Materials Literature
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Aspects of the liquid-tin assisted directional solidification process that have the greatest impact on cooling conditions at the solidification front have been investigated. Thermal conditions within the mushy zone of the casting and outside the mold in the tin bath were characterized experimentally as a function of c…
Rotating bending fatigue test was carried out using AZ31 extruded magnesium alloy in order to clarify the S-N curve, crack initiation and propagation behavior of the alloy. The mechanisms of both crack initiation and crack arrest at the grain boundary during the fatigue process were investigated in detail with a speci…
A Polymer-Stabilized Cholesteric Liquid Crystal (PSCLC) is elaborated by combining the UV-curing with a thermally-induced pitch variation. We intend investigating possible memory effects into the characteristics of the reflection band of the PSCLC when the material comes back to the room temperature. Different thermal…
Polypyrrole (PPy) was synthesized by chemical oxidative polymerization of pyrrole in aqueous solution containing an oxidant, ferric sulfate, or potassium peroxydisulfate and an anionic surfactant, sodium bis(2-ethylhexyl) sulfosuccinate (AOT).The addition of AOT to the polymerization mixture leads to the incorporation…
The recent advent of several key behavioral issues in nuclear fuel performance, resulting from the trend toward increased fuel utilization, has created the need for enhanced steady state and transient fuel rod analysis capabilities. These issues, derived primarily from burnup-induced pellet changes and increased hydro…
Abstract The morphology of blends of two types of hydrogen-bonding systems was studied with a view to understanding the effect of blending on the extent of hydrogen bonding and changes in the morphology.One of them is the long-chain carbamate with a C 18 alkyl side chain, and the other is stearic acid, which also has…
Magnetoliposomes (ML′s) may be successfully applied for several purposes. A dimyristoylphosphatidyl‒choline‒based ML (ML‒2) sample was developed as a precursor of more complex thermal cancer therapy systems. The present study reports on morphology and magnetic resonance (MR) investigations carried out with the magneti…
We describe the electrosynthesis of a composite film consisting of polypyrrole and poly(1,5-diaminonaphthalene) (PPy-PDAN) on iron in neutral aqueous medium. The film structure was characterized by Raman and Fourier transform infrared spectroscopies. The composite film is composed first of layers of PDAN at the metal/…
Binary mixtures based on lactic acid derivatives were prepared and studied. Pure compounds differ in the type of linkage of the non-chiral chain to the molecular core, either keto or ether groups, and besides the SmA and SmC* phases they exhibit the antiferroelectric SmC A * or hexatic SmF(I)* phases, respectively. Ph…
In this article, possibilities for high-throughput single crystal structure determinations and analysis of results, currently being developed in the author's laboratory, are reviewed. Methods for the automated insertion of mounted crystals on the goniometer of a diffractometer, collection and processing of cell and in…
Aging effect of dense 8 mol % yttria-stabilized zirconia (8YSZ) ceramics with different microstructures has been studied. Spark-plasma sintered (SPS) ceramics consisting of submicrometer grains showed relatively slow conductivity degradation with aging time compared with conventionally sintered ceramics. Conductivity…
Carbon disulphide was used to modify the surface of silica gel phases containing amine moieties for the formation of four phases-immobilized dithiocarbamate derivatives (I–IV). Characterization of the surface modification by the organic modifier was accomplished by several means of instrumental analysis. These include…
The mechanical properties and deformation mechanisms of nano-polycrystalline (NPC) materials under tension are studied using molecular dynamics. The embedded atom method (EAM by Mishin et al. 1999) and the effective medium theory (EMT by Jacobsen et al. 1987) are adopted as the interatomic potentials of Al to investig…
The impurity-induced ferroelectric phase transitions in incipient perovskite ferroelectrics are discussed along with improper ferroelastic phase transitions. It is shown that the critical concentration of impurities is proportional to 1/ϵ3/2 and that the ferroelectric phase transitions probably suppress ferroelastic t…
Uniform dispersion of fine particles of poor wettability in molten steel is of essential importance for enhancing the efficiency of the steel refining processes. Although model investigations on the dispersion of fine particles of good wettability have extensively been carried out, those for fine particles of poor wet…
We have investigated the initiation and propagation of filiform corrosion on coated aluminum surfaces using a new experimental set-up for in situ Fourier transform infrared (FTIR) microspectroscopy and the scanning Kelvin probe. During the initiation partially hydrolyzed aluminum chloride was formed in a defect on the…
This paper is concerned with the development of low cost, brushless dc, high volume of production electrical machines, exploiting the special properties of compacted, insulated iron powder (or soft magnetic composite, SMC). The specific market for the application of this technology is the various electrical drives use…
During secondary recrystallization of grain oriented silicon steel, isolated grains are often observed in secondary-recrystallized Goss grains (matrix). In an extraction experiment, the crystallographic relations between each isolated grain and the matrix were investigated. Although the Σ9 grain boundary against Goss…
To understand a void formation mechanism in electroplated Cu interconnects used for Si-ULSI (ultra-large scale integrated) devices, microstructures of Cu films which were prepared by the electroplating technique using plating baths with or without organic additives were investigated by transmission electron microscopy…
SUMMARIES The utility of polarised attenuated-total-reflectance (ATR) FTIR spectroscopy was investigated for the identification of cellulosic fibres and characterisation of their state of degradation. Turning the polariser so that the electric vector is parallel (Epll) or perpendicular (Eprp) provides a means of asses…