Nano Carbons

In this study, the behavior of three different discs consisting of AS4 carbon fiber, T-300 carbon, and Al₂O₃ZrO₂ (nanocomposite) materials at constant temperature was investigated by the numerical analysis method. Nanocomposites are formed by the dispersion of nanometer-sized particles in a matrix. With the advantages that nanocomposites bring to the material, they increase heat resistance in general. Carbon fibers, on the other hand, are preferred in the aerospace industry and aircraft industry due to their high strength properties. In this study, it was assumed that the modulus of elasticity does not change with temperature. The temperatures applied to the discs are 45 ℃, 60 ℃, 75 ℃, 90 ℃, and 105 ℃, respectively. It has been observed that the radial and tangential stress values obtained at high temperatures are higher than at low temperatures. The Al₂O₃ZrO₂ nanocomposite materials have found that the stresses occurring in the Al₂O₃ZrO₂ (nanocomposite) disc are higher than the stresses occurring in the AS4 carbon fiber disc. The stresses obtained on the AS4 carbon fiber disc are T-300 carbon discs.

This work presents the analytical analysis for free linear vibration behavior of functionally graded-carbon nanotubes reinforced composite (FG-CNTRC) nanoplates in the framework of nonlocal strain gradient theory (NSGT) and the first-order shear deformation plate theory (FSDPT). The nanoplate is considered made of a mixture of an isotropic polymer matrix and reinforced carbon nanotubes (CNTs). Four different distributions of CNTs are examined including uniformly distributed and FG reinforcements (FG-O, FG-X, and FG-V). The governing equations of motion are established based on the Hamilton’s principle. The closed-form analytical solution for the natural frequency of FG-CNTRC nanoplates with simply supported all edges is carried out by using the Navier-type solution. The impact of some key parameters on the natural frequencies of FG-CNTRC nanoplates is also studied and discussed. The result shows that FG-CNTRC nanoplates reveal the softening- or hardening-stiffness effects depending on the relationship between the nonlocal parameter and the material length scale parameter. The aspect ratios of FG-CNTRC nanoplates, the volume fraction, and the distribution pattern of CNTs have also an important impact on the vibration behavior of FG-CNTRC nanoplates.

In this work, surface functionalization of an insulating glass substrate was performed and it was hybridized with conducting carbon fiber materials, carbon coils. Glass substrate was carried out via different chemical treatments, then an amine terminated self-assembled monolayer was introduced on its surface. Carbon coils were also treated with nitric acid. These surface modified carbon coils, glass substrates, and carbon coils immobilized on glass substrates were analyzed through different analytical tools. Finally, hybridization of carbon coils on glass substrates resulted only in functionalized glass (amine terminated) surfaces via chemical bonding, while the un-functionalize glass substrate did not. Thus, such a stable, recognized practice can apply to fabricate simple microarrays to bind carbon materials or biomolecules for further application.