Carbon Reinforcements and Carbon/Carbon Composites

Fitzer, E.; Manocha, L.M.

doi:10.1007/978-3-642-58745-0

Cited by 259 publications

(214 citation statements)

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“…The fractions of acid groups participating in H-bonding are calculated from the reported improvements in the ILSS assessed from the application of different chemical blocking agents to eliminate H-bonds specific to given acid group. [30][31][32] Column two shows the fraction f hydroxyl of hydroxyl groups and column three the fraction f acid of other acid groups participating in the bonding. f hydroxyl and f acid are calculated from the reported improvements in the ILSS.…”

Section: H-bond Contibution To the Interlaminar Shear Strength Omentioning

confidence: 99%

“…f hydroxyl and f acid are calculated from the reported improvements in the ILSS. [30][31][32] Following the findings of Horie et al, 6 we assume that the other acids groups are dominantly carboxyl groups and use the properties associated with carboxyl groups in the present calculations. Column four lists the reported experimental measurements of the ILSS.…”

Section: H-bond Contibution To the Interlaminar Shear Strength Omentioning

confidence: 99%

“…Column four lists the reported experimental measurements of the ILSS. [30][31][32] Column five shows the magnitude of the H-bond contribution |τ| to the ILSS calculated from τ = 0.6σ, where σ is calculated from Eq. (5), and from the values of f hydroxyl and f acid given in columns two and three.…”

Section: H-bond Contibution To the Interlaminar Shear Strength Omentioning

confidence: 99%

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Hydrogen bonds, interfacial stiffness moduli, and the interlaminar shear strength of carbon fiber-epoxy matrix composites

Cantrell

2015

AIP Advances

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The chemical treatment of carbon fibers used in carbon fiber-epoxy matrix composites greatly affects the fraction of hydrogen bonds (H-bonds) formed at the fiber-matrix interface. The H-bonds are major contributors to the fiber-matrix interfacial shear strength and play a direct role in the interlaminar shear strength (ILSS) of the composite. The H-bond contributions τ to the ILSS and magnitudes KN of the fiber-matrix interfacial stiffness moduli of seven carbon fiber-epoxy matrix composites, subjected to different fiber surface treatments, are calculated from the Morse potential for the interactions of hydroxyl and carboxyl acid groups formed on the carbon fiber surfaces with epoxy receptors. The τ calculations range from 7.7 MPa to 18.4 MPa in magnitude, depending on fiber treatment. The KN calculations fall in the range (2.01 – 4.67) ×1017 N m−3. The average ratio KN/|τ| is calculated to be (2.59 ± 0.043) × 1010 m−1 for the seven composites, suggesting a nearly linear connection between ILSS and H-bonding at the fiber-matrix interfaces. The linear connection indicates that τ may be assessable nondestructively from measurements of KN via a technique such as angle beam ultrasonic spectroscopy.

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Section: H-bond Contibution To the Interlaminar Shear Strength Omentioning

confidence: 99%

Section: H-bond Contibution To the Interlaminar Shear Strength Omentioning

confidence: 99%

Section: H-bond Contibution To the Interlaminar Shear Strength Omentioning

confidence: 99%

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Hydrogen bonds, interfacial stiffness moduli, and the interlaminar shear strength of carbon fiber-epoxy matrix composites

Cantrell

2015

AIP Advances

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“…Carbon/carbon (C/C) composites are used in demanding thermostructural applications [1][2][3] -e.g. heat shields of space vehicles, nozzles of rocket thrusters, aircraft and formula one brake disks, diverters of nuclear fusion reactors [4].…”

Section: Introductionmentioning

confidence: 99%

Analytical modeling of the transient ablation of a 3D C/C composite

Lachaud

Aspa

Vignoles

2017

International Journal of Heat and Mass Transfer

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Experimental studies have shown that dense C/C composites feature a complex surface ablation behavior under oxidation conditions. Their effective reactivity is not an additive property with respect to the intrinsic reactivities of their components. Typical surface roughness patterns progressively appear and the effective reactivity increases with time until it reaches a steady state value. In a previous work, the steady-state behavior of a 3D C/C composite has been modeled and explained. Here, the work has been extended to address the transient regime behavior. The surface roughness evolution and the effective reactivity are computed versus time. The model is validated by comparison with experimental data. These theoretical results provide for the first time a comprehensive understanding of the complex ablation process occurring at the surface of dense C/C composites.

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“…Therefore carbon-carbon composites are widely used in aerospace industries like brake disk, nose tips and engine components, heat exchanger, diesel engine components, refractory material, hot press die components, crucible etc. [1]. However, in oxidative environment, carbon-carbon composites get oxidized at 450 o C. Therefore the need exists to give oxidation protection coatings on to carbon-carbon composite and graphite materials for their application at high temperature.…”

Section: Introductionmentioning

confidence: 99%

Silicon Carbide Coating on Graphite and Isotropic C/C Composite by Chemical Vapour Reaction

Manocha¹,

Patel²,

Manocha³

2007

Carbon letters

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The application of Carbon and graphite based materials in unprotected environment is limited to a temperature of 450 o C or so because of their susceptibility to oxidation at this temperature and higher. To over come these obstacles a low cost chemical vapour reaction process (CVR) was developed to give crystalline and high purity SiC coating on graphite and isotropic C/C composite. CVR is most effective carbothermal reduction method for conversation of a few micron of carbon layer to SiC. In the CVR method, a sic conversation layer is formed by reaction between carbon and gaseous reagent silicon monoxide at high temperature. Characterization of SiC coating was carried out using SEM. The other properties studied were hardness density and conversion efficiency.

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Carbon Reinforcements and Carbon/Carbon Composites

Cited by 259 publications

References 0 publications

Hydrogen bonds, interfacial stiffness moduli, and the interlaminar shear strength of carbon fiber-epoxy matrix composites

Hydrogen bonds, interfacial stiffness moduli, and the interlaminar shear strength of carbon fiber-epoxy matrix composites

Analytical modeling of the transient ablation of a 3D C/C composite

Silicon Carbide Coating on Graphite and Isotropic C/C Composite by Chemical Vapour Reaction

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