Materials Literature
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The self-assembled two-dimensional random networks composed of isolated SWNTs are obtained by a simple floating catalyst CVD method. A remarkable advantage of this technique is that the random networks can be formed at relatively low temperature with a wide density range, which is distinct from the previous reports. W…
Abstract Size sorted magnetic nanoparticles based on copper ferrite have been chemically synthesized. Their magnetic properties have been investigated at low temperature using Mossbauer spectroscopy and magnetisation measurements. The thermal variation of the magnetization is strongly affected by finite size and surfa…
Abstract This paper reviews the utilization of waste rubber and waste plastics for the preparation of thermoplastic elastomers (TPEs). TPEs based on ground rubber tire (GRT), waste EPDM rubber, waste nitrile rubber, recycled rubber, latex waste, and waste plastics are described with respect to composition and physical…
Hot deformed magnets can be commercially produced from hyper-stoichiometric nanocrystalline Nd-Fe-B compositions. This paper summarizes the influence of the rare-earth component (Nd, Pr, Dy) and gallium to magnetic properties and hot workability of die-upset magnets based upon hyper-stoichiometric compositions. Increa…
Thin cadmium sulfide (CdS) films (100–130 nm) are deposited on glass from an alkaline solution. The films are annealed in air, in the vicinity of a CdCl 2 source, at different temperatures (280–400°C) and for different time periods (below 75 min). The change in some of the optoelectronic parameters (resistivity, direc…
The ferritic-austenitic duplex-steels have a very complex precipitation and transformation behaviour, which requires professional treatment. Especially the precipitation of the {sigma}-phase causes considerable changes with regard to the mechanical as well as the corrosive properties, which are to be considered during…
Thermal stability and the effectiveness of coatings for high-temperature magnets are assessed. Based on several years of experiments and observations, these high-temperature magnets are determined to be metallurgically stable at temperatures up to 550/spl deg/C. These uncoated high-temperature magnets, held at 300/spl…
Investigations of the oxidation behavior of Sm(Co, Fe, Cu, Zr)/sub z/-type high temperature permanent magnets are of particular importance for the assessment of their stability under application conditions in the temperature range up to 500/spl deg/C. Sintered magnets of the Sm/sub 2/Co/sub 17/-type were studied regar…
A fine grain, relaxor-based piezoelectric ceramic 0.7 Pb(Mg(1/3)Nb(2/3))O3-0.3PbTiO3 (PMN-30% PT) has been investigated, which was fabricated using the columbite precursor method. The complete set of electromechanical properties of the piezoceramic at room temperature is determined using a combination of ultrasonic an…
This paper provides an introduction to and a summary of the remaining papers in this issue of Nuclear Technology. The papers in this issue present the important results from a U.S. Department of Energy–sponsored Nuclear Engineering Research Initiative (NERI) project to study the efficacy of the thorium-uranium dioxide…
Dense single-wall-carbon-nanotube-(SWCNT)-reinforced alumina nanocomposites have been fabricated by a novel spark-plasma-sintering technique. Anisotropic thermal properties have been found in carbon nanotube composites. The introduction of ropes of SWCNTs gives rise to a decrease in the transverse thermal diffusivity…
We investigated the oxidation kinetics of SiC materials in the form of powders (average dimension 4 μm) in the temperature range 1100°–1500°C in dry air. The oxidation process was monitored through the relative mass gain in a thermobalance. As the specific surface area of the particles was measured, the recorded mass…
A set of numerical models for two-dimensional self-organization of nanoparticles in a liquid film is developed and numerical simulations are carried out to investigate the relationship between process conditions and structures of self-organized nanoparticles. The two-dimensional Langevin equation is employed to track…
Studies on psychrophilic enzymes to determine the structural features important for cold-activity have attracted increased attention in the last few years. This enhanced interest is due to the attractive properties of such proteins, i.e. a high specific activity and a low thermal stability, and thus, these enzymes con…
The chemistry and composition of empressite, AgTe, a rare silver telluride mineral, has been mistaken in the mineralogical literature for the silver telluride stützite (Ag 5-x Te 3 ). Empressite from the type locality, the Empress-Josephine deposit (Colorado), occurs as euhedral prismatic grains up to 400 μm in length…
In this study, the relation between pressure values and the feeling of pressure of the top part of men's socks (hereafter, the top) is investigated to design and develop socks that provide wearing comfort. Leg size, tensile properties and pressure values of the top are measured, and the pressure feeling is evaluated.…
BaFeO/sub 3/ (BFO) epitaxial thin films on [001] SrTiO/sub 3/ substrates have been successfully produced by pulsed laser beam deposition. The epitaxially grown BFO was found to have tetragonal crystal structure with some amount of oxygen deficiencies. The magnetic susceptibilities of the samples strongly depended on t…
Abstract Summary: The theory of lamellar superstructures of an ABC 3‐miktoarm star terpolymer in the conditions corresponding to the strong segregation limit for linear ABC triblock terpolymer has been developed. According to the particular molecular topology (namely, the common junction point for all three blocks), t…
Noise suppression effect of Co-Pd-Al-O nanogranular thin films, which have considerably high permeability up to gigahertz range, was investigated. The films with large variety of electrical resistivity (/spl rho/) from 10/sup 2/ to 10/sup 7/ /spl mu//spl Omega//spl middot/cm were prepared by reactive sputtering method…
The reaction of ethanol has been investigated on the surface of Au–Rh/CeO2 by temperature programmed desorption (TPD), infrared spectroscopy and in steady state conditions. Most of adsorbed ethanol is found in the form of ethoxides (ν O–C at 1045 and 1096 cm−1). Heating the surface resulted in the transformation of et…