Materials Literature
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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…
Ca 0.997 Pr 0.002 TiO 3 thin films that show strong red luminescence were successfully prepared by an excimer laser assisted metal organic deposition (ELAMOD) process at temperatures from 25 to 400 °C. Laser irradiation induced an oxygen deficiency in the film. Oxygen annealing at 500 °C eliminated the oxygen vacancy…
Magnesium alloys containing lithium over 10 mass-% have good cold workability and high specific strength. However, the poor corrosion resistance of these alloys hinders their application. In this experiment, the effect on corrosion resistance of plasma thermal sprayed pure aluminum coating to Mg-Li alloy plates was in…
A nano‐Si 3 N 4 /5 wt% nano‐C composite was successfully fabricated for the first time via high‐energy ball milling, followed by spark plasma sintering. The milling promoted the amorphization of the starting powders; most of the carbon particles were transformed into nano‐size and embedded in the amorphous phase. This…
Mn‐doped zinc orthosilicate (Zn 2 SiO 4 )‐bearing phosphor microparticles were synthesized with controlled three‐dimensional (3‐D) morphologies inherited from the microshells (frustules) of diatoms (unicellular algae). Silica‐based diatom frustules were first coated with manganese and zinc oxide nanoparticles by expos…
We consider a liquid meniscus inside a wedge of included angle 2β that wets the solid walls with a contact angle θ. The meniscus has a convex interface that satisfies π∕2<θ+β<π. The capillary pressure gradient due to a small disturbance of the location of the contact line moves fluid from a neck region t…
The paper presents the results of the study on the influence of insulator profile on the aging performance of silicone rubber (SIR) insulators in salt-fog. Experiments have been conducted on various two-shed arrangements at 35 V/mm average stress and 0.25 S/m salt-fog conductivity level. The work is also extended to i…