Lightweight carbon-bonded carbon fiber composites with quasi-layered and network structure

Cheng, Haiming; Hong, Changqing; Zhang, Xinghong; Xue, Huafei

doi:10.1016/j.matdes.2015.07.091

Cited by 34 publications

(19 citation statements)

References 15 publications

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“…A minor part of the fibrous network thus becomes rigid as the freedom of movements within the bond points and the fibres is significantly reduced (see again Fig. 1) [22][23][24]. The delivery of the resin in the fabric is largely ruled by the way it is introduced into the web and how it flows in-between the fibres, but 5 wt.…”

Section: Methodsmentioning

confidence: 99%

Permeability of fibrous carbon materials

et al. 2019

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The air permeability of a number of commercial fibrous carbon materials: soft non-woven felts, rigidized felts and rigid boards, based on either PAN-or Rayon-derived fibres presenting various diameters, graphitised or not, and consolidated by different methods, was measured and investigated. Consistent behaviours were found within families of closely related materials, but the diversity of porous structures prevented any model, including the very popular Tomadakis-Sotirchos equation, to fit all results. The Archie's coefficient and the tortuosity factor for viscous flow were thus calculated. Not only all data were perfectly aligned on one single master curve, but the analysis was extended to many other fibrous materials and the same master curve was found to be relevant. The Archie's coefficient thus appears to be an intrinsic property, purely defined by the material geometry, as it does not depend on the 1D, 2D or 3D-type of flow. A fitting equation was proposed, encompassing all fibrous materials in very broad ranges of porosities and porous structures.

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Section: Methodsmentioning

confidence: 99%

Permeability of fibrous carbon materials

et al. 2019

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“…In the following non-elastic stage, the stress in xy direction decreasing with strain indicates that plastic instability occurs because of the buckling of bonded fibers. However, in z direction, linear elastic behavior at low strain, followed by a nanofoam collapse-related stress reduction at intermediate strains, and finally a plastic yielding plateau with subsequent stiffening at high strain 44 . The NCF-NP nanofoam is inclined to be tightly compressed and thus absorb more external energy, because most carbon fibers in NCF are perpendicular to the compressive force in z direction.…”

Section: Resultsmentioning

confidence: 98%

Super flame-retardant lightweight rime-like carbon-phenolic nanofoam

Cheng

Hong

Zhang

et al. 2016

Sci Rep

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The desire for lightweight nanoporous materials with high-performance thermal insulation and efficient anti-ablation resistance for energy conservation and thermal protection/insulation has greatly motivated research and development recently. The main challenge to synthesize such lightweight materials is how to balance the relationship of low thermal conductivity and flame retardancy. Herein, we propose a new concept of lightweight “rime-like” structured carbon-phenolic nanocomposites to solve this problem, where the 3D chopped network-structured carbon fiber (NCF) monoliths are incorporated with nanoporous phenolic aerogel to retain structural and functional integrity. The nanometer-scaled porous phenolic (NP) was synthesized through polymerization-induced phase separation and ambient pressure drying using phenolic resin (PR) solution as reaction source, ethylene glycol (EG) as solvent and hexamethylenetetramine (HMTA) as catalyst. We demonstrate that the as-prepared NCF-NP nanocomposite exhibits with a low density of 0.25–0.35 g/cm3, low thermal conductivity of 0.125 Wm−1K−1 and outstanding flame retardancy exceeding 2000 °C under arc-jet wind tunnel simulation environment. Our results show that the synthesis strategy is a promising approach for producing nanocomposites with excellent high-temperature heat blocking property.

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“…Lightweight carbon/carbon fiber composites can be divided into two categories according to the fiber length, and the two categories of molding methods are also different. e two categories are (a) short-cut carbon/carbon fiber composite (fiber lengths in the order of millimeters, such as 3-5 mm) and (b) long-fiber carbon/carbon fiber composite (fiber lengths in centimeters, such as 10 cm-15 cm) [16][17][18]. (a) Short-cut carbon/carbon fiber composite is represented by SGL group of Germany and Morgan Corporation of the United States.…”

Section: Introductionmentioning

confidence: 99%

Fabrication and Study on Thermal Conductivity, Electrical Properties, and Mechanical Properties of the Lightweight Carbon/Carbon Fiber Composite

Wang

Yang

et al. 2020

Journal of Chemistry

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In this paper, lightweight carbon/carbon fiber composite thermal field insulation materials were fabricated by the process method of long carbon fiber airflow netting-needle punching forming felt-resin impregnation-molding curing-high-temperature carbonization and graphitization. The microscopic morphology, conductivity, bending strength, and thermal conductivity of carbon/carbon fiber composites were measured by using the scanning electron microscope (SEM), four probes, electronic universal testing machine, and thermal analyzer. The results show that the long carbon fiber in the carbon/carbon fiber composite forms a three-dimensional structure of X-Y-Z with a density of 0.16 ± 0.02 g/cm3, which makes the composite material have excellent thermal insulation performance at high temperature, and the conductivity is 1452.4 S/m (plane direction) and 182.8 S/m (perpendicular to the plane direction), the compressive strength is 0.2 MPa (plane direction) and 1.31 MPa (perpendicular to the plane direction), the bending strength is 0.24 MPa (plane direction) and 1.1 MPa (perpendicular to the plane direction), and the thermal conductivity is 0.076 W/(mK) (25°C) and 0.17 W/(mK) (1200°C), respectively. The above process methods and test results will provide the application of the carbon/carbon fiber composite in the solar polysilicon furnace, single crystal silicon furnace, semiconductor furnace, sapphire furnace, fiber drawing furnace, and high-end metallurgical heat treatment furnaces, as well as applications in other high-temperature insulation environments, and also provide some suggestions in these insulation applications.

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Lightweight carbon-bonded carbon fiber composites with quasi-layered and network structure

Cited by 34 publications

References 15 publications

Permeability of fibrous carbon materials

Permeability of fibrous carbon materials

Super flame-retardant lightweight rime-like carbon-phenolic nanofoam

Fabrication and Study on Thermal Conductivity, Electrical Properties, and Mechanical Properties of the Lightweight Carbon/Carbon Fiber Composite

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