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High demand on materials to increase the overall performance of automotive and aerospace components has forced the development of composite materials. Among the various composites, Aluminium Metal Matrix Composites (AMMC) are widely used to fulfill the emerging industrial needs. This paper deals with the investigation of mechanical properties of AMMC produced by the stir casting technique for various...
In the present study a DGEBA based epoxy resin and glass fiber (GF) [70:30] combination was reinforced with different weight percentages (0.5, 1.0 and 1.5 wt%) of POSS (polyhedral oligomeric silsesquioxane) and cured with polyamidoimidazoline curing agent (Aradur 140) at room temperature. The amine functionalized POSS was synthesized via an ONPS (octa(nitrophenyl)silsesquioxane) intermediate. The...
In this study, preparation of Sn and Si co-doped (0–3 mol% Sn and Si) ZnO dip-coated thin films on a glass substrate via the sol–gel process have been investigated. The effects of Sn and Si content on the structural and optical properties of applied thin films have been studied by X-ray diffraction (XRD), scanning electron microscopy (SEM) and UV-vis spectroscopy. XRD patterns showed a decrease in...
Polyamidoamine modified organo-montmorillonites (OMMT) bearing flame-retardant elements were prepared through montmorillonite (MMT) and polyamidoamines with different generations. These materials turned out to be a possible use for the flame-retardency of polymers. Different generations of dendrimers, G1.0, G2.0, and G3.0, were synthesized from a cyclotriphosphazene core. Characteristics of these...
New glaze compositions were synthesized from combinations of ceramic glaze and cement kiln dust. The products show very good chemical resistance to acid and alkaline corrosion, with no visual changes on the surfaces of the samples. This resistance can be attributed to the very well balanced composition of wastes and commercial ceramic glaze materials. Corrosion data reveal the results of mass loss...
Five bismuth vanadate glass samples and their corresponding glass-ceramics containing Bi2O3 ranging between 10-40 mol% were prepared by melting and controlled heat treatment, respectively. The prepared samples were investigated by XRD, FTIR, and TEM. Some specimens were also subjected to magnetization testing. The glass samples containing higher content of V2O5exhibited precipitation of BiVO4 phase...
Optical absorption spectra of prepared undoped zinc phosphate glass together with samples containing additional Bi2O3 (2.5, 5, 10, 15%) were measured within the range 200–1100 nm before and after gamma irradiation. The spectrum of the undoped glass reveals strong UV absorption which is related to the presence of trace ferric ions (Fe 3+) present as unaviodable impurities within theraw materials. Bi...
Optical properties of xBaO–5ZnO–5MgO–14Na2O–1Li2O–(75x)B2O3 glasses (where x = 0, 10, 20, 30, 40, and 50 mol %) were performed using a UV-Visible spectrophotometer in the spectral range 190–1100 nm. Various optical parameters such as optical band gap, Urbach energy, refractive index, electronic polarizability and optical basicity were deduced. The glassy phase of the samples was checked using X-ray...
The erosion wear behaviors of unboiled (UB) and boiled eggshells filler reinforced epoxy composites have been characterized. The eggshells epoxy composites have been fabricated using a hand layup technique and the samples have been exposed to different environmental conditions i.e. dry, saline, mineral, kerosene and subzero temperature. To examine the effect of the above mentioned environmental conditions...
The purpose of this study is to prepare calcium silicate powder and to develop an optimal formulation based on calcium silicate for low-dose drug delivery. The calcium silicate powder was prepared via the co-precipitation method using calcium nitrate and sodium silicate as precursors. The calcium silicate-based system is composed of three components: calcium silicate, sodium silicate, and citric acid...
3-aminopropyltriethoxysilane was acrylated using the Michael addition reaction. After that, magnetite nanoparticles were coupled with the silane dispersion. The structure of poly(amino-ester) dendrons grafted on the surface of magnetite nanoparticles was characterized by FTIR spectroscopy and thermogravimetric analysis. Generally, in the convergent method structural control is better than in the divergent...
The Code for Highly-excIted Valence Electron Systems (CHIVES) performs fast first-principles molecular-dynamics simulations of silicon under the extreme conditions induced by an intense ultrashort laser pulse. We illustrate this by the example of thermal phonon squeezing.
This paper reports the development and characterization of nano-hybrid coatings using tetraglycidyl 2,2-bis(4-(4-amine phenoxy)phenyl)propane (TGBAPPP) and 3-aminopropyltriethoxysilane (APTES) functionalized ZnO as nano-reinforcement. The nano-hybrid coatings were cured by aromatic and aliphatic curing agents. The effect of the ZnO-APTES and curing agents on the corrosion and fouling resistant properties...
The problem of higher electricity consumption and lower exergy efficiency in the submerged arc furnace process of the silicon industry needs to be urgently solved. However, various raw materials play important roles in the electricity consumption and exergy efficiency of a submerged arc furnace during silicon production. An artificial neural network (ANN) method was used to model the final strain...
New glasses based on wastes of limestone, phosphate, and cement kiln dust besides white sand were manufactured. The structure of the prepared glasses was studied by FTIR, thermal analysis, UV spectroscopy and ultrasonic techniques. The analysis revealed that increasing the content of SiO2 influences the concentrations of the structural units constituting the amorphous network. The values of the physical...
A photosensor was fabricated based on a lead sulfide (PbS)/porous silicon (Ps) heterojunction. An n-type Si(100) single crystal wafer was used to prepare the Ps using a photo-electrochemical etching method. A PbS nanocrystalline thin film was deposited onto the Ps substrate using a microwave-assisted chemical bath deposition (MA-CBD) technique. The current-voltage (I-V) characteristics of the fabricated...
Global warming mainly due to emissions of carbon dioxide (CO 2) and other greenhouse gases has initiated wide interest in the investigation of various land CO 2 sequestration mechanisms. As a long-term terrestrial carbon sequestration mechanism, phytolith carbon sequestration may play an important role in the global carbon cycle and climate change. This study investigated the distribution of phytoliths...
SiO2 nanoparticles are prepared via a simple solgel method to provide a basic understanding of the effect of different acids, acetic acid [CH3COOH], hydrochloric acid (HCl), sulfuric acid (H2SO4) and oleic acid [C18H34O2] and solvents dimethylformamide and formamide on the morphological and optical properties. The resulting SiO2 nanoparticle were characterized by photoluminescence spectrophotometry...
Studying the responses of phytoliths to warming is a new approach to interpret how grassland ecosystems respond to global change. We used an infrared radiator to simulate warming on Phragmites communis in the Songnen Grassland, China – three warming treatments and a control were used to study the relationships between phytolith size and temperature. Warming changed the size of different types of phytoliths...
The main purpose of this work is to demonstrate the possibility of diffusion process perfection during silicon solar cells manufacturing by CFD simulation. Presently, the major community of PV industries uses a p-type silicon solar cell as the starting material. In this work too, boron doped silicon wafers are considered to form solar cells. Likewise, phosphorus oxy-chloride (POCl3) is used as a precursor...
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