This proposed research program will seek to learn the failure mechanisms of multidirectionally woven carbon-carbon composites when subjected to fatigue leading, and characterize this material's potential for use in internal prosthetic devices, e .g . hip and knee implants . Carbon-carbon composites are graphite fiber bundles embedded in a carbon matrix . Currently, implants are made of metals s...

Carbon fiber reinforced plastic (CFRP) is a composite material made of carbon fibers and resin, widely used because its light weight, corrosion resistance, durability. However, excellent properties make it difficult to recycle, most the CFRP waste landfilled. A new recycling technology recover from desired. In this study, method decompose resin part by heating with sodium hydroxide (NaOH) high ...

0266-3538/$ see front matter 2011 Elsevier Ltd. A doi:10.1016/j.compscitech.2011.09.011 ⇑ Corresponding author. Tel.: +1 716 645 3977. E-mail address: [email protected] (D.D.L. Chu The low through-thickness thermal conductivity limits heat dissipation from continuous carbon fiber polymer–matrix composites. This conductivity is increased by up to 60% by raising the curing pressure from 0.1 to...

We present measurements of the low-temperature thermal conductivity of a number of polymeric and composite materials from 0.3 to 4 K. The materials measured are Vespel SP-1, Vespel SP-22, unfilled PEEK, 30% carbon fiber-filled PEEK, 30% glass-filled PEEK, carbon fiber Graphlite composite rod, Torlon 4301, G-10/FR-4 fiberglass, pultruded fiberglass composite, Macor ceramic, and graphite rod. The...

We present the photovoltaic properties of heterojunctions made from single-walled carbon nanotube (SWNT) fibers and n-type silicon wafers. The use of the opaque SWNT fiber allows photo-generated holes to transport along the axis direction of the fiber. The heterojunction solar cells show conversion efficiencies of up to 3.1% (actual) and 10.6% (nominal) at AM1.5 condition. In addition, the use ...

We apply THz imaging technology to evaluate fire damage to a variety of carbon fiber composite samples. The majority of carbon fiber materials have polarization-dependent reflectivities in the THz frequency range, and we show how the polarization dependence changes versus the burn damage level. Additionally, time domain information acquired through a THz time-domain spectroscopy (TDS) system pr...

Continuous carbon fiber polymer–matrix composites in unprecedented antiferroelectric coupling, as enabled by stacking composites with positive value (up to 400) and negative value (down to -600) of the electric permittivity, provide exceptionally high through-thickness permittivity up to 78,000 (B2.0 MHz), corresponding to a capacitance of 370 lF/m. The high capacitance is consistent with the e...

Deep brain stimulation (DBS), a surgical technique to treat certain neurologic and psychiatric conditions, relies on pre-determined stimulation parameters in an open-loop configuration. The major advancement in DBS devices is a closed-loop system that uses neurophysiologic feedback to dynamically adjust stimulation frequency and amplitude. Stimulation-driven neurochemical release can be measure...

Due to the problems of potential corrosion and thermal expansion differences between traditional metal connecting pieces and carbon fiber poles, it is difficult for them to meet the operating requirements of truss structures in the environment of stratosphere. Based on the large scale composite space truss structure of stratosphere aerostats, the carbon fiber flange connection joints were studi...