Electrical Properties of Nickel-Coated Carbon-Fiber/ Nylon 66 Composite

Hussain, Fida; Zihlif, A. M.

doi:10.1177/089270579300600203

Cited by 21 publications

(10 citation statements)

References 9 publications

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“…On the other hand, the rapid decrease of impedance values indicates a response with alternating electric field. This behavior may be attributed to reduction of the interfacial polarization effect, which may be due to the electrode-specimen surface [12,13].…”

Section: Resultsmentioning

confidence: 99%

Dielectric and AC Conductivity of Rockwool Fibers-Polystyrene Composites

Nofal

Zihlif

2010

Journal of Reinforced Plastics and Composites

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The dielectric and AC conductivity of rockwool fibers-polystyrene composites were studied as a function of frequency, temperature, and rockwool concentration through impedance measurements. It was observed that the AC conductivity and the dielectric constant are increased by increasing the rockwool content in the composite. The observed electrical results fit approximately the reported empirical equations concerning the AC conductivity and dielectric behavior of polymer composites. The dielectric behavior of the prepared composites is mainly attributed to the dielectric properties of the rockwool filler. The dielectric results were explained on the basis of the interfacial (space charge) and dipolar polarizations.

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Section: Resultsmentioning

confidence: 99%

Dielectric and AC Conductivity of Rockwool Fibers-Polystyrene Composites

Nofal

Zihlif

2010

Journal of Reinforced Plastics and Composites

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“…This behavior may be attributed to reduction of the interfacial polarization effect, which may be due to the electrode-specimen surface. 12 The behavior of the dielectric constant (e 0 ), calculated from Equation 3, with frequency at room temperature for specimens of different carbon fiber concentrations is shown in Figure 2(a). The high values of (e 0 ) with increasing frequency may be explained on the basis of space charge polarization (Wagner-Maxwell effect) which slightly enhances and compensates for the decrease caused by the orientation polarization.…”

Section: Resultsmentioning

confidence: 99%

Electrical properties of conductive network in carbon fibers/polymer composites

Ayish

Zihlif

2010

Journal of Reinforced Plastics and Composites

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The electrical properties of PAN-based carbon fibers/polycarbonate composites were studied using the AC impedance technique. Impedance, dielectric constant, dielectric loss, relaxation time, and AC-conductivity showed frequency, temperature, and carbon fiber-concentrations dependence. It was found that the dielectric constant and dielectric loss of the prepared composites increase with the increase in the carbon fiber concentration and decreasing frequency. The thermoelectrical behavior was studied as a function of temperature for the composite of 18 wt% fibers concentration. It was found that the dielectric constant and AC-conductivity increase with temperature, while the activation energy decreases. The observed AC electrical results are explained as a function of fiber concentration and temperature, based on the hopping of conducting impurities and complexes into localized energy states.

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“…Still other coatings serve as coupling agents between the fiber and the matrix, due to the presence of reactive functional groups, such as epoxy groups [61] and amine groups [62]. Metal (e.g., nickel and copper) coatings are used not only for enhancing the electrical properties [63,64], but also for improving the adhesion between fiber and the epoxy matrix [65].…”

Section: Interface Engineeringmentioning

confidence: 99%

Science of composite materials

Chung

2003

Engineering Materials and Processes

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Composite materials are those containing more than one phase such that the different phases are artificially blended together. They are not multiphase materials in which the different phases are formed naturally by reactions, phase transformations or other phenomena.A composite material typically consists of one or more fillers (fibrous or particulate) in a certain matrix. A carbon fiber composite is one in which at least one of the fJ.llers is composed of carbon fibers, either short or continuous, unidirectional or multidirectional, woven or non-woven. The matrix is usually a polymer, a metal, a carbon, a ceramic or a combination of different materials. Except for sandwich composites, the matrix is three-dimensionally continuous, whereas the fJ.ller can be three-dimensionally discontinuous or continuous. Carbon fiber fJ.llers are usually three-dimensionally discontinuous, unless the fibers are three-dimensionally interconnected by weaving or by the use of a binder such as carbon.The high strength and modulus of carbon fibers make them useful as a reinforcement for polymers, metals, carbons and ceramics, even though they are brittle. Effective reinforcement requires good bonding between the fibers and the matrix, especially for short fibers. For an ideally unidirectional composite (i.e., one containing continuous fibers all in the same direction) containing fibers of much higher modulus than that of the matrix, the longitudinal tensile strength is quite independent of the fiber-matrix bonding, but the transverse tensile strength and the flexural strength (for bending in longitudinal or transverse directions) increase with increasing fiber-matrix bonding. On the other hand, excessive fiber-matrix bonding can cause a composite with a brittle matrix (e.g., carbon and ceramics) to become more brittle, as the strong fiber-matrix bonding causes cracks to propagate in a straight line in a direction perpendicular to the fiber-matrix interface, without being deflected to propagate along this interface. In the case of a composite with a ductile matrix (e.g., metals and polymers), a crack initiating in the brittle fiber tends to be blunted when it reaches the ductile matrix, even when the fiber-matrix bonding is strong. Therefore, an optimum degree of fiber-matrix bonding (i.e., not too strong and not too weak) is needed for brittle-matrix composites, whereas a high degree of fiber-matrix bonding is preferred for ductile-matrix composites.The mechanisms of fiber-matrix bonding include chemical bonding, interdiffusion, van der Waals bonding and mechanical interlocking. Chemical

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Electrical Properties of Nickel-Coated Carbon-Fiber/ Nylon 66 Composite

Cited by 21 publications

References 9 publications

Dielectric and AC Conductivity of Rockwool Fibers-Polystyrene Composites

Dielectric and AC Conductivity of Rockwool Fibers-Polystyrene Composites

Electrical properties of conductive network in carbon fibers/polymer composites

Science of composite materials

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