Resistivity of pristine and intercalated graphite fiber epoxy composites

Gaier, James R.; Hambourger, Paul D.; Slabe, Melissa E.

doi:10.1016/0008-6223(91)90199-s

Cited by 9 publications

(6 citation statements)

References 7 publications

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“…The Seebeck coefficient of HNO 3 intercalated CVD carbon fibers is 15 µV • C −1 at 300 K [74]. Extrapolation of the data of [81] to 500 K gave a value of less than 20 µV • C −1 . The values obtained in this work for intercalated fibers are considerably higher in magnitude.…”

Section: Resultsmentioning

confidence: 96%

Self-sensing attained in carbon-fiber–polymer-matrix structural composites by using the interlaminar interface as a sensor

Wang

Kowalik

Chung

2004

Smart Mater. Struct.

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Self-sensing is valuable for structural materials, especially those for smart structures. It does not involve the use of embedded or attached sensors, as the structural material is itself the sensor. Self-sensing was attained in carbon-fiber-polymer-matrix structural composites by using the interlaminar interface (i.e., the interface between the laminae of continuous fibers) as a sensor. The attributes sensed were temperature, moisture, damage, and stress. In the case of temperature sensing, the interlaminar interface functioned as either a thermistor or a thermocouple junction. The thermocouple approach required the fibers in the contacting laminae to be dissimilar, whereas the thermistor approach did not. By using two crossply laminae, a two-dimensional array of sensors was attained for spatial distribution sensing.

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Section: Resultsmentioning

confidence: 96%

Self-sensing attained in carbon-fiber–polymer-matrix structural composites by using the interlaminar interface as a sensor

Wang

Kowalik

Chung

2004

Smart Mater. Struct.

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“…1 Vapor phase intercalation of 2000 filament tows of P-100 by IBr was carried out at 60 ± C for 48 h following the method of Wessbecher et al 3 These fibers were then hand woven into 0 ± -90 ± fabrics at a density of 10 tows per inch. Br 2 intercalation was carried out in the vapor phase at room temperature.…”

Section: Methodsmentioning

confidence: 99%

“…1 One application for which these intercalated graphite composites have been proposed is electromagnetic interference (EMI) shielding covers. They are replacing metals, such as aluminum (Al) alloys, which have poorer mechanical properties and higher densities.…”

Section: Introductionmentioning

confidence: 99%

Effect of intercalation in graphite epoxy composites on the shielding of high energy radiation

et al. 1998

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The half-thickness and mass absorption coefficient of 13.0 keV x-rays, 46.5 keV g-rays, and 1.16 MeV b ™ particles have been measured for pristine, bromine intercalated, and iodine monobromide intercalated pitch-based graphite fiber composites. Since these materials have been proposed to replace aluminum structures in spacecraft, the results were compared to aluminum. Pristine graphite epoxy composites were found to have about 4.0 times the half-thickness, and 40% of the mass absorption of aluminum for ionizing radiation. Bromine intercalation improved performance to 90% of the half-thickness, and 1.7 times the mass absorption coefficient of aluminum. Iodine monobromide extended the performance to 70% of the half-thickness and 3.0 times the mass absorption of aluminum. Thus, intercalation not only makes up the deficiency conventional composites have in shielding components from ionizing radiation, but actually confers advantages in mass and thickness over aluminum. The b ™ particle shielding of all the materials tested was found to be very effective. The shielding of all of the materials was found to have nearly the same mass absorption coefficient of 17.8 6 0.9 cm 2 ͞g. Inelastic scattering processes were found to be important in b ™ particle shielding; however, the extent of inelastic scattering and thus the distribution of energies of the transmitted electrons did not vary with material.

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“…Although considerable attention has been given to intercalated carbon fibers, little attention has been given to composites that involve these fibers [36][37][38].…”

Section: Polymer-matrix Compositesmentioning

confidence: 99%

Composite materials for thermoelectric applications

Chung

2003

Engineering Materials and Processes

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Resistivity of pristine and intercalated graphite fiber epoxy composites

Cited by 9 publications

References 7 publications

Self-sensing attained in carbon-fiber–polymer-matrix structural composites by using the interlaminar interface as a sensor

Self-sensing attained in carbon-fiber–polymer-matrix structural composites by using the interlaminar interface as a sensor

Effect of intercalation in graphite epoxy composites on the shielding of high energy radiation

Composite materials for thermoelectric applications

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