Materials Literature
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In this paper MIS (Metal-Insulator Ta 2 O 5 capacitor has been studied in terms of dielectric relaxation with a low frequency dielectric spectroscopy. The results acquired for Ta 2 O 5 show a relaxation peak in the temperature and frequency range available, 187 K -385 K, 1 Hz
The AZ91D magnesium alloy containing rare earth Gd was prepared in this study, and the effect of semi-solid isothermal heat treatment on the microstructure of the alloy was investigated to obtain an optimum semi-solid structure. Results show that Gd can refine the microstructure of AZ91D magnesium alloy, and the optim…
Conventional beam house operations adopted by the global tanning industry are coming under the close scrutiny of the environmentalists on account of the possible adverse effect on human health and environment. Lime, which is used to the tune of about 10% on the weight of the raw hides and skins, in re-liming stage con…
Polyoxometalates (POMs) have been studied for ca. 200 years since the first report on the synthesis of (NH4)3PMo12O40 in 1826. Even now, novel POMs are still being prepared, characterized and applied to various fields. Multi-step, multi-electron transfers reversibly occur for many redox active POMs, which is interesti…
Biodiesel use and production has significantly increased in the United States and in other parts of the world in the past decade. This change is driven by energy security and global climate legislation mandating reductions in the use of petroleum-based diesel. Recent air quality research has shown that emission of som…
This paper presents a manufacturing method, properties and possible use of copper matrix composites reinforced with particles of volcanic tuff. The composites were obtained by powder metallurgy and reinforced with Filipowice tuff mined near Cracow, Poland. The influence of tuff particles content on the properties of t…
A quantitative understanding of the residual stress distribution within a HIPPED target plate of tungsten clad in tantalum for the ISIS Target Station 1 (TS1) was deemed to be essential. The Engin-X instrument of the ISIS facility was therefore employed as it has the capability to carry out a non-destructive experimen…
The effects of postharvest application of chitosan and carbon monoxide (CO) on fruit browning and softening during cold storage (8 ℃) were evaluated. CO (10 μmol/L) significantly delayed the internal browning of peach fruit, and the effect was enhanced in combination with chitosan (1%, w/w). Further studies showed tha…
For the production of composite materials WC-6Co, the spark plasma sintering method was used. As a result of rapid heating and a short sintering time, materials were obtained with a density close to the theoretical value. The resulting sintered materials were measured for density and hardness. The values of the critic…
Biocomposites have been developed to address the sustainability issues of nonrenewableresource based materials. These composites are often produced by reinforcing natural fibres in petroleum based ...
Microfibrillar composites (MFCs) from petrochemical-derived polymers have been investigated for several years and the technique can result in significant improvements in mechanical properties when compared with the neat matrix material of the respective composite. The current work applies the technique to biodegradabl…
For the development of an intermediate radioactive waste repository, two different types of reinforced concrete were analyzed in terms of durability: one made with ordinary portland cement and the other one made with pozzolanic cement. The values for compressive strength, sorptivity and air permeability demonstrate th…
Spent aluminum-clad fuel elements from Argentine experimental nuclear reactors, manufactured with AA6061 aluminum alloy, are submitted to interim storage in demineralized water basins. In order to characterize the oxides grown during the storage, immersion tests of AA6061 samples were performed for periods from 3 days…
The electronic structure and hydrogen storage capability of Yttrium-doped BNNTs has been theoretically investigated using first principles density functional theory (DFT). Yttrium atom prefers the hollow site in the center of the hexagonal ring with a binding energy of 0.8048eV. Decorating by Y makes the system half-m…
Composites of linear-low density polyethylene (LLDPE) with multi-walled carbon nanotubes (MWCNT) and thermally reduced graphene (TRGO) were produced by melt compounding. The composites were compatibilized by grafting aromatic pyridine groups onto the LLDPE backbone. The aromatic moieties established non-covalent π-π i…
Mechanical recycling of polymeric materials is a favorable technique resulting in economic and environmental benefits, especially in the case of polymers with a high production volume as the polypropylene copolymer (PP). However, recycling by reprocessing techniques can lead to thermal, mechanical or thermo-oxidative…
The generation of neutrons through nuclear reactions like Be(d,n), necessary to implement Accelerator-Based Boron Neutron Capture Therapy (AB-BNCT), requires stable Be deposits on an adequate substrate. In this paper, first results of beryllium deposits on Mo, W and Cu substrates are shown. In order to achieve the adh…
Proton exchange membrane fuel cells (PEMFCs) run on pure hydrogen and oxygen (or air), producing electricity, water, and some heat. This makes PEMFC an attractive option for clean power generation. PEMFCs also operate at low temperature which makes them quick to start up and easy to handle. PEMFCs have several importa…
The antimicrobial activity of silver nanoparticles makes this chemical element attractive for their incorporation in different materials. Additionally, heteropolyacids (HPAs) have advantages as catalysts which make them environmentally very interesting. The objective of this work is to incorporate in a silica matrix o…
A solution growth approach for zinc oxide (ZnO) nanowires is highly appealing because of the low growth temperature and possibility for large area synthesis. In our work, ZnO nanowires were obtained from thin films prepared on silica glass, Si (100) and Si (111) from a single and five layers spin-coating deposition of…