Materials Literature
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The thermoelectric compound TiS 2 is studied by using the full-potential linearized augmented plane-wave method on the density functional theory with the generalized gradient approximation (GGA) as well as the on-site Coulomb interaction correction (+ U ). The Seebeck coefficient of TiS 2 is calculated based on the el…
Abstract The Chinese philosopher Lao Tzu wrote that “a journey of a thousand li begins with a single step”. † My first step on the road to ultrafine-grained materials occurred on 5 May, 1989, when I boarded a plane in Los Angeles on the way to Ufa via Copenhagen and Moscow. This review provides a very brief summary of…
This work shows that a set of quality indicators (QI), able to reliably monitor the basic characteristics of carbon nanotubes (CNT) grown by of Fe-catalysed chemical vapour deposition (CVD), can be derived from Raman spectroscopy (RS) measurements. Multi-walled nanotubes, prepared at 750 °C in C 2 H 6 +H 2 mixture ove…
In the present work, we studied the electrodeposition of zinc oxide sulfide films onto monocrystalline n-InP(1̄1̄1̄) and (100) substrates starting from the combined reduction of thiourea, as a sulfide ion source, and molecular oxygen in the presence of zinc ions using DMSO as the solvent. The possible reactions involv…
The study is a first attempt to prepare bulk NiTi/NiTi shape memory alloy (SMA) laminates with a macroscopic heterogeneous composition by explosive welding and investigate their microstructures and martensitic transformation behaviors. After explosive welding, a perfect interfacial bonding between the two components a…
Dynamic strain induced transformation (DSIT) is an interesting processing route to obtain ultrafine ferrite grains. In the present work, the effect of Nb on DSIT was investigated. Samples of low C–Mn steels, with and without Nb, were intensively deformed in hot torsion, aiming at the production of ultrafine ferrite gr…
The growth of thin boron nitride (BN) films on graphitized 6H–SiC substrates was investigated in an attempt to reduce the large lattice mismatch between 6H–SiC and BN, which would improve the three-dimensional ordering in BN thin films grown by metalorganic vapor phase epitaxy (MOVPE). BN thin films were grown by low-…
The temperature dependence of the absorption spectra and magnetic circular dichroism due to f-f transitions from the 6 H 15/2 to 6 F 5/2 and 6(F 7/2 + H 5/2) states in the Dy3+ ion in (Dy2O3-P2O5-SiO2-GeO2) and (Dy2O3-La2O3-Al2O3-B2O3-SiO2-GeO2) glasses and the temperature dependence of the Faraday effect were studied…
Aligned Si 3 N 4 microstructures were achieved by seeding, extruding, and laminating methods. The degree of grain alignment was determined by microstructural measurements. Mechanical properties, including toughness, strength, hardness, and elastic modulus, as well as the contact damage response, were addressed and dis…
Low frictional, textured diamond-like carbon (DLC) films were deposited onto silicone [SiO(CH 3 ) 2 ]n] rubber by femtosecond laser ablation of frozen pentanel (C 5 H 11 OH). Deposition rate of the films for silicone rubber was higher than that for Si wafer. A broad Raman peak centred at 1530 cm −1 was measured from t…
In this article, we first review recent work on the basic science of the mechanisms of irradiation-induced defect production and migration in carbon nanotubes. We then discuss a few ways in which understanding of the irradiation effects can be used to modify the properties of single nanotubes as well as macroscopic ma…
Plasma processes have revealed to be, in the last decades, among the more powerful tools utilized for surface modification of polymers intended to be used in the biomedical field. In particular, two main plasma processes have been widely used: the deposition of thin films and the grafting of functional groups (plasma…
The successful dispersion of cellulose fibers of submicrometer diameter in polymers has been restricted to solution-cast films so far. In this work, the dispersion of microfibers in biopolymers was investigated by melt-mixing using conventional processing equipment. Thermoplastic starch and a blend of starch and polyl…
Every laundry is determined to maintain or constantly improve the quality of its services. This quality is defined by parameters that are determined by standard methods. With the help of different industrial laundries some research on the influence of laundering procedure on the quality of laundered fabrics was conduc…
Three dimethylaminosilanes, characterized by a different number of NMe2 groups bonded to silicon, have been compared as precursors in silicon nitride-like films plasma enhanced chemical vapour deposition (PECVD). The effect of input power on the chemical characteristics of the coatings has been studied by means of FT…
A novel high-speed tensile test instrument is described, capable of measuring the mechanical response of elastomers at strain rates ranging from 10 to 1600 s(-1) for strains through failure. The device employs a drop weight that engages levers to stretch a sample on a horizontal track. To improve dynamic equilibrium,…
By employing the first-principles pseudopotential plane-wave method, the physical properties of zincblende ZnO are investigated in comparison with those of the common wurtzite structure. Zincblende ZnO is predicted to be a direct gap semiconductor. Compared to the wurtzite structure, the zincblende ZnO is characterize…
Luminescence properties of the complexes of terbium(III) with nonsteroidal anti-inflammatory drugs (ibuprofen and orthofen) were studied. It was demonstrated that in the presence of organic bases (2,2’-dipyridyl and 1,10-phenanthroline) mixed-ligand complexes are formed and the luminescence intensity of terbium(III) i…
In this paper, the modeling of force sensors built with rare-earth iron giant magnetostrictive materials is studied. For such a purpose, a magneto-mechanical strongly coupled FE model is proposed. Using the proposed model, the input-output characteristic of a force sensor built with giant magnetostrictive material (Tb…
Abstract Samples of pure Cu and Cu with 0.17 wt.% Zr were processed by equal-channel angular pressing up to 12 passes with a 90° die angle using route B c . Microstructure evolution after deformation and subsequent heat treatment of this severely deformed material was investigated. The deformed and annealed states wer…