Materials Literature
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Polyethylene (PE) is widely used to make bulk containers in rotational molding process. The challenge in this study is to improve permeation resistance of PE to hydrocarbon solvents and gases. Adding organomodified clay improves the thermal, barrier and mechanical properties of PE. In fact, clay layers create a tortuo…
We have studied an Fe-15Mn-5Si-9Cr-5Ni (wt.%) shape memory alloy produced by casting in sand moulds. After processing by rolling at 800° C followed by annealing at 650° C, the structure contains a high density of stacking faults and high strength austenite. When a stress is applied to the material, a reversible marten…
It was aimed to investigate the effect of carbon black and/or elastomer on the electrical conductivity and mechanical properties of thermoplastic elastomer (TPE). Carbon black (CB) and ethylene-glycidyl methacrylate (E-GMA) were used as additives in the main matrix. The blends and composites were characterized in term…
Reducing vehicle weight and emissions by lightweight design is a major goal of the automotive industry. Magnesium as the lightest structural metal bears a significant weight saving potential compared to steels and aluminum. Cast magnesium components are widely used e.g. as engine blocks or gear box houses. The applica…
PURPOSE: After cranioplasty with a titanium mesh, radiofrequency (RF)-shielding images appear during magnetic resonance (MR) imaging. To clarify their influence, we evaluated the effect of mesh position, phase-encoding direction, and type of coil employed. MATERIALS AND METHODS: On a 1.5-tesla MR imager, we placed a t…
In this work, powders of Cu and Al were milled with a proportion equal to 24% atomic Al, using low and medium energy mills. The initial, intermediate and final stages of the resulting powder are analyzed using scanning electron microscopy, X-ray diffraction and different transmission electron microscopy techniques. Th…
In most cases high cutting speed is used when cutting wood by circular saw. This results in oscillating of circular saw blade, which may lead to destroying the tool, machine or hurting the operator. The aim of this paper is to show that it is possible to apply any of the methods used in the research as an equivalent m…
Polymer composites by and large found suitable for many specific applications in the field of electrical, electronics, marine, aerospace and microelectronics. Thus a new technique for processing polymer composites has been explored and one such is microwave curing. The roles of microwave in the post curing of polymer…
En: EmásF : Revista Digital de Educación Física. ISSN. 1989-8304 n. 34 (2015), pp. 26-41
This study empirically examines the impact of the sovereign debt crisis on three Central and Eastern European emerging stock markets (the Czech Republic, Hungary, and Poland will be referred as three CEE). Particular attention is given to volatility transmission and conditional correlation changes in the aftermath of…
The anodic dissolution of API X70 pipeline grade steel was investigated after different exposure periods of time and different temperatures in 1.0 M H2SO4 pickling solutions using optical microscopy, electrochemical impedance spectroscopy (EIS), and potentiodynamic polarization measurements. The EIS and polarization m…
In this study, we compared the electrochemical corrosion behavior of a newly fabricated nanocrystalline pure aluminum to another microcrystalline aluminum using various electrochemical techniques in natural Arabian Gulf seawater. The nanocrystalline Al was fabricated using mechanical alloying technique. Cyclic potenti…
The effects of Cu content and temperature on the hydrogen storage properties, including gaseous phase hydrogen storage and electrochemical performances were investigated, and the improved low-temperature properties of Cu-dopped LaNi4.1−xCo0.6Mn0.3Cux (x= 0-0.45) alloys at 238K were intensively discussed. Cu prefers to…
The hydrogenated amorphous silicon (a-Si:H) based p–i–n diode structures Al/a-Si:H(p+)/a-Si:H(i)/(silicides NPs/a-Si)x/a-Si:H(i)/a-Si:H(n+)/ITO/glass with multiple layers (x = 8,…,15) of the embedded narrow band semiconducting nanoparticle silicide (CrSi2, Mg2Si, and Ca2Si) multistructures have been grown by combining…
The Ba5SiO4Cl6: Yb3+, Er3+, Li+ phosphor has been prepared by high temperature solid state reaction, and their upconversion (UC) luminescence properties and mechanisms are investigated. The UC emission bands located at 525 nm (2H11/24I15/2), 548 nm (4S3/24I15/2), and 662 nm (4F9/24I15/2) due to Er3+ are observed under…
A diffractive aspheric lens with minimized geometric aberrations on the axis (the axilens) is designed. It is shown that the lens possesses substantially higher angular resolution than a parabolic lens. We consider the spectral properties of the axilens. Experiments on imaging by means of an axilens are conducted.
Рассмотрены и проанализированы виды сырья и способы производства лигатуры алюминий–бор, такие как: прямое сплавление алюминия с чистым бором или боридами; алюмотермическое восстановление борсодержащих, кислородсодержащих и бескислородных соединений; внепечное получение чистых боридов с последующим растворением их в ал…
Two-dimensional layered WS 2 sheets is used as the hole extraction layer (HEL) in organic solar cells (OSCs). We find that UV-ozone treatment of the chemically exfoliated WS 2 sheets can significantly improve the device performance of the OSCs with the power conversion efficiency (PCE) of about 8.37%, which is compara…
Electrophoresis 2015, 36, 62–75. DOI: 10.1002/elps.201400316 Prof. Hanfa Zou and coworkers have reviewed the recent progress and development of preparation approaches of hybrid monoliths, mainly covering the literature since July of 2012. First, the direct synthesis approach of hybrid monoliths via sol-gel chemistry a…
We focus the discussion of this review in the description and operating principles of organic and hybrid (dye-sensitized) solar cells, and go through the factors of importance in the research towards the optimization of the devices, as well as the state-of-the-art in both fields.