Materials Literature
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Two new low cost β titanium alloys, Ti–4.3Fe–7.1Cr (TFC alloy) and Ti–4.3Fe–7.1Cr–3.0Al (TFCA alloy) for healthcare and medical applications have been recently developed. As for such applications, the alloys are necessary to have high fatigue performance. The aim of this study is, therefore, to investigate fatigue cha…
Mesoporous silicates are prepared by templating on the hexagonal (H1) mesophase of surfactant bipyridine complexes of ruthenium(II) using a true liquid-crystal templating approach. On calcination, the surfactant template is removed except for the central metal ion that is oxidised, forming nanoparticles of RuO2 that d…
Abstract Oligo(naphthalene-2,3-diyl)s are synthesized by the palladium-catalyzed cross-coupling reactions of 2-naphthylzinc compounds with 2-bromonaphthalene derivatives. An NMR analysis together with an X-ray diffraction study supports the conjecture that the helical secondary structure is a common feature of the ass…
Reduced Activation (RA) martensitic steels of the 9/11CrWVTa type are promising candidates for fusion reactor applications as long as they exhibit good mechanical properties—similar to those of commercial martensitic steels of the 9/12CrMo(NbV) type—and satisfy design criteria related to the behavior under irradiation…
Se han comprobado que las películas delgadas de polianilina (PANI) son elementos óptimamente sensibles para detectar a los gases de NO2 y NH3 a temperatura ambiente. Aunque el resultado de la adsorción de ambos gases resulta en el cambio de color de las películas, de verde a azul, el mecanismo de interacción de cada u…
Pb(Mg 1/3 Nb 2/3 )O 3 –PbTiO 3 (PMN–PT) (70/30) thin films were deposited by pulsed laser deposition using two growth strategies: adsorption controlled deposition from lead‐rich targets (∼25–30 mass%) and lower‐temperature deposition ( T d ≤600°C) from targets containing a small amount of excess lead oxide (≤3 mass %)…
The use of calcium-based stabilizers such as calcium oxide (lime) in sulfate-bearing clay soils has historically led to structural distress because of the formation of a mineral called ettringite and possibly thaumasite. In trying to control the damage associated with such formations, engineers have attempted to deter…
High quality sol-gel derived ZnO and ZnO:Al thin films were deposited on corning (7059) glass substrates by spin coating. The annealed films showed the c-axis-preferred orientation. The structural, electrical, and optical properties of the films were investigated as a function of Al concentration from 0 to 3.0 at. %.…
The oxygen transmission rate (OTR) of packaging materials used for modified atmosphere packaging (MAP) of chilled products varies extensively with temperature, relative humidity (RH) and material thickness after the thermoforming of packages. Two different polymer combinations were studied: APET/PE (tray) and PA/PE (l…
Weld samples of fusion reactor vanadium alloy (NIFS-HEAT-2) were neutron-irradiated at 563 K up to 4.5×1023 neutrons/m2 (0.08 dpa). The recovery of irradiation hardening, degradation of impact properties, and damage structures in the weld metal were investigated after post-irradiation isothermal annealing at temperatu…
3,3′,4,4′-Diphenylsulfonetetracarboxylic dianhydride (1) was reacted with L-isoleucine (2) in acetic acid and the resulting imide-acid (3) was obtained in high yield. The diacid chloride (4) was prepared from the diacid derivative (3) by reaction with thionyl chloride. The polycondensation reaction of diacid chloride…
We report on the upconversion luminescence of a pure YVO4 single crystal excited by an infrared femtosecond laser. The luminescent spectra show that the upconversion luminescence comes from the transitions from the lowest excited states 3T1, 3T2 to the ground state 1A1 of the VO4 3-. The dependence of the fluorescence…
In the absence of moisture and at room temperature, the activity and saturation of CO on gold cluster anions, Au(N)-, are known to be highly dependent on the size of the cluster. Small Au(N)- clusters (N = 2,3) showed no adsorption activity, and the saturation CO adsorption values did not increase proportionately to c…
Amorphous silica and related silica-based materials have been widely developed in optoelectronics and optical telecommunications technology. Despite comprehensive research for over the decades, the subject of amorphous silica continues to excite the interest of researchers in the field of chemistry, physics, and geolo…
Y2O3:(Eu,B) red phosphor was obtained by a thermal decomposition technique of a mixture of yttrium–ethylenediaminetetraacetic acid (Y–EDTA), Eu–EDTA and boric acid. The doping ratio of boron, [B]/([Y]+[Eu]), in the starting material was varied from 0 to 1. The properties of morphology, crystallization behavior, metal…
In this paper we report the synthesis and characterisation of the perovskite cuprate phases YSr2Cu2MO7+y (M = Co, Fe) in order to examine their potential for use as cathode materials in solid oxide fuel cells (SOFCs). Both samples showed conductivities of ≈10 S cm−1 at 900 °C and were also shown to be stable at this t…
Metal-oxide interfaces of three different materials irradiated in a pressurized water reactor have been analyzed by TEM and AEM. Standard Zircaloy-4. low-tin Zircaloy-4. and Zr-2.5%Nb were used for this study. The microstructure of the material on the two sides of the metal-oxide interface, the geometry of the interfa…
We report a new type of 2,2'-bipyrrole derivatives that bear four aryl groups at the 1, 1', 5 and 5' positions.These compounds were synthesized by two routes: (i) the reaction of 1,8-diaryl-2,7-ditosyl-1,7-octadiene-3,5-diynes (4) with anilines was performed in the presence of CuCl at 150 o C; (ii) the above compound…
A novel one-step solvothermal process has been developed for the preparation of Eu 3 + actived yttrium oxysulfide phosphor in ethylenediamine solvent at 280 ° C through a reaction of yttrium oxide, europium oxide, and sulfur powder. The products were characterized by X-ray diffraction, photoluminescence, and scanning…
reacted with s-valine (2) in acetic acid and the resulting imide-acid [N,N'-(pyromellitoyl)-bis-s-valine] (4) was obtained in high yield. The compound (4) was converted to the N,N'-(pyromellitoyl)-bis-S-valine diacid chloride (5) by reaction with thionyl chloride. The polycondensation reaction of this diacid chloride…