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The influences of carbon nanotubes (CNTs) introduced in three different phases of carbon fiber/pyrolytic carbon/silicon carbide (Cf/PyC/SiC) composites on the microstructure and properties of the composites were investigated in this paper. The results showed with CNTs introduced at PyC-PyC interface, tensile strength and work of fracture (WOF) of a Cf/PyC/SiC composite had the largest increase, and...
Carbon fiber reinforced carbon composites (Cf/C) were first joined by combining electric field-assisted sintering technology and using a Ti3SiC2 (TSC) tape film as interlayer. A joint with shear strength of 26.3 ± 1.7 MPa was obtained within 12 min at a joining temperature of 1200 °C. The joint morphology, interface reaction, shear fracture behavior, and joining mechanism were investigated in detail...
Copper matrix composites reinforced with graphene nanoplatelets (GNPs) were prepared via molecular-level mixing process and spark plasma sintering process. The impacts of graphene content on microstructure, mechanical performance, thermal diffusivity, electrical conductivity and tribological properties of the composites were investigated. For microstructure, GNPs distributed randomly in composites...
We determined the distribution and biocompatibility of graphene oxide (GO) in mice by using radiotracer technique and a series of biological assays. Results showed that GO was predominantly deposited in the lungs, where it was retained for a long time. Compared with other carbon nanomaterials, GO exhibited long blood circulation time (half-time 5.3±1.2h), and low uptake in reticuloendothelial system...
Gold nanoparticles (GNPs) with attached C 60 molecules (C 60 -GNPs) were prepared through the amination reaction of fullerene C 60 with peripheral amino groups located on the surface of gold. Molecules of 4-aminobenzenethiol/1-hexanethiol containing amino groups were introduced onto the surface of gold by the reduction of a gold salt (HAuCl 4 ) with sodium borohydride...
To explore the effects of the novel properties of carbon nanoparticles (CNPs) on cytotoxicity, the adsorption of serum proteins in cell culture medium on multi-walled carbon nanotubes and three kinds of carbon blacks was investigated. The uptake of CNPs by Hela cells was measured quantitatively using 99m Tc radionuclide labeling and tracing techniques, and the dependence of CNPs uptake on...
Mesocarbon microbeads (MCMB) as Pt catalyst supports were characterized by X-ray electron diffraction, thermal field emission scanning electron microscope and electrochemical analysis. MCMB with different pretreatment were used as the catalyst supports. The XRD patterns show the existence of Pt and the micrograph of SEM shows Pt is absorbed uniformly on the surface of MCMB particles and the platinum...
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