We report the characterization of aluminum oxide (Al2O3) films which are grown on Si substrates by electron beam evaporator. This paper focuses on the characteristic variation of Al2O3 films depending on the different annealing techniques, such as post-deposition annealing and post-metallization annealing. The capacitance-voltage (C-V) curves indicate a negative charge and interface trap charge...

Carbon nanomaterials (such as graphene, carbon nanotubes and nano-diamond) are widely used to synthesize metal matrix composites strengthen metals such Ti, Al Cu. However, severe aggregation of these nano-scale reinforcements within the has been a serious issue achieve good performance composites. In this study, we employed an in-situ co-precipitation method decorate reduced graphene oxides wit...

Wettability and interface microstructure were studied for Nb-containing melts in the contact with ceramic oxide materials of Al2O3-SiO2 system. Ni-40.5 at.%Nb and Au-(0-20) at.%Nb alloys were investigated as prospective alloys for high temperature brazes. Ceramic samples ranged in composition from pure Al2O3 to pure SiO2. The wettability was measured by the sessile drop method. Microstructure o...

This paper shows an influence of chemical composition of used electrolyte, such as amount of sulphuric acid in electrolyte, amount of aluminium cations in electrolyte and amount of oxalic acid in electrolyte, and operating parameters of process of anodic oxidation of aluminium such as the temperature of electrolyte, anodizing time, and voltage applied during anodizing process. The paper shows t...

This paper reports an approach to coat a ceramic layer on aluminium alloys by means of chemical reaction. The reaction product of Al,0, layer of 100 pm in thickness has been formed using a powder mixture of silicon oxide and aluminium by laser processing. It turns out that the large amount of heat from the exothermic reaction has a predominate effects on the formation of the oxide layer. Furthe...

Reproducible scanning tunneling microscopic (STM) images were obtained from ultrathin Al2O3 ®lms epitaxially grown on Re…0001†. Initially, the oxide ®lms grow two-dimensionally in a layer-by-layer fashion with well-ordered surface morphologies. As the oxide ®lm thickens to ca. 9 monolayer equivalents (MLE), the surface roughens and becomes more disordered yet still exhibits signi®cant long-rang...

A current strategy in material science and nanotechnology is the creation of green metal oxide nanoparticles. Citrus aurantium peel extract was used to create aluminium nanoparticles (Al2O3 NPs) an efficient, affordable, environmentally friendly, simple manner. Various characterisation methods such as UV-vis spectrophotometer (UV), X-ray diffraction (XRD), Fourier transform infrared spectroscop...

Three-dimensional bulk alumina and its two-dimensional thin films show great structural diversity, posing considerable challenges to their experimental structural characterization and computational modeling. Recently, structural diversity has also been demonstrated for zero-dimensional gas phase aluminum oxide clusters. 4] Mass-selected clusters not only make systematic studies of the structura...

Aluminium alloy components are used in lightweight engineering applications and lack mechanical properties, wear resistance, corrosion resistance. When hard reinforcement particulates dispersed the aluminium matrix alloy, composites (AMCs) formed. This new material exhibits enhanced properties such as better specific stiffness, strength, elastic modulus, lightweight. AMCs have many favorable co...

The condensation of acetone using anhydrous hydrogen chloride results after three weeks at room temperature, in a 1 5 % yield of phorone (4) and a 7 5 % yield of mesityl oxide (5). In the presence of one weight percent of the Lewis acid, aluminium chloride, the yield of 4 is increased to 3 9 % . An increase in the amount of the Lewis acid, aluminium chloride, to ten weight percent results in a ...