Materials Literature
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Synthetic nagyagite was grown from a melt as part of a search for materials with high-temperature superconductivity. Electron microprobe analyses of synthetic nagyagite and of nagyagite from the type locality Nagyág, Transylvania (now Săcărîmb, Romania) agree with data from literature. The crystal chemical formula [Pb…
A theoretical description of the mechanism and kinetics of the graphitization of diamond taking place with two sharply differing activation energies and accompanied by explosive disintegration of the graphitized diamond crystals is obtained in the approximation of a model interatomic interaction potential.
Copper/Benzocyclobutene Interconnects for Sub‐100 nm Integrated Circuit Technology: Elimination of High‐Resistivity Metallic Liners and High‐Dielectric Constant Polish Stops, Neirynck, J. M., Gutmann, R. J., Murarka, S. P.
A set of experiments on the solidification of Ga 1-x In x Sb alloys with a large variation of the sample diameter (from 1mm to 10mm), of the growth rate (from 0.7 to 7 μm/s) and of the concentration (from x=0.01 to x= 0.1) is described. The associated radial and longitudinal segregation of the In have been analysed by…
The relationship between extracellular poly(3-hydroxybutyrate) (PHB) depolymerase synthesis and the unusual properties of a succinate uptake system was investigated in Pseudomonas lemoignei. Growth on and uptake of succinate were highly pH dependent, with optima at pH 5.6. Above pH 7, growth on and uptake of succinate…
Measurements of initial sintering shrinkage of mixes of CaAl4O7 and CaAl2O4 are reported in the temperature range 1360–1420°C. The particle size chosen was -45 μm and the mix proportions were 5 : 8, 4 : 10, and 3 : 11 by weight of CaAl4O7 and CaAl2O4 . The soaking periods were from 10 to 180 min. The time dependence o…
In this paper, we present the results of our calculations of the phonon spectrum for the In4Se3 crystal in the central two-body interaction model without taking into account long-range forces. The model studied here contains five unknown parameters, which were determined from the experimental values of the elastic mod…
Unidirectional liquid crystal (LC) alignment produced by polarized UV exposure was examined using polyimides (PIs) synthesized using different diamines. The dichroic ratio of the resulting LC cells suggests that the UV photosensitivity is primarily controlled by the chemical structures of the PIs used. The UV absorpti…
The main objective of the paper is the description of the behavior and fatigue damage of inelastic solids in plastic flow processes under dynamic cyclic loadings. Experimental motivations and physical foundations are given. Recent experimental observations for cycle fatigue damage mechanics at high temperature of meta…
This paper obtains stress profiles of copper ion-exchanged glass waveguides from the analysis of transverse electric (TE) and transverse magnetic (TM) modes which was measured by means of the prism-coupling technique. The reconstruction of stress profiles have been realized from an interpolation of the obtained data o…
Die neue ternäre Phase Ti12Sn3O10 wird durch Umsetzung von Ti, TiO2 und Sn bei 1500 °C erhalten. Die Einkristall-Strukturanalyse (kubisch, Raumgruppe Fm3m, a = 13.5652(9) Å, Z = 8, wR2(I) = 0.048, R1(F) = 0.020) der luftstabilen Verbindung zeigt, daß ein neuer Strukturtyp vorliegt, in dem Strukturelemente von Oxiden u…
The properties of surface micelles formed from flexible short block copolymers of composition A f B 1 - f with f = 1 / 4 and chain lengths of N = 8 and N = 16 effective monomers are obtained from Monte Carlo simulation of a coarse-grained bead spring model. We consider the case where the surface has a short-range attr…
A new hexagonal compound, Al81Fe8Cr11, with lattice parameters a=4.00 nm and c=1.24 nm, was found in Al12FeCr2 and Al12Fe2Cr alloys by means of transmission electron microscopy. The main zonal electron diffraction patterns of this new hexagonal phase were found to resemble those of a group of hexagonal phases, especia…
A thermodynamical theory of elastoplasticity including kinematic hardening and dislocation density tensor is developed. The theory is self-consistent and is based on two fundamental principles of thermodynamics, i.e., the principle of increase of entropy and maximal entropy production rate. The thermodynamically consi…
The heat capacities of the solid and liquid K 3 LnCl 6 compounds (Ln = La, Ce, Pr, Nd) have been determined by differential scanning calorimetry (DSC) in the temperature range 300 -1100 K. Their temperature dependence is discussed in terms of the phase transitions of these compounds as reported in literature. The heat…
Many ceramics contain microcracks, which are often situated between sintered grains. These microcracks constitute thermal resistances, which may affect heat transfer through the material and its effective thermophysical properties. The thicknesses and the contact areas of the microcracks change with temperature as a r…
We present results of atomistic simulations of the interaction between self interstitial atoms and vacancies with edge dislocations in BCC iron. The calculations are carried out using molecular dynamics with an energy minimization scheme based on the quasi-Newton approach and use the Finnis-Sinclair interatomic potent…
A laboratory electrochemical investigation was carried out on the effects of inorganic sulphide (1 ppm) and ammonia (10 ppm), as sea water pollutants, on the corrosion of 70Cu–30Ni alloy owing to sulphate reducing bacteria (SRB). Potential–time and linear polarisation measurements revealed that the presence of SRB mak…
The Zr‐V‐Ni system multicomponent alloys were investigated by electrochemical measurements, X‐ray diffraction analysis, scanning electron microscopy, and energy‐dispersive spectroscopy. At room temperature, the discharge capacity of alloys remains at a high level when = 0.3–0.5. A C15 main phase alloy has good capacit…
In recent years, ion exchange membranes (IEM) have been used successfully to determine the availability of soil nutrient elements for plants. In general, the procedures proposed are applied to the determination of a single ion, and in only a few of these studies, the selectivity of these IEM was considered. Therefore,…