Materials Literature
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The research was aimed at developing new reinforcement materials by using of different coating materials, included zinc, tin and lead. The experimental works included examination of coating defect, coating Adhesion study, and the adhesion between concrete and coated bars, and different techniques are employed to asses…
Alumina (Al2O3) thin films have been deposited on silicon substrates by atomic layer deposition at 200°C using TMA as Al precursor and H2O or O3as oxygen precursor. The growth rate has been found to be lower for ozone-based processes as compared to H2O. The electrical characterization of the deposited layers has shown…
With a strain induced martensitic transformation, transformation induced plasticity (TRIP) steel is expected to show an excellent impact energy absorption characteristic. It is important for an improvement of a reliability of the TRIP steel to evaluate an amount of martensite which can control such good performance of…
This study presents the design, simulation and fabrication of an innovative transparent micro-thermoelectric generator (µ-TEG) for solar energy conversion applications. BY using the surface micromachining technology of microelectromechanical systems (MEMS) technology, a transparent µ-TEG with suspending bridge-type po…
The properties of needled fabrics depend on the nature of component fibers and the manner in which fibers are arranged in the structure. Fiber properties along with the various machine and web parameters contribute to the structure that emerges from the needling operation. In this paper, the effect of machine paramete…
Abstract Bariopharmacoalumite, ideally Ba0.5Al4(AsO4)3(OH)4·4H2O, is a new mineral from Cap Garonne, France. It occurs in several places within the mine as colourless to pale yellow interpenetrating cubes up to 0.5 mm across. Bariopharmacoalumite is transparent to translucent, with a white streak, has an adamantine lu…
Problem statement: This study presents result of outdoor absorbed dose rate and estimated effective dose from the naturally occurring radionuclides 232 Th and 238 U series 40 K, around a Nuclear Research Reactor at the Centre for Energy Research and Training (CERT), Zaria, Nigeria. Approach: A high-resolution in situ…
Based on the existing experimental data of cyclic deformation for copper single crystal, a face centred cubic crystal, a new cyclic constitutive model was developed in the framework of single crystal viscoplasticity. In the developed model, a combined nonlinear kinematic hardening model was introduced and the remarkab…
The main target of this paper is optimizing the slot-opening shift for cogging torque reduction in BLDC motors. In a slot-opening shift method there is no skew, therefore the known drawbacks of the skewing is prevented. In the first part of the paper the slot-opening shift method for a BLDC motor is discussed. In this…
Abstract Proteinaceous microspheres have a wide range of biomedical applications, including their use as drug delivery systems. On the other hand, bioactive and antimicrobial textiles are promising substrates for medical care, in particular, as wound‐dressings. This work relates the development of a new process for th…
The relevance between electrical properties of CoFeB/MgO/CoFeB magnetic tunnel junctions (MTJs) and the crystalline orientation of MgO layer was investigated within a large-scale substrate. The tunnel magnetoresistance characteristics and the resistance-area product in CoFeB/MgO/CoFeB MTJs are degraded by deterioratio…
A novel study to characterise electric arc furnace (EAF) slags in the production of duplex stainless steel at the process temperatures was performed. The investigation is focused on determining the microstructural evolution of the EAF slag during and at the end of the refining period. In this regard, slag sampling was…
1,3-dichloro-2-propanol-blocked isocyanates based on diisocyanates such as 4,4′-methylene bis(phenyl isocyanate), and 1,6-diisocyanato hexane were prepared. Catalysis of cure reaction between blocked diisocyanates and hydroxy 1-terminated polybutadiene was investigated. Several tertiary amine and organotin catalysts w…
Removal of 2-chlorophenol from water using rice-straw derived ash (RSDA) was evaluated in this study to compare with commercial activated carbon. RSDA was obtained by burning rice-straw at 400 °C and 700 °C for 1 h. This ash can provide a better adsorbent for 2-chlorophenol. The adsorption capacities of RSDA at 400 °C…
We consider one possible approach to the problem of describing the dependence of material plastic strain characteristics on the stress hydrostatic component arising in many porous, fractured, and other inhomogeneous materials. The plastic strain of the media under study is investigated under the plasticity assumption…
The effect of electron-phonon (e-ph) interaction on the conductance of carbon chains is investigated by a non-equilibrium Green's function technique combined with a four-orbitals-per-atom tight-binding Hamiltonian. The optimized structure of the chain is found to be the semiconducting polyyne type (···-C≡C-C≡C-···). O…
The results of experimental investigation of the stability boundary for a spatially homogeneous state of a discharge in the planar gap of a “semiconductor-gas-discharge” cryogenic system filled with nitrogen are considered. The semiconductor cathode was prepared from single-crystalline silicon doped with a deep-lying…
This paper presents the results of an investigation of the impact of laser-induced shock on basalt samples in a water confinement regime. In order to observe the effect of laser shock-wave propagation, in this material, the rear free surface velocity is measured by a velocimetry interferometer system for any reflector…
Abstract 0.144(K 0.5 Bi 0.5 )TiO 3 ‐0.85(Na 0.5 Bi 0.5 )TiO 3 ‐0.006BaTiO 3 (KBT‐NBT‐BT) lead‐free piezoelectric ceramics were prepared using a conventional solid state method. The influence of Sb 2 O 3 doping on the crystal phase, surface microstructure and properties of the KBT‐NBT‐BT lead‐free piezoelectric ceramic…
Titanium-vanadium-chromium alloys are promising materials for hydrogen storage. They can absorb up to 3.8 wt % of hydrogen with a variable (depending on the composition) temperature of hydrogen release in a convenient range. This paper reports on the results of investigations of the TiV0.80Cr1.20H5.29 hydride by conti…