Materials Literature
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Nd-Fe-B alloys can be rapidly solidified to produce a highly stable, magnetically isotropic powder which can be processed directly into either bonded magnets or, if not pressed, into anisotropic magnets with energy levels exceeding 40 MGOe. Current processing methods are briefly reviewed, as are some of the unique adv…
The effect of lateral fluorine substituents on the dielectric properties of a range of nematic liquid crystals is reported. Measurements of dipole moments and electric permittivities have been made and used to calculate Kirkwood correlation factors over a range of temperature. The results show that the extent and natu…
It has been tried to design and prepare SiC/C Functionally Gradient Material (FGM) accompanying compositional gradient from SiC to C, for developing thermal-barrier materials for space plane. Thermal stresses in SiC monolith and SiC/C⋅FGM were calculated, based on one-dimensional linear analysis for a cylindrical mode…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOxygen atom transfer chemistry of heteropolytungstate 'browns' in nonaqueous solventsKent Piepgrass and Michael T. PopeCite this: J. Am. Chem. Soc. 1989, 111, 2, 753–754Publication Date (Print):January 1, 1989Publication History Published online1 May 2002Published inissue 1…
The co-ordinating properties of the ligand 3,5-bis(2-pyridyl)pyrazole (Hbpypz) are reported and complexes of general formulae [M(bpypz)]NO3·xH2O (M = CoII, NiII, CuII, ZnII, or CdII), [M(bpypz)] Cl·xH2O (M = MnII, CoII, NiII, or ZnII), and [M(bpypz)]Br·xH2O (M = CoII NiII or ZnII) are described. The crystal and molecu…
Abstract
—The mechanical properties of polystyrene filled with chemithermomechanical pulp and wood residues of softwood and hardwood species, which were precoated with phthalic anhydride and various polymers, e.g. polystyrene and PVC, have been investigated. The extent of improvement in the mechanical properties of the composi…
A B S T RA C T : Existing data on interatomic potentials have been used to study the interactions between an uncharged clay sheet and a water molecule. Calculations show that most of the clay surface is relatively hydrophobic, with binding energies for a water molecule in the range 1-0-4.5 kcal mo1-1 . There is, howev…
Abstract The ability of two representative oxisols from the Cerrado region of Brazil to adsorb Ca 2+ and SO 2‐ 4 , when in their natural acidic state, was determined by using dissolved CaCl 2 , K 2 SO 4 and CaSO 4 salts as adsorbates. Calcium adsorption from CaCl 2 and CaSO 4 was nearly linearly dependent on the equil…
A fuel/coolant interaction (FCI) is a phenomenon that may occur during a light water reactor severe accident when molten fuel comes into contact with residual water in-vessel or in the reactor containment. A new one-dimensional multifluid transient model, which currently has the capability of examining nonexplosive FC…
info:eu-repo/semantics/published
—Linear low-density polyethylene (LLDPE) was reinforced with chemithermomechanical (CTMP) aspen fiber, wood flour, and cellulose flour. Wood fibers were treated with isocyanate or a vinylsilane coupling agent to improve the adhesion between the fiber and polymer. Composites were made at different weight percentages of…
Description Provides overviews of the major developments in fracture mechanics and associated applications over the past 20 years, and highlights directions for future developments and applications. 6 major sections include: • Analytical Fracture Mechanics • Nonlinear and Time Dependent Fracture Mechanics • Microstruc…
Description STP 1033 provides a unique perspective on stabilization and solidification research as performed by the hazardous and radioactive waste communities. These papers are grouped into 4 sections: Processes; Regulatory Aspects and Testing Methods; Laboratory Evaluation; and Large Scale Evaluation or Demonstratio…
F.t.i.r. spectroscopy has been used for the study of dehydration of heteropolyacids (HPA) of the series H3+xPMo12–xVxO40 carried out in vacuo at 298–673 K and also for the study of ammonia sorption on the same samples. Pumping at room temperature results in the departure of water of crystallization; the protons, which…
A sulfide ion at the center of an Ni6 prism capped by two additional Ni atoms, and the presence of nine μ2-StBu bridges are the characteristic features of the structure of 1. The mean oxidation state for nickel in diamagnetic 1 is + 1.25. The anion 1 is the first pure nickel–sulfur complex with nickel in an unusual ox…
Grain‐oriented Bi 4 Ti 3 O 12 ceramics have been prepared by hot‐pressing. Platelike grains align during hot‐pressing; the long‐axis direction perpendicular to the crystal c axis is oriented perpendicular to the pressing direction. The effects of hotpressing conditions such as temperature, pressure, time, and type of…
The heteropolyanions [XW11O39{MnII(OH2)}]n–[X = P(1), Si (2), Ge (3), or B (4)] and α2-[P2W17O61{MnII(OH2)}]8–(5) have been transferred into non-polar solvents (benzene, toluene) with the aid of tetraheptylammonium bromide or other phase-transfer agents. Following dehydration of their non-polar solutions, anions (2) a…
The band gap of the mixed perovskite BaSn1–xSbxO3 has been reported to be 134 kJ mol–1(J-M. Hermann, M. R. Nunes and F. M. A. da Costa, J. Chem. Soc., Faraday Trans. I, 1982, 78, 1983), corresponding to 1.4 eV, which is the optimum value for solar-energy conversion. In order to confirm this value, pressed discs of the…
The increased discharge burnups envisaged today require an optimization of the Zircaloy cladding properties with regard to corrosion with different strategies for optimizing the corrosion for boiling water reactor (BWR) and pressure water reactor (PWR) applications. A broad laboratory study showed that the influence o…