Materials Literature
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Abstract The recent development of the method for analyzing repassivation rate by a rapid scratch test and high field conduction model makes it possible to predict SCC susceptibility more quantitatively but it is impossible to distinguish the repassivation rates with a little difference due to the inaccurate measureme…
A panel of nitro substituted 5,15-diaryl-porphyrins, featuring nitro groups either on the phenyl rings or on one of the two free meso-positions, was synthesized. In the former category, compounds 5-(3-nitrophenyl)-15-phenylporphyrin, 5,15-di(3-nitrophenyl)porphyrin and 5-(4-nitrophenyl)-15-phenylporphyrin were obtaine…
In this paper, an efficient genetic algorithm has placed burnable poisons (BPs) into all of the fresh fuel positions in the core employing the optimized BP configurations and techniques developed in two previous papers. Of importance was the previous development of a Kinf filter, which greatly reduced the computationa…
Abstract The thermodynamic properties of the Al –Na and Na–Al – H systems have been assessed by combining the “calculation of phase diagram” approach with first-principles predictions. The Gibbs energies of the individual phases were thermodynamically modeled, where the model parameters were obtained from best fit opt…
Abstract Fracture-mechanics experiments were carried out on ultrafine-grained (UFG) samples of copper, titanium and an Al alloy to obtain the fracture behaviour under static and cyclic loading. The UFG-materials investigated show crack resistance behaviour under static loading, which was confirmed by ductile fracture…
Lanthanum chromite (LaCrO3) is one of the most adequate materials for use as interconnector in solid oxide fuel cell (SOFC) applications, due to its intrinsic properties, namely its good electrical conductivity and resistance to environment conditions in fuel cell operations. Due to difficulties in sintering, additive…
Fibre hornification was evaluated by a parameter termed 'hard-to-remove (HR) water content', which was defined as the ratio of water mass to fibre mass at the transition between the constant rate zone and the falling rate zone from the isothermal TGA experiments. The results indicated that the HR water content could b…
Carbon nanotubes (CNTs) have electron affinities similar to those of fullerenes and they are therefore capable of acting as radical traps in free radical chain reactions, including polymerisation and the thermo-oxidative degradation of polymers. It is proposed that the CNTs used as integral part of polymer composites…
An investigation on the ferroelectric and dielectric properties of higher-valent-cations Nb-and Mo-modificated SrBi4Ti4O15 ceramics was presented. The ferroelectric property of SrBi4Ti4O15 was both obviously improved by niobium and molybdenum doping. The remnant polarization (2P r ) of both Nb-and Mo-modificated SrBi4…
We attempted to investigate the surface potential relaxation of ferroelectric thin film domain by using Kelvin probe force microscopy (KFM). To avoid charge suction phenomenon by a grounded tip, the offset voltage was applied to the base line of the pulse trace. It was found that the surface potential contrast decreas…
The subgenus DECUSSATA R.M. Patrick was recently elevated to generic status as Decussata (R.M. Patrick) H. Lange-Bertalot & Metzeltin in Lange-Bertalot (2000. Iconographica Diatomologica, 9, 670–673) to accommodate Navicula placenta Ehrenberg and its allies. The description of Decussata is based on characteristics of…
Ultrafine magnetic nickel ferrite particles have a significant potential for use in many applications such as magnetic recording media, ferrofluids, microwaves, catalysis and radar-absorbing coatings [1, 2]. Nickel ferrite powders with a nominal NiFe2O4 composition were synthesized by combustion reaction and an evalua…
W.H. Hartt discusses “Does Calcareous Scale Formation on Cathodically Protected Steel Affect Hydrogen Uptake?,” by G. Hinds and A. Turnbull, which was published in CORROSION 61, 9 (2005), p. 835-837. A reply from G. Hinds and A. Turnbull follows.
Abstract September 24, 2006 Summary: In this work, we address the industrially relevant problem of the foaming of expandable polystyrene (PS) impregnated by pentane as a traditional down‐stream processing in the suspension polymerization of styrene. Once the polystyrene foam is formed by means of a proper foaming agen…
Located at a subtropical latitude, the expansive Florida Everglades contains a mixture of tropical and temperate diatom taxa, as well as a unique flora adapted to the calcareous, often excessively hot, seasonally flooded wetland conditions. This flora has been poorly documented taxonomically, although diatoms are reco…
An extensive work for the realization of tilted liquid-crystalline (LC) phases of operational viability and display interest as tuned by the alternating (double) hydrogen bonding in the linear intermolecular complexes is presented. A new family of double-hydrogen-bonded liquid crystals formed between mesogenic p-n-alk…
Polycrystalline samples of FeTe2 substituted with Co were prepared by powder metallurgy, and their thermoelectric properties were investigated. When the substitution amount x increased to 0.4, their electrical conductivity increased to approximately 2000 S∕cm at room temperature and their lattice thermal conductivity…
An overview of the evolution of artificial photosynthetic charge transfer systems containing porphyrin donors and pyromellitic or naphthalene diimide acceptor units is presented. Progression in this area of research is highlighted by the complexity of the systems, the nature of the medium separating donor and acceptor…
The state of the surface of natural clay minerals containing montmorillonite (lamellar structure), clinoptilolite (rigid skeleton structure), and palygorskite (lamellar-banded structure) and of the same minerals modified with a 17% solution of sulfuric acid was examined. It was established that the modification affect…
ent-Halimic acid was used as the starting material for an efficient synthesis of a series of tetranor derivatives, functionalized at C-18. These compounds could be used to synthesise [4.3.3]propellanes, oxides and lactones similar to ambreinolide, all of which may be of interest to the perfume industry.