Materials Literature
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Abstract The electron paramagnetic resonance spectra of some gadolinium(III)-β-diketonate complexes were observed as frozen solutions. The observed spectra differ from each other upon changing the ligands, indicating that a change of the ligand fields and/or coordination structure of the ligands has a great effect on…
Different approaches to solution of the kinetic equations for relaxation of electronic excitations (analytical, numerical solution of integro-differential equations, and Monte-Carlo simulation) display the properties and evolution of the excited region created by the absorption of a high-energy photon. The relaxation…
The Prototype Fast Reactor (PFR) at Dounreay, UK, started operation in 1975 and was closed down in 1994. The present report contains a description of the PFR nuclear power plant, based on information available in literature and on information supplied during a visit to the plant. The report covers a description of the…
Abstract. Nucleation and interface propagation criteria are derived with account for temperature variation in the course of phase transition (PT) and internal variables. A model problem concerning the nucleation of thin inclined infinite layer in a rigid-plastic half-space under prescribed normal and shear stresses is…
Calorimetry and internal friction were used to study the martensitic phase transformation of shape-memory metal matrix composites consisting of nearly equiatomic NiTi with up to 20 vol.% TiC particles. The start and final temperatures for the austenite-martensite transformation (Ms, Mf) and martensite-austenite transf…
Three- and two-photon excitation of high-lying energy levels of ${\mathrm{Nd}}^{3+}$ was realized in La${\mathrm{F}}_{3}$: ${\mathrm{Nd}}^{3+}$ crystals using fundamental radiation of a tunable ${\mathrm{Ti}}^{3+}$ -sapphire laser. Strong UV and green-red luminescence lines were obtained by the three- and two-photon e…
Abstract A new type microporous polypropylene film was prepared simply by biaxial drawing of β-crystalline phase polypropylene The effect of draw ratio on the pore size distribution, ethanol sorption, and porosity, as well as β-α transformation during drawing were studied For the purpose of improving its hydrophilicit…
Abstract The antistatic behavior of glyceryl monoesters in polypropylene (PP) is measured at concentrations down to 0.30 wt%. Water contact angles and XPS analyses are used to explore the mechanism of internal antistats. Orientation of glyceryl monostearate (GMS) at the surface of PP is determined. Several new antista…
Abstract. The shape memory effect and the microstructures of Fe-30Mn-6Si(wtO?) alloy subjected to Werent training treatments have been studied in present paper. It has been found that the recovery strain increases significantly through the training treatment of 4 % tensile pre-strain followed by recovery annealing at…
A general adjoint coupled electron-photon Monte Carlo code for solving the Boltzmann-Fokker-Planck equation has recently been created. It is a modified version of ITS 3.0, a coupled electron-photon Monte Carlo code that has worldwide distribution. The applicability of the new code to radiation-interaction problems of…
The late-time phase-ordering kinetics of the O(n) model for a nonconserved order parameter are considered for the case where the O(n) symmetry is broken by the initial conditions or by an external field. An approximate theoretical approach, based on a ``Gaussian closure'' scheme, is developed, and results are obtained…
Abstract Sepiolite from Vallecas (Spain) was treated with HCl solutions (1.25; 2.5; 5.0; 10.0 and 20.0 wt%) at 25°C for 2, 6, 24 and 48 h. The solutions obtained after washing the acid treated samples were analysed and a kinetic model was applied to the cation dissolution data. The development of porosity and number o…
More than 50 manikins are in use world-wide. They represent various levels of development in terms of technique and performance. The more sophisticated are articulated manikins able to assume different postures and body movements. They are electrically heated and divided into several (up to 36) individually controlled…
The porous structures of synthetic active carbons have been examined in detail on the basis of nitrogen adsorption isotherms at 77 K using the αS method, the Dubinin–Stoeckli approach and the regularization technique. Analysis of the porosity of synthetic active carbons shows that carbons obtained under identical cond…
Article Mechanisms of Powder Milling Investigated by X-ray Diffraction and Quantitative Metallography was published on December 1, 1995 in the journal International Journal of Materials Research (volume 86, issue 12).
A survey of species of Synurophyceae in samples collected over the last ten years from freshwater bodies of central Portugal resulted in the identification of 33 taxa of Mallomonas and 6 of Synura , of which a total of 24 taxa are reported for the first time from Portugal by means of electron microscopy. A short ecolo…
Fe-based shape memory alloy ( SMA ) pipe couplings have been developed and successfully used in oilfields and chemical engineering departments. Using the pipe coupling connecting pipe line will avoid the serious corrosion near the welding zone, which usually occur due to the use of the traditional welding technique. T…
Two experiments delineate the nature of the broad, weak, 3-eV absorption band in Al2O3: (1) anion self-implants clearly establish its association with aluminum vacancies, and (2) optical properties of this V-type center are exemplified after hole transfer from Ti+4 impurities. These properties confirm a previous theor…
Abstract— Novel UV‐curable liquid crystals showing nematic phases at room temperature have been developed. The liquid crystals can be utilized to create retardation films with high quality and good thermal stability. The properties of novel UV‐curable liquid crystals and the fabrication of various kinds of retardation…
Wires of Ti-51.14 at.%Ni have been either solution treated and subsequently aged at 520°C or only aged. Differential thermal analysis (DTA) has been used to characterise the macroscopic behaviour of the martensitic transformation and transmission electron microscopy (TEM) to study the microstructure. It has been found…