Materials Literature
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Nous avons determine la structure cristalline de membres de la solution solide pyrophanite-ecandrewsite, Mn 1 - x Zn x TiO 3 (0.1 ≤ x ≤ ≤ 0.8 apfu), synthetisee selon des methodes ceramiques dans l'air a pression ambiante, par affinement de Rietveld de donnees obtenues par diffraction X sur poudres. Tous ces composes…
The impedance properties (resistance and capacitance) of oxide scales on the martensitic/ferritic steel HT-9 and austenitic stainless steel Type 316L (UNS S31603) were examined during immersion in lead-bismuth eutectic (LBE) using a technique similar to electrochemical impedance spectroscopy. These scales were created…
Abstract The high‐pressure Raman spectra of antiferroelectric CsBi(MoO 4 ) 2 were measured at room temperature. These studies indicated that this crystal exhibits two pressure‐induced phase transitions at 0.6 and 1.0 GPa. The stable phase in the 0.6–1.0 GPa range was identified as having the same structure as the ambi…
Geomorphic surfaces that present soils derived from basic rocks under warm and humid climate are unique scenarios for studying tropical soils. This paper aimed to characterize and classify two pedons derived from basalt at the Atlantic Forest Zone, Pernambuco State, Northeastern coast of Brazil. Two representative ped…
Composites with VO2 particulate inclusions as a negative stiffness phase were fabricated through powder metallurgy. The composites are predicted to exhibit enhanced anelastic damping by virtue of the partially constrained negative stiffness of the inclusions in the vicinity of a ferroelastic phase transformation, and…
Abstract The development of new propellant binder systems requires the thermodynamic calculation of physico‐chemical data as well as the adaption of the mechanical properties in order to achieve a reliable innerballistic profile of the resulting propellant. Therefore, this study focuses on the mechanical properties of…
This paper proposes a model to explain tritium release behavior of an irradiated Li4SiO4 sample made by Forschungszentrum Karlsruhe. The release curves were obtained in a series of experiments carr...
Summary A new scavenger has been developed that relies on the affinity between iron and sulfide. The active chemical is a form of ferrous iron complexed with a carbohydrate derivative. It is highly soluble in the brine phases of water-based mud (WBM) and will not precipitate at pH values greater than 12. When the iron…
Optimization of contours of three dimensional electrode-spacer arrangements used in gas insulated systems (GIS) has been carried out by ANN aided genetic algorithm (GA) to obtain desirable electric stress distribution along the insulator surface. Two cases have been studied and reported in detail. Multilayer feed-forw…
Abstract The IR-spectra of 4-aminopyridine (4-AP) in solution and in the solid state have been analyzed, using the reducing-difference procedure. Defining a more precise band assignment of a part of the characteristic frequencies of 4-AP, the data obtained proved in particular a Fermi-resonance splitting of the symmet…
The ability of chromate as an anticorrosive pigment incorporated into primer coatings to inhibit the corrosion of galvanized steel has been studied using cell modeling conditions at defects of painted sheets. The experiments were performed at different temperatures (4, 22, and 40°C) and chloride concentrations (1 mmol…
Abstract Additional information about the relative intensities of reflections that overlap in a powder diffraction pattern can be obtained from a polycrystalline sample in which the crystallites are preferentially oriented. If the data are collected and analyzed appropriately, more single-crystal-like reflection inten…
Abstract This article reviews various phases and constituents found in the microstructures of low-carbon and coated steels. It provides information on the criteria for selecting proper metallographic procedures. Techniques used to prepare metallographic specimens of low-carbon steels and coated steels, such as section…
Abstract Die Synthesen und die Kristallstrukturen des Liganden N, N‐Diethyl‐N′‐(2‐fluor)benzoylselenoharnstoff HEt 2 mfbsu und dessen Ni II ‐ und Zn II ‐Komplexen sowie des Liganden N, N‐Diisobutyl‐N′‐(2‐fluor)benzoylselenoharnstoff HBu i 2 mfbsu und dessen Ni II ‐ und Pd II ‐Komplexen werden berichtet. Die Liganden k…
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Abstract The low-frequency mechanical properties of pure and Ca-doped lead orthophosphate, (Pb 1– x Ca x ) 3 (PO 4 ) 2 , have been studied using simultaneous dynamical mechanical analysis, X-ray diffraction (XRD), and optical video microscopy in the vicinity of the first-order ferroelastic phase transition. Both sampl…
Abstract This article describes the microstructure and metallographic practices used for medium- to high-carbon steels as well as for low-alloy steels. It explains the microstructural constituents of plain carbon and low-alloy steels, including ferrite, pearlite, and cementite. The article provides information on how…
Abstract Polymeric chain complexes, [Ru2(piv)4(pyz)]n(BF4)n·3nH2O (1), [Ru2(piv)4(4,4′-bpy)]n(BF4)n·nH2O (2), [Ru2(piv)4(dabco)]n(BF4)n·2nH2O (3), [Ru2(piv)4(phz)]n(BF4)n (4), and [Ru2(piv)4(H2O)2(tmpyz)]n(BF4)n·nCH2Cl2 (6), (Hpiv = pivalic acid, pyz = pyrazine, 4,4′-bpy = 4,4′-bipyridine, dabco = 1,4-diazabicyclo[2.2…
Abstract The water stability of electrospun poly(vinyl alcohol) (PVA) nanofibres was improved significantly by annealing with poly(acrylic acid) (PAA). Effects of annealing were tested on solution-cast PVA/PAA films by measurement of the swelling degree. The influence of PVA/PAA ratio, annealing temperature and period…
In this study we have investigated temperature and frequency dependence of magnetic properties of superparamagnetic iron oxide nanoparticles (SPION). ESR measurements have been carried out in a temperature range of 10–300 K. A single, relatively broad and temperature dependent EPR signal was observed at all measuremen…