Materials Literature
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In some cryogenic process measurement applications, for example, in hydrogen technology and in high temperature superconductor based generators, there is a need of robust temperature sensors. These sensors should be able to measure the large temperature range of 20 - 500 K with reasonable resolution and accuracy. Thin…
A modified Discrete Element Method incorporating force models for calculating van der Waals forces, electrostatic repulsion forces, hydrodynamic lubrication forces, magnetic dipole–dipole interactions and Brownian effects was applied towards the study of shear aggregation of non-magnetic and magnetic colloidal nanopar…
Nonlinear optical crystals of pure, 10 and 50 mol% glycine mixed L-valinium picrate have been grown from saturated aqueous solution by slow evaporation method at a temperature of 36℃ using a constant temperature bath of accuracy of ±0.01℃. The synthesized organic optical material has been purified by repeated recrysta…
This study experimentally and numerically investigated the damage extension of a brittle monolithic silicon carbide plate in response to the high speed impact of a projectile. An out-of-plane impact of a silicon nitride sphere with a velocity of 50 to 600 m/s induced multiple ring cracks on the contact surface. A crat…
The purpose of this study is to increase the dispersibility of vapor grown carbon fiber (VGCF) filler in a polypropylene (PP) matrices. PP/VGCF composites were fabricated by a twin screw extruder. The effect of content, surface modification on the thermal conductivity, the electrical properties, and the mechanical pro…
Initial study on nano composite polymer electrolyte of PVdF-HFP/MG49-ZrO2 has been done. The zirconium was synthesis via in-situ sol-gel method in a dissolved polymer blends. The effects of different concentrations of zirconium and pH values have been investigated on nano composite polymer (NCP). Analysis impedance sh…
The purpose of this project is to explore the adsorption rates of different dye methods (direct, reactive, acidic, disperse, azo dyes) in three shapes of chitosan materials (film, microsphere, and scaffold) which were formed by 88% deacetylation degree of chitosan. Results of this research suggest that the samples wit…
Novel platinum nanobelts were synthesized using a reverse micelle method for the first time. Morphology control over the shape and size of the nanobelts can be achieved simply by changing the precursor concentration or reaction time.
The electric and photoelectric properties of gallium-arsenide films deposited on a polycrystalline corundum substrate from the ablation plasma formed by a high-power ion beam are investigated. It is ascertained that vacuum and air annealing (in the former case, P = 10 −2 Pa and T = 300–1200 K) and sulfide chemical pas…
This work presents a study of Dissolved Gas Analysis in samples of mineral insulating oil, corrosive or suspicious corrosive according to the test ASTM D1275B. The results showed that the change of the properties of the attacked surfaces causes a malfunction in the transformer. It seems from the results that the DGA s…
Electrospinning is a simple technique that has gained much attention because of its capability and feasibility in the fabrication of large quantities of fibers from polymer with diameters ranging in nano-microscale. These fibers provided high surface area to volume ratios, and it was of considerable interest for many…
On many-core Network-on-Chips (NoCs), communication is on the critical path of system performance and contended synchronization requests may cause large performance penalty. Different from conventional algorithm-based approaches, the paper addresses the barrier synchronization problem from the angle of optimizing its…
The development of very high resolution FT-ICR mass spectrometers (Marshall et al, 1998) has made a wide range of new measurements possible and by combining this new technology with laser vaporization supersonic beam methods of producing carbon species (chains, rings and fullerenes), new advances in understanding of t…
A neutronic performance of small long-life Pressurized Water Reactor (PWR) using thorium cycle based fuel has been investigated. Thorium cycle which has higer conversion ratio in thermal region compared to uranium cycle produce some significant of 233U during burn up time. The cell-burn up calculations were performed…
A novel dinuclear complex [Co2(atr)3(mal)2(H2O)2]·4H2O(1) (atr = 4-amino-1,2,4-triazole and mal = malonic acid) containing mixed N and O-donor atoms has been prepared and structurally characterized. The structure is made up of the symmetrically 1, 2, 4-triazole bridged [Co2(atr)3(mal)2(H2O)2] moiety and four lattice w…
The chemisorptions of H2 on fullerenes C60 and C80, endofullerene Sc3C@C80 and solid C60 were comparatively studied. A chain reaction mechanism for dissociative adsorption of H2 on solid C60 is proposed under high pressure. The breaking of H–H bond is concerted with the formation of two C–H bonds on two adjacent C60 i…
The structures of the (CdS)42, (CdSe)42, Cd42Se32S10, Cd42Se22S20, and Cd42Se10S32 clusters have been determined using the simulated annealing method. Factors influencing the band gap value have been analysed. We show that the gap is most significantly reduced when strongly under coordinated atoms are present on the s…
Medical polymers require sterilization and must be able to maintain material properties for a specified shelf life. Sterilization can be achieved by using gamma or e-beam exposure. In this study, accelerated aging tests of poly(ether-block-amide) (PEBA) copolymer samples is presented. PEBA copolymer samples with diffe…
Resistive switching (RS) effects in Pt/HfO2/TiN metal-insulator-metal (MIM) capacitors have been investigated in dependence on the TiN bottom electrode engineering, deposition process, switching conditions and dielectric thickness. It is found that RS ratio depends strongly on the amount of oxygen introduced on TiN su…
The effect of material composition distribution on the electro-thermal response of a thin, non-uniform functionally graded metal (FGM) line is investigated under a direct current field. The distribution of material composition along the FGM line is expressed in terms of a general power-law function of space variable,…