Materials Literature
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When charged particles impact the surface of a solid material, they can be backscattered from that surface or cause secondary electrons to be emitted. The ratio of the number of emitted electrons (secondary and backscattered) to the incident electrons number is known as the total electron emission yield. Knowledge of…
Changes in the magnetization projection on the axis of wire specimens of low-carbon CΤ1ΚΠ steel during their magnetization reversal by a circular field were experimentally determined as a function of the polarizing-field value in a solenoid. Measurements were performed on annealed and plastically tension-deformed spec…
AISI 316Ti is Cr-Ni-Mo austenitic stainless steel stabilized by Ti, recommended for construction of various industrial and medicine devices. In spite of its high Pitting Equivalent Resistance Number (PREN=23.688) it underlies local corrosion namely pitting in aggressive chloride environment. Appearance and extent of A…
Experimental studies on partial discharges (PD) occurred in oil-insulated devices using ultra-high frequency (UHF) sensors to detect PD signals and using wavelet analysis to process the acquired UHF signals are presented, and a threshold selecting method adapting to various noise circumstances when de-noising UHF sign…
Two molecular triads with an oligotriarylamine multielectron donor were synthesized and investigated with a view to obtaining charge-separated states in which the oligotriarylamine is oxidized 2-fold. Such photoinduced accumulation of multiple redox equivalents is of interest for artificial photosynthesis. The first t…
Shape memory alloys possess several features that make them interesting for industrial applications. However, due to their complex and thermo-mechanically coupled behavior, direct use of shape memory alloys in engineering construction is problematic. There is thus a demand for tools to achieve realistic, predictive si…
The surface silanization was carried out on ultrasonic micro-arc oxidation (UMAO) coatings on pure magnesium using KH550 as silane coupling agent (SCA). The surface morphology, chemical bonds and corrosion resistance of the silane films were investigated by scanning electron microscope (SEM), Fourier transform infrare…
It is highly desirable to replace gas barriers of aluminium and non-renewable plastics in order to lower our ecological footprint. One interesting candidate is films made from cellulose nanofibrils (CNFs), which after cross-linking have been shown to have competitive barrier properties even at a high relative humidity…
A low-carbon triple-alloyed steel was processed by high-pressure torsion at room temperature for up to 5 turns under a pressure of 6.0 GPa. Microhardness, scanning electron microscopy and X-ray diffraction were used to investigate the hardness and microstructural evolution of the steel. Values of the Vickers microhard…
Supported anodized alumina template films with highly ordered porosity are best suited for fabricating large area ordered nanostructures with tunable dimensions and aspect ratios. In this paper we first discuss important issues for the generation of such templates, including required properties of the Al/Ti/Au/Ti thin…
In this study the pseudo-potential method is used to investigate the structural, electronic, and thermodynamic properties of ZnO 1− x S x semiconductor materials. The results show that the electronic properties are found to be improved when calculated by using LDA + U functional as compared with local density approxim…
Motivated by adhesive proteins in mussels, strategies using dopamine to modified surface have become particularly attractive. In the present work, we developed a novel and convenient method to modify the biodegradable Fe plates with heparin. Iron was first treated by a facile one-step pH-induced polymerization of dopa…
In this paper, we present a tool for visualizing multi-factor changes in HTV silicone rubber using results from ATR-FTIR, color coordinates, contact angle, and voltage breakdown test. Experimental works were performed on samples collected from a 22 KV silicone rubber insulator. The specimens were subjected to accelera…
Block copolymers (BCP) are highly promising self-assembling precursors for scalable nanolithography. Very regular BCP nanopatterns can be used as on-chip etch masks. The first step in the processing of BCP thin films is usually the chemical modification of the substrate surface, typically by grafting of a brush layer…
Sintering parameters are undoubtedly among the many factors that influence the mechanical properties and hydrothermal ageing resistance of tetragonal zirconia ceramics. In this research, the effect of using short holding times i.e. (1 min., 30 min. and 1 hour) as compared to the conventional 2 hours during sintering o…
Amorphous and nanocrystalline alloys show attractive magnetic properties, and can be the excellent choice to develop the cores of high-frequency high-power transformers used in high-power density renewable power generation systems. However, the electromagnetic design of high-frequency power transformers is a multi-phy…
We present the role of photogenerated charge carriers in the oxidation of CO by O 2 on reduced, rutile TiO 2 (110) based on first-principles DFT calculations. Our calculations show that hole-trapped O 2 at the O vacancy site adopts a tilted open ring configuration, while an additional electron preferentially localizes…
The electronic properties and Seebeck coefficients of Ce3Te4 and La3Te4 are computed using Density Functional Theory with on-site Coulomb interaction correction. We found that the Seebeck coefficients of Ce3Te4 and La3Te4 are almost equal at temperatures larger than the Curie temperature of Ce3Te4, and in good agreeme…
Yttrium Copper Titanate ( Y 2/3 Cu 3 Ti 4 O 12) nanoceramic is structurally analogous to CaCu 3 Ti 4 O 12 (CCTO). X-ray diffraction (XRD) of Y 2/3 Cu 3 Ti 4 O 12 (YCTO) shows the presence of all normal peaks of CCTO. SEM micrograph exhibits the presence of bimodal grains of size ranging from 1–2 μm. Bright field TEM i…
Phase transformations between amorphous and crystalline states induced by irradiation of pulsed laser deposition grown GeTe thin films with nanosecond laser pulses at 248 nm and pulse duration of 20 ns are studied. Structural and optical properties of the Ge-Te phase-change films were studied by X-ray diffraction and…