Thermal Conductivity of Needle Punched Preforms made of Carbon and OxiPAN Fibres

Lee, Jae Yeol; Kang, Tae Jin

doi:10.1177/096739110501300107

Cited by 4 publications

(2 citation statements)

References 13 publications

(15 reference statements)

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“…These results correlate well with the results obtained by µCT analysis. A similar effect has been observed in previous studies [ 64 , 65 , 66 ], which confirmed the influence of needle-punching density on thermal conductivity by producing a series of CFs with different needle-punching densities. Therefore, the combined effects of the conductive nature and orientation of the carbon fibers influences the anisotropic heat transfer behavior.…”

Section: Resultssupporting

confidence: 91%

Mechanical and Thermal Behavior of Fibrous Carbon Materials

et al. 2021

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The ability of various commercial fibrous carbon materials to withstand stress and conduct heat has been evaluated through experimental and analytical studies. The combined effects of different micro/macro-structural characteristics were discussed and compared. Large differences in mechanical behavior were observed between the different groups or subgroups of fibrous materials, due to the different types of fibers and the mechanical and/or chemical bonds between them. The application of the Mooney–Rivlin model made it possible to determine the elastic modulus of soft felts, with a few exceptions, which were studied in-depth. The possible use of two different mechanical test methods allowed a comparison of the results in terms of elastic modulus obtained under different deformation regimes. The effective thermal conductivity of the same fibrous materials was also studied and found to be much lower than that of a single carbon fiber due to the high porosity, and varied with the bulk density and the fiber organization involving more or less thermal contact resistances. The thermal conductivity of most materials is highly anisotropic, with higher values in the direction of preferential fiber orientation. Finally, the combination of compression and transient thermal conductivity measurement techniques allowed the heat conduction properties of the commercial fibrous carbons to be investigated experimentally when compressed. It was observed that thermal conductivity is strongly affected under compression, especially perpendicular to the main fiber orientation.

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Section: Resultssupporting

confidence: 91%

Mechanical and Thermal Behavior of Fibrous Carbon Materials

et al. 2021

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“…The barbs on the needles hook some fibers in the layered materials and insert them vertically in descending motion. These third direction fibers provide a reinforcing effect between the layers and improved the delaminating behavior of the bi-directional composites [22][23][24]. These preforms are suitable for producing small and complex composite parts.…”

Section: Needle-punch Preformmentioning

confidence: 99%

SiC-Based Composites Through Liquid Infiltration Routes

Kumar¹,

Ranjan²,

Manocha³

et al. 2019

Handbook of Advanced Ceramics and Composites

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Carbon fiber-reinforced silicon carbide matrix composites (called C/SiC or C/C-SiC) represent a relatively new class of structural materials. These composites have emerged as one of the most promising materials for high-temperature applications in defense and aerospace sectors. They are fabricated via chemical vapor infiltration (CVI), polymer impregnation and pyrolysis (PIP), and liquid silicon infiltration (LSI) processing routes. Several new manufacturing processes have been developed during the last few years such as short fiber reinforcements' based and cheap ceramic precursor polymer based. These composites possess high mass-specific properties, structural and dimensional stability at high temperature, low coefficient of thermal expansion, high thermal conductivity, and reasonable oxidation resistance. These properties have increased the importance of the C/SiC composites and thus make them as most preferred materials for the aerospace, defense, and civil/industrial applications like thrust vectoring control vanes, nozzles, brake disks and pads, clutches, furnace charging devices, etc. This chapter presents the processing and characterization of the C/SiC composite fabricated by liquid infiltration routes, viz., PIP and LSI. Typical properties of the C/SiC composites like mechanical, thermal, and ablative are presented. Few established and potential application of these composites are discussed briefly.

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