Materials Literature
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Mechanical and physical properties, such as tensile strength, elongation at break, modulus of elasticity, Shore D hardness, melt flow rate (MFR), and electrical and thermal conductivities of composites with high density polyethylene matrix reinforced with Al powders were investigated experimentally. Measurements of th…
Two-dimensional numerical computation of the structure-dependent spectral response in a 4H-SiC metal—semiconductor—metal ultraviolet photodetector with consideration of reflection and absorption on contact electrodes, , , , ,
The level of energy deposition on future inertial fusion energy (IFE) reactor first walls, particularly in direct-drive scenarios, makes the ultimate survivability of such wall materials a challenge. We investigate the survivability of three-dimensional (3-D) dendritic materials fabricated by chemical vapor deposition…
Atomic force microscopy (AFM) revealed the surface structures of nanodot arrays fabricated by selective etching of SiGe/Si films that have pure-edge dislocation networks at the SiGe–Si interface. By varying the etching time, it is possible to control the composition of the nanodot arrays, allowing either SiGe or Si na…
Two samples of vladimirite, one from Bou Azzer, Morocco, and the other from a new occurrence in Copiapo, Chile (designated as R100075 and R080001, respectively), were examined with an electron microprobe, single-crystal X-ray diffraction, and Raman spectroscopy. Our results show that vladimirite is monoclinic with spa…
The sintered Ca(1-x-y)Dy(x)CeyMnO3 bodies were a single phase with a perovskite structure without any impurity phases. The calculated crystallite sizes of the Ca(1-x-y)Dy(x)CeyMnO3 were in the range of 43.3 to 63.3 nm. The composition significantly affected their microstructural and thermoelectric characteristics. The…
Warp yarns undergo various types of complex stress during the weaving process; namely tensile, cyclic-extension, compression, bending and abrasion. The capacity of the yarns to withstand these stresses is termed as their weavability. The prediction of weavability is exploited to extract first-hand information about th…
In this contribution, an upgraded model for plasma-wall interaction in the AINA code is presented. The AINA code is a comprehensive hybrid code comprising a global balance plasma dynamics model and a radial and poloidal thermal analysis of in-vessel components. AINA is an evolution of the SAFALY code, which was initia…
Reducing exhaust emissions is one of the biggest challenges facing the automotive engineering community today. In order to comply with future more stringent emission standards, the air-fuel ratio control must be improved. Commonly used control concepts do not account for the oxygen storage ability of the three-way cat…
Low density polyethylene and linear low density polyethylene (LDPE/LLDPE (60wt.%/40wt.%))as basic materials, intumescent flame retardant ammonium polyphosphate (APP) was added into them to obtain fire retardant systems. The molding parameters, fire retardant properties, mechanical properties and processing properties…
Optical properties of chalcogenide vitreous semiconductors of composition Se 95 As 5 containing different amounts of rare-earth metal fluorides (EuF 3 ) are studied, and, on this basis, the fundamental parameters, such as the refractive index and extinction coefficient, are determined. The dependences of these paramet…
Nanosilica particles were dispersed into polymer diols by high pressure shearing homogenizer (HPSH), then polyurethane nanocomposites were prepared via in-situ polymerization of diphenylmethane diisocyanate (MDI) and polymer diols. FTIR analysis indicated that the -NCO groups of MDI had reacted with the hydroxy on the…
Low-voltage, aberration-corrected, High-Resolution Transmission Electron Microscopy (HRTEM) has proven to be an excellent tool for structure analysis of graphene films, which are typically one or a few atoms thick. Experimental observations of graphene films by HRTEM exhibit several challenges due to low contrast and…
Our ability to control and harness light is undergoing a revolution, one that exploits the special properties of metals and our ability to structure them on a subwavelength scale. The materials that enable such control involve plasmonic and metallic metamaterials, materials that provide challenges
The synthesis of various soft and hard magnetic ferrites and their use in microelectromechanical systems (MEMS) are presented in this paper. We investigate the feasibility of screen-printing process of ferrite magnetic nanoparticles produced by carbon combustion synthesis of oxides (CCSO). These ferrites can be used a…
Procedures for preparing nanomodified powder epoxy compounds with various concentrations of montmorillonite were examined. The dispersion of particles in the epoxy oligomers was studied by X-ray diffraction analysis and electron microscopy. The influence of the content of the modifiers on the physicomechanical propert…
Abstract Melting of chemically bonded solids has been explained recently by transitions of electrons in higher electron states. Such transitions are shown to cause decomposition of the crystals into many units or sub‐systems build‐up of one or few atoms that mix in the melt. Most chemical elements possess molar meltin…
A mathematical model of a solid oxide fuel cell is presented for investigation of the thermodynamic cycles of power plants. The model is one-dimensional in two directions: in the direction of fuel flow in the supply channel and perpendicular to the contact planes of the electrolyte and electrodes. Electrochemical reac…
This paper investigated the microstructural characterization and mechanical properties of Mg-Zr-Ca alloys prepared by hot-extrusion for potential use in biomedical applications. Mg-Zr-Ca alloys were fabricated by commercial pure Mg (99.9%), Ca (99.9%), and master Mg-33% Zr alloy (mass%). The microstructural characteri…
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