Materials Literature
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We have investigated UV luminescence with a subnanosecond time resolution of Li 6 GdB 3 O 9 :Ce crystal fibers upon their ultrasoft X-ray selective excitation at 10 and 293 K in the range of 4 d → 4 f core transitions. We have revealed an intense fast-decaying subnanosecond luminescence component, which is caused by a…
For the production and development of Advanced High-Strength Steels adequate understanding of the formation mechanisms of the metallic microstructure is crucial. The superior properties of these steels are based on a sometimes delicate balance between thermodynamic (in) stability and dynamic processes, in which thermo…
The major factors, controlling surface degradation of magnesium alloys in oxygen‑containing atmospheres at temperatures of solid and liquid states, are reviewed. While thin oxide films, formed during initial stages, exhibit some protective behaviour, thick scales grown at high temperatures do not block the outward dif…
The optical limiting (OL) of nanosecond laser pulses in solutions of newly synthesized dyes in dimethyl sulfoxide (DMSO) has been investigated. These dyes are compounds of zinc phthalocyanine (ZnPc) with D-galactopyranosyl radicals (Gal) located in the peripheral (p-GalZnPc) and nonperipheral (n-GalZnPc) positions wit…
Теоретические исследования гидродинамики при подводном взрыве точечного источника© Н.И.Сидняев 1 1 МГТУ им.Н.Э.Баумана
Differential Scanning Calorimetry (DSC) is performed at different heating rates under non-isothermal conditions to study the specific heat studies of glassy Se80 − x Te20Sn x (0 ≤ x ≤ 10) alloys. An extremely large increase in the specific heat values has been observed at the glass transition temperature. It has also…
This study investigated the utility of a 3(2) factorial design and optimization process for nanoparticle suspension prepared by two different polymers Eudragit(®) RS 100 and Eudragit (®) RL 100 respectively. Total 18 formulations (9 formulations with each polymer) were prepared by solvent displacement technique. In th…
Quasi-conformal Transformation Optics (QCTO) has been proposed as a design technique for flattened or compressed optical and RF lenses. QCTO devices may be realized using all-dielectric gradient-index structures, which simplifies implementation and improves bandwidth for structures at optical wavelengths by avoiding t…
• High pressure pipe failed by fatigue in the fusion line of longitudinal weld. • Fatigue was caused by vibration of the line due to clamp missing. • Crack initiated and propagated through the high concentration region of weld joint. • Change of specified material (UNS S31803) by AISI 304L contributed to the failure.…
The temperature dependences of the damping constant and the order parameter are calculated for the lattice mode of E (1TO) in PbTiO3using the experimental data by the pseudospin-phonon coupled model and the energy fluctuation model. Calculation of the damping constant of soft mode is performed in the temperature range…
Polyamide 6,6 (PA 6,6) is widely used as a key synthetic material. However, its applications are constrained by rather low toughness. The existing methods of toughening show limited improvements and sometimes may take the sacrifice of tensile strength. In this study, we proposed a novel way, named pressure induced flo…
Residual hydrogen in the HDDR-treated Nd12.5Fe80.6B6.4Ga0.3Nb0.2powder and its effect on the coercivity of consolidated compact of the powder were investigated. Hydrogen desorption of the HDDR powder was studied by vacuum gauge and TPA. Compaction of the HDDR powder was performed by hot-pressing technique. The Nd12.5F…
The 2D problem of excitation of a circular metamaterial cylinder by a filamentary source is numerically investigated. It is found that, for the minus one values of the relative permittivity and permeability, the field on the surface of the cylinder concentrates in a region that is located on the illuminated surface of…
The thermal resistance of the contact between a metal and carbon nanotubes (CNTs) and between CNT layers is estimated by the local heating of CNT arrays (films) of different thicknesses using a focused laser beam and measuring their local temperature via Raman spectroscopy. It is demonstrated that thermal contacts bet…
Ce 0.8 Sm 0.2 O 1.9 (Samaria-doped ceria: SDC) precursors were synthesized by carbon-assisted spray pyrolysis. SDC thin films were prepared by electrophoretic deposition using the SDC precursor particles. The as-prepared SDC thin films were sintered at 1600 °C for 10 h. Uniform films with a thickness of approximately…
FePd, FePt, and CoPt alloy thin films are prepared on MgO(110) single-crystal substrates by using two different methods. One is one-step method consisting of deposition at an elevated substrate temperature of 600°C and the other is two-step method consisting of low-temperature deposition at 200°C followed by annealing…
Stainless steel exposed to gaseous tritium characteristically shows a firmly trapped fraction of tritium in the surface layer, which is not fully removable by water at ambient temperature. Prolonged thermal treatment of tritium-loaded specimens at <443 K causes substantial depletion of the bulk but almost no depletion…
Long and well-aligned ZnO nanowires were hydrothermally synthesized on FTO glass based on a ZnO seed layer which was prepared by spin-coating and annealing techniques. The effect of the growth solution refreshment on the morphology of ZnO nanowires was investigated and the possible mechanism was discussed. After refre…
In a screening test, typical traditional alloying elements for magnesium (Al, Mn, Zn, Y) were added to Mg10Gd alloy to study their influence on its corrosion resistance. The Mg10Gd1Mn alloy was identified as the most promising ternary alloy system. While addition of Gd alone disturbs the passive film formation the pre…
Cryogenic Treatment is a supplementary process for conventional heat treatment process in steel. It is an inexpensive one time permanent treatment affecting the entire section of the component unlike coatings. This experimental study investigates the effect of Cryogenic Treatment on the abrasive wear behavior of En45…