Materials Literature
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A small-diameter polymer composite tubing comprising polyethylene (PE) and poly(vinyl acetate) (PVAc) with a biocompatible surface was developed for application to medical devices. In this study, the following modification process was applied to the narrow PE tubing (inside diameter: 300 μm, outside diameter: 600 μm,…
Glass transition kinetics in glassy Se98In2 alloy is studied using differential scanning calorimetry under two different conditions. In the first condition, normal samples of the present glass are used. In the second condition, the ion-irradiated samples are used to see the effect of ionic irradiation on the glass tra…
We report experimental results for the spectral dependences of the optical absorption edge in (As 2 S 3 ) 100-x (SbSI) x (0 x 90) glasses. Our studies have shown that increasing of antimony sulfoiodide (SbSI) content in the glass composition and the temperature increase lead to shift in the absorption edge towards lon…
Carbon nanotubes are currently the focus of intense interest due to their extraordinary properties. However, asgrown nanotubes exist as bundles of metallic and semiconducting. This hinders their widespread applications. Much progress has been made to overcome this limitation. Many separation methods have been investig…
In this paper, we describe a new production method for microscale silicon carbide (SiC) ceramics parts. Slip casting with SU8 micro mold was carried out for the fabrication of a three-dimensional SiC MEMS component, which was made from polycarbosilane (PCS) precursor-derived SiC nano powder. SiC nano powder was mixed…
The present paper deals with the optimum shape design of an absolutely rigid impactor which penetrates into a semi-infinite concrete shield. The objective function to maximize is the depth of penetration (DOP for short) of the impactor; in the case of impactors with axisymmetric shapes DOP is calculated using formulas…
In this article mesoscopic continuum physics is reviewed using generalized coordinates in the context of liquid crystals. A special focus is put on the balance of spin (internal angular momentum). Mesoscopic continuum physics introduces variables describing the micro-structure – like the orientation of crystals – into…
The present study is focused on the correlation of scaling properties of crack branching and brittle fragmentation with damage accumulation and a change in the fracture mechanism. The experimental results obtained from the glass fragmentation tests indicate that the size distribution of fragments has a fractal charact…
The natural occurrence of graphite proves its geological stability over long time periods and therefore it could be considered as a matrix for embedding radioactive waste. However its porous structure affects the possible use of graphite as long term stable waste matrix for final disposal. Aqueous phases can penetrate…
Nanotechnology and nanomaterials have the potential to revolutionize existing and create entirely new industries. Unique physical, mechanical, chemical, and biological properties of nanomaterials have been extensively documented in the last two decades. However, most nanomaterials are discontinuous in nature, creating…
The principle of twoand three-layer transparent system antireflection is based on the method of Fabry–Perot multiple-beam interference spectrum envelopes and it is shown that the presence of half-wave and quarter-wave layer thicknesses or their combination is sufficient but not necessary for its achievement. The neces…
Within the framework of mode-coupling theory, the glass-transition scenario is investigated for a system of particles interacting with a hard-core repulsion and an additional square-shoulder soft core at larger distances. The static structure is calculated from the potential in Percus-Yevick approximation. For certain…
The article outlines the calculation methods for stabilizer bars. Modern technological and structural solutions in contemporary cars are reflected also in the construction and manufacturing of stabilizer bars. A proper construction and the selection of parameters influence the strength properties, the weight, durabili…
ZnO and ZnO thin films doped with different Mg contents （0.81at%,2.43at% and 4.05at%） were fabricated by radio frequency-magnetron sputtering （RF-MS） on glass substrates at 450 ℃. The microstructure, photoluminescence （PL）, optical and electrical properties were investigated. The results show that ZnO and diluted Mg d…
Abstract: In this study, the effects of yarn parameters, on the bursting strength of the plain knitted fabrics were examined with the help of artificial neural networks. In order to obtain yarns having different properties such as tenacity, elongation, unevenness, the yarns were produced from six different types of co…
A number of competing failure mechanisms are involved in bearing failure initiation. For well manufactured bearings operating under clean and well controlled running conditions, sub-surface initiated fatigue is the classical initiation form. Three mechanisms dominate the concept of subsurface induced initiation and gr…
By means of density functional theory on the basis of generalized gradient approximation, the equilibrium geometries and electronic properties of different hydrogenated diamond (100) surfaces were calculated. The results indicate that in the case of 2×1 reconstruction structure, the relaxation occurs along directions…
Carbon nitride (CNx) coating is one of the carbonaceous materials, which was reported to show superlow friction coefficient (μ<0.009) in Nitrogen environment. Therefore CNx coating is a promising material of solid lubricant for sliding interfaces to reduce friction. The superlow friction appeared after running in proc…
Thiolated polymers or so called thiomers are hydrop hilic macromolecules exhibiting free thiol groups on the polymeric backbone. These are generat ed by the immobilization of sulphydryl- bearing compounds on the backbone of well establish ed mucoadhesive polymeric excipents, such as chitosan and poly (acrylates). This…
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