in this research, graphene was synthesized by chemical vapor deposition (cvd) method in atmosphere pressure (14.7 psi). different functionalization method was used for oxidizing of graphene such as acid and alkaline treatments. the functionalized graphene (fg) was characterized by ftir and raman spectroscopy. nanofluid with water and different concentration (0.05, 0.15 and 0.25 wt %) of fg were...

Evidence from the early and late industrializes shows that technology, as the commercial application of scientific knowledge, has been a major driver of industrial and economic development. International technology transfer is now being recognized as having played an important role in the development of the most successful late industrializes of the second half of the 20th Century. Our society ...

Single-walled carbon nanotubes (SWNTs) are expected to be the most exciting material in the nanotechnology. In addition to the outstanding electronic, optical and mechanical properties, thermal properties of SWNTs are quite unique with the high thermal conductivity along the tube axis. The molecular dynamics studies of thermal conductivity of a nanotube and thermal conductance between a nanotub...

A combination of two methods chemical vapor deposition (CVD) diamond films, microwave plasma–assisted (MW CVD) and hot filament (HF CVD), was used for the growth 100 µm-thick polycrystalline (PCD) layers on Si substrates. The bow HF CVD MW films showed opposite convex\concave trends; thus, combined material allowed reducing overall by a factor 2–3. Using initial 25 PCD layer achieving much high...

Yttria-stabilized zirconia (YSZ) has been used as a thermal/environmental barrier coating for gas turbine engine blades. Current methods of fabrication include air plasma spraying (APS) and electron-beam physical vapor deposition (EB-PVD). The APS technique results in a coating that loses effectiveness with thermal cycling. The EB-PVD technique deposits a columnar microstructure which accommoda...

The reduction of electrode wear is very important for high finish and high accuracy machining in microEDM. Electrically conductive CVD diamond has shown almost zero electrode wear, even at short pulse duration of 3μs, which is extremely important for maintaining the desired shape. This research involves an investigation into the EDM performance of the electrically conductive CVD diamond with re...

A novel method is presented for growth of polycrystalline silicon films on amorphous substrates at temperatures of 540-575 “C. Grain nucleation and grain growth are performed in two steps, using Si nanocrystals as nuclei (“sceds’“,L The nanocrystal seeds are produced by excimer laser photolysis of disilane in a room temperature flow cell. Film (grain) growth occurs epitaxially on the seeds in a...

   In this research, Graphene was synthesized by chemical vapor deposition (CVD) method in atmosphere pressure (14.7 psi). Different functionalization method was used for oxidizing of graphene such as acid and alkaline treatments. The Functionalized graphene (FG) was characterized by FTIR and Raman spectroscopy. Nanofluid with water and different concentration (0.05, 0.15 and 0.25 wt %) of ...