel lattices are tuned systematically from 0.012 MPa to 5.800 MPa spanning over 2 orders of magnitude. More importantly, the customized lightweight and resilient SiC nanowire aerogels show a low thermal conductivity (0.046 W m–1 K–1). The present work provides another approach to the design and rapid fabrication of resilient ceramic aerogels toward flexible thermal management devices, lightweight engineered structures, and other potential applications.

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Section: Resultsmentioning

confidence: 99%

“…32 Then SiC nanowire nuclei were formed when SiO gas reacted with activated carbon sites (eq 1) on the surface of SCFs. 5,33 Finally, the growth of nuclei into SiC nanowires was facilitated by the continuous supply and reaction of SiO and CO gases (eq 2). 34…”

Section: Resultsmentioning

confidence: 99%

Additive Manufacturing of Resilient SiC Nanowire Aerogels

Guo

Peng

et al. 2022

ACS Nano

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“…fabricated in situ growth of 3D SiC nanowires reinforced SiOC/CBCF composite and found the mechanical performance of SiOC/CBCF composites could be dramatically enhanced originating from the pull‐out and bridging behavior of SiCnws. Recently, Su et al 22 . also reported the SiCnws could improve the interfibrous junctions in SiOC/CBCF composites via polymer impregnation pyrolysis (PIP) process.…”

Section: Introductionmentioning

confidence: 99%

“…Du et al 21 fabricated in situ growth of 3D SiC nanowires reinforced SiOC/CBCF composite and found the mechanical performance of SiOC/CBCF composites could be dramatically enhanced originating from the pull-out and bridging behavior of SiCnws. Recently, Su et al 22 also reported the SiCnws could improve the interfibrous junctions in SiOC/CBCF composites via polymer impregnation pyrolysis (PIP) process. However, to best of our knowledge, the in situ growth of SiC nanowires onto carbon fiber's surface to enhance the EMW absorption performance and the mechanical property of the SiOC ceramic matrix carbon fiber composites have been rarely investigated.…”

Section: Introductionmentioning

confidence: 99%

Multiscale SiCnw and carbon fiber reinforced SiOC ceramic with enhanced mechanical and microwave absorption properties

Qian

et al. 2022

J Am Ceram Soc

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The hierarchical SiOC/SiCnws/CF composites (A/B/C structure) were designed via precursor infiltration and pyrolysis process. The SiOC ceramics served as the wave-transparent characteristic materials to adjust the impedance matching.Herein, the in situ growth of SiCnws not only was used for the absorber but served as the reinforcement of SiOC matrix composites. In detail, the SiOC/SiCnws/CF-1200 • C-2 exhibits excellent electromagnetic absorption performance with minimum reflection loss of −46 dB at 14.4 GHz with the thickness of 1.6 mm, and its effective absorption band reaches 4.3 GHz. Its compressive strength reaches 8.69 and 16.41 MPa in z and x/y directions, separately. This contribution has a guidance for the application of carbon fiber/ceramics matrix composites in harsh environment.

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“…SiC materials, including bulk SiC ceramic, SiC fiber, and SiC nanowires (NWs), are commonly used as structural and/or functional materials under extreme conditions due to their excellent mechanical strength, chemical inertness, and thermal stability 1–4 . Comparing with SiC bulk and fibers, SiC NWs exhibit unique properties, such as excellent flexibility and high tensile strength, and unique functions of one‐dimensional nanomaterials, 5–9 which brings them unique usage as strengthening and toughening reinforcements in ceramics, or as building blocks in deformable ceramic aerogels or electronic nanodevices 9–20 . For instance, the emerging SiC NW aerogels that are composed solely from SiC NWs usually exhibit ultralow density, ultralow thermal conductivity, and resilient compressibility.…”

Section: Introductionmentioning

confidence: 99%

Oxidation behavior of SiC nanowires: A nanowire radius‐dependent growth of oxide scale thickness

et al. 2022

J Am Ceram Soc.

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SiC nanowires (SiC NWs) possess both high thermal stability of SiC ceramic and one‐dimensional nanoscale features, which makes them highly attractive as reinforcements in ceramics or building units in resilient ceramic nanowires aerogels (NWAs) as well as blocks for electronic nanodevices. Understanding the oxidation behavior of SiC NWs at high temperatures is essential for their practical applications. Herein, we investigated the oxidation behavior of SiC NWs at 900–1200°C in air. Two oxidation stages were found, including an initial stage controlled by the reaction between oxygen and SiC at the SiO2/SiC interface and a subsequent oxygen diffusion–dependent stage. The oxide scale thickness was strongly influenced by the radius of the SiC NWs. With the increase of the NW radius from 40 to 120 nm, the oxidation activation energy of the oxidation process increases from 84.05 to 98.32 kJ/mol. The thermal insulation performances of SiC NWA, which is composed of SiC NWs, have been improved after oxidation. The evolution of the thermal insulation performance of SiC NWA during oxidation is consistent with the trends of the growth of the amorphous oxide layer, which indicates that exploring the oxidation kinetics is of great significance in understanding the high‐temperature behavior of SiC NW‐based materials. The present work provides insight into exploring the size effects on oxidation of SiC NWs, which may be helpful to further understanding the high‐temperature applications of SiC NWA.

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

Cited by 16 publications

References 35 publications

Additive Manufacturing of Resilient SiC Nanowire Aerogels

Additive Manufacturing of Resilient SiC Nanowire Aerogels

Multiscale SiCnw and carbon fiber reinforced SiOC ceramic with enhanced mechanical and microwave absorption properties

Oxidation behavior of SiC nanowires: A nanowire radius‐dependent growth of oxide scale thickness

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