the potential of carbon nanotubes (cnt) supported cobalt catalysts for fischer-tropsch (ft) reaction is shown. using the wet impregnation method cobalt on carbon nanotubes catalysts were prepared with cobalt loading varying from 15 to 45 wt. %. the catalysts are characterized by different methods including: bet physisorption, x-ray diffraction, hydrogen chemisorption, and temperature-programmed...

The viscosity of polydispersed graphene nanosheet (5 nm–1.5 lm) suspensions (GNS) and its behavior with temperature and concentration have been experimentally determined. A physical mechanism for the enhanced viscosity over the base fluids has been proposed for the polydispersed GNSs. Experimental data reveal that enhancement of viscosity for GNSs lies in between those of carbon nanotube suspen...

3D printing technologies have expanded the possibilities of fabricating new composite materials with tailored properties, which depend on both selected and structural design at multiple length scales. Here, a catalyst-free CVD method has been used to produce hybrid based printed cellular ?-Al2O3 substrates decorated by either nanocrystalline graphene or graphitic films tunable number layers. Gr...

Sealing treatment is a post-surface of the plasma spray coating process to improve corrosion resistance material. In this study, effect sealing on and adhesive strength spray-coated alumina coatings was analyzed. For sealing, an epoxy resin applied surface coated specimen using brush. The subjected salt test for up 48 hours microstructural analysis revealed that in layer/base material interface...

The effects of sandblasting media and steam cleaning treatment after sandblast were examined on tensile bond strength of porcelain to titanium. The use of the commercially available silica-coated alumina particles for sandblast was significantly effective for increasing bond strength than the conventional alumina. It might be due to the increased surface roughness and existence of remaining sil...

During aging processing, black carbon (also called soot) particles may tend to be mixed with other aerosols, and highly influence their radiative forcing. In this study, freshly emitted soot particles were simulated as fractal aggregates composed of small spherical primary monomers. After aging in the atmosphere, soot monomers were coated by a thinly layer of sulfate as thinly coated soot parti...