Materials Literature
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Nowadays, hydrogen is recognized as a clean fuel with the potential to meet future energy demand and the capability of diminishing reliance on fossil fuels. In the current work, a novel configuration for heavy paraffin dehydrogenation named as radial-flow membrane reactor (RF-MR) is proposed that combines a membrane c…
The relaxation properties of single layer graphene sheet on the SiO2 substrate are investigated through molecular dynamics simulation technique in this article. The graphene sheet models with different aspect ratios on SiO2 substrate are established and sufficiently relaxed at different thermodynamic temperatures. Sub…
This paper describes a modified dielectric breakdown model (mDBM), to predict breakdown pathways in polymer films taking into consideration trapped charge and gaseous voids. Modeling components include: (1) accurate boundary integral equation method (BIEM) based on Green function formulations for grid-less, non-orthog…
The behavior of a poly(ethylene glycol)-based nanocomposite shear thickening fluid (STF) under impact loading conditions has been experimentally studied using the Kolsky method and related techniques. The dependence of the pressure in the STF on the volume strain magnitude has been determined. It is established that t…
New biodegradable Fe-Zn alloys with different concentration of zinc were prepared by electroforming in this paper. The composition, phase and microstructure of the Fe-Zn alloys were investigated by EDX, XRD and SEM, respectively. The potentiodynamic polarization and static immersion test were used to evaluate the in v…
We investigate the effects of Cr, Ru and Sn substitution on electrical resistivity and magnetoresistance property of polycrystalline samples La 0.67 Sr 0.33 Mn 1-x B x O 3 (x = 0, 0.05; B= Ru, Cr and Sn) compounds. The value of M-I transition temperature (T P ) decreases while resistivity increases with Cr, Ru and Sn…
A composite is a material which is made up of two or more distinct materials. Composite materials are generally used for buildings, bridges and structures such as boat hulls, swimming pool panels, race car bodies, shower stalls, bathtubs, storage tanks, imitation granite and cultured marble sinks and counter tops. As…
This paper presents results of accelerated life tests having the purpose to single out the diagnostic characteristics of electrical and mechanical properties for XLPE low-voltage cables used in nuclear power plants. In this work, XLPE-insulated cables were aged under two different conditions, the first consisting in t…
Electric field screening caused by the proximity of individual field emitters in a field emitter array influences the current that can be obtained. This paper describes the image with four carbon fiber field emitters at a 500 μm separation in a linear configuration to isolate and quantify the effect of electric field…
Poly (lactic) acid (PLA)/poly (caprolactone) (PCL) blends nanofibers, with mean diameter about 600nm, were prepared by electrospinning. This research focused on the morphological and thermal properties of nanofibers made from PLA/PCL bends with different PCL content. The results showed that the addition of PCL could i…
. Theoretical distribution of a stress field in a sample in the form of a rectangular parallelepiped in compression for an isotropic material was calculated using the method of finite elements. Calculations showed that the highest stress is observed at the top and front edges of a sample. There are areas of the tensio…
The transpiration method was used to determine the volatility of titanium dioxide (TiO2) in water vapor-containing environments at temperatures between 1473 and 1673 K. Water contents ranged from 0 to 76 mole % in oxygen or argon carrier gases for 20 to 250 hr exposure times. Results indicate that oxygen is not a key…
Some perspective materials are characterized by shape memory effect and NiTi alloy belongs to their main representatives. NiTi is an approximately equiatomic alloy of nickel and titanium and it possesses interesting properties, such as superelasticity, pseudoplasticity and good corrosion resistance. Hence, it is used…
In this study, the dynamic behavior of the moving liquid column coalescing with a sessile droplet in a hydrophobic microchannel under pressure driven flow conditions is numerically investigated using coupled Volume of Fluid with Level Set (CLSVOF) interface tracking method implemented in ANSYS-Fluent 14.5 in conjuncti…
We have clarified that the primary and secondary streamers have a significant impact on breakdown mechanism in air. In this paper, we focused on the highly-conductive channel progress breakdown, and considered the initiation condition of highly-conductive channel from the viewpoint of the secondary streamer initiation…
A series of Fe 1− x Mn x Se polycrystalline samples with , 0.02, 0.05 and 0.08 is prepared by conventional solid-state reaction. Normal-state transport of electrical resistivity and thermopower are investigated up to 700 K. The electrical resistivity monotonically increases with increasing Mn content. The temperature…
Delayed hot water in domestic water heating systems is a worldwide problem. In New Zealand, it accounts to over a 15 million cubic meters of treated water wasted per year. There are few commercial solutions proposed to minimize the problem, but none of them are affordable or practically convenient. To increase the tem…
BACKGROUND: One area of nanoscience deals with nanoscopic interactions between nanostructured materials and biological systems. To elucidate the effects of the substrate surface morphology and viscoelasticity on cell proliferation, fractal analysis was performed on endothelial cells cultured on nanocomposite samples b…
One of challenge for cancer therapy is efficient delivery of anticancer agents into tumor sites to increase efficiency of drugs and reduce side effects. To overcome this challenge, we designed pH- sensitive doxorubicin prodrug (DEX-PEI-DOX) nanoparticles based on dextran-poly(ethylene imine) copolymers (DEX-PEI). The…
Abstract Hloušekite, (Ni,Co)Cu 4 (AsO 4 ) 2 (AsO 3 OH) 2 (H 2 O) 9 , is a new supergene arsenate mineral from the Geister vein (Rovnost mine), Jáchymov (St Joachimsthal), Western Bohemia, Czech Republic. It was found along with veselovský ite, pradetite, lavendulan, arsenolite, babánekite and gypsum on the surface of…