Materials Literature
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The trigonal (P-3 m1) modification of Cs 3 Bi 2 Br 9 and Cs 3 Sb 2 I 9 have been studied using NQR, X-ray single crystal and powder pattern methods. Moreover, the heat capacity was measured in a wide temperature interval: 4-300 K. In Cs 3 Bi 2 Br 9 a second-order phase transition was found at T C = 96 K. The low-tempe…
This study determined the influence of moisture, ensiling time and their interactions on the losses of hemicellulose and cellulose during ensiling of orchardgrass. Orchardgrass containing 80 (HM), 70 (MM) and 55% (LM) moisture was ensiled in 3 laboratory silos of 500 ml capacity for 3, 7, 21 and 91 days. The dry matte…
On the basis of laboratory experiments with model mixtures, the steps in the de novo synthesis of halogenated compounds were studied. The study was performed using a thermobalance to evaluate the temperature of the maximum rate and the kinetics of the decomposition of the materials in the presence of air. The effect o…
Phase decomposition in a Ti–13 mass%Nb–13 mass%Zr alloy during isothermal aging at 600°C has been investigated by means of transmission electron microscopy and Vickers hardness measurements. Specimens solution-treated at 1000°C in β phase field were quenched and aged at 600°C in (α+β) region. Beta phase was fully tran…
Abstract The articles in this text have been assembled to give readers an idea of the large number of research possibilities associated with combining electrochemical methods with clay research. The first article is introductory in nature. It describes the common features of the diffuse double layer that intrigue clay…
The debris component of the dislocation substructure in copper single crystals deformed at 78 K was studied by weak-beam transmission electron microscopy. The following defects were identified: primary unfaulted dipoles, faulted dipoles, stacking-fault tetrahedra and defect clusters. It is shown that all these defects…
Fiber fines present in papermaking furnish can have an adverse effect on the productivity of paper machines, especially at high fines levels and in products having high basis weight. The goals of this study are to compare the effects of different types of fine, fibrous material on the ease of water removal from paper…
Superplastic behaviour of Mg-alloy AZ31 was investigated to clarify the possibility of its use for superplastic forming (SPF) and to accurately evaluate material characteristics under a biaxial stress by utilizing a multi-dome test. The material characteristics were evaluated under three different superplastic tempera…
We have grown the compound semiconductor ZnO1—xSex by MBE. A decrease in bandgap energy with increasing Se composition x was observed and a large bowing parameter of 12.7 ± 1.6 eV was measured. This indicates the possibility of bandgap bowing in the ZnO1—xSex compound system and may open up new bandgap control techniq…
The reaction of HNO3 with decane (C10H22) soot generated in the laboratory has been studied in a Knudsen flow reactor. Two different types of soot were produced: Soot originating from a rich flame of decane and air (“grey” soot) and soot generated from a leaner flame of decane and air (“black” soot). Both HNO3 uptake…
Vapor-Grown Carbon Fibers may be modified by surface or temperature treatment to be effective in reinforcing or adding conductivity to polymeric composites.
Boron suboxide (B6O) sintered bodies were prepared by a solid state reaction and a hot pressing method. The thermoelectric properties of B6O were compared with those of B4C. The electrical conductivity was smaller than that of B4C, and the Seebeck coefficient was twice as large as that of B4C indicating p-type conduct…
This paper deals with the irradiation creep behavior of Zr-base alloys, both under normal operating and power transient conditions. The first part is devoted to the creep experiments, which were conducted in the OSIRIS or SILOE metallurgical test reactors using argon internally pressurized cladding tubes to simulate t…
Recent investigation of naturally coloured cottons have shown that brown cotton is very similar in morphology to white cotton while green cotton is different since it contains suberin. Suberin containing mainly bifunctional fatty acids can theoretically form a three dimensional network in the presence of glycerol, whi…
The effects caused by an excess quantity of ionized gas molecules within the low vacuum, variable pressure and environmental scanning electron microscope (ESEM) are described with reference to mechanisms by which they can influence imaging conditions. These effects can include specimen charging, recombination and deve…
This paper describes various parameters affecting to the (111) orientation in electroplating copper conductive layers. Control of this orientation is important because resistivity, stress, adhesion strength, and electromigration resistance of copper layer are affected largely by this orientation. This orientation cann…
Abstract Porphyrins are the most widespread of all prosthetic groups found in Nature. The ubiquity of their functions in Nature led researchers around the globe to focus their attention on these highly colored macrocycles. The interdisciplinary interest generated by porphyrins resulted in the syntheses of modified por…
A three-dimensional mathematical model was developed to investigate interactions between aerobic biofilms and a metal surface, and to clarify conditions under which the onset of localized corrosion caused by aerobic microorganisms is likely to occur. The model includes transport of seven chemical species by diffusion…
Orange phosphorescence from Eu 3+ ‐activated CaO and SrO and violet phosphorescence from Pb 2+ ‐activated SrO were clearly observed after the materials had been excited with ultraviolet light. The orange phosphorescence resulted from 5 D 0 to 7 F 1 transitions of the Eu 3+ ions and the violet from 3 P 0 to 1 S 0 trans…
Preferential nucleation of dynamic grains at triple junction (TJ) was investigated in copper tricrystal during high-temperature deformation. The nucleation of the dynamic grains at the TJ was observed at much lower strain than the peak strain where dynamic recrystallization (DRX) extensively took place. Further strain…