Materials Literature
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Terfenol-D is a magnetostrictive material with properties such as large strain, high force, wide bandwidth, and high energy density. Terfenol-D actuator, with its unique characteristics, is therefore potentially a new class of actuator most suitable for embedded actuator applications. This paper deals with the modelli…
The possibility of using interdigitated surface electrode patterns to improve the transverse actuation capability of electroceramic actuators is investigated. This pattern produces nonuniform electrical fields in the plane of the wafer which utilize the longitudinal piezoelectric effect to generate larger, more anisot…
The authors present results from electronic structure calculations of the intermetallic hydrides M 2 M'H 6 (M=Mg, Ca, Sr, M'= Fe, Ru, Os). Most of these hydrides have been recently synthesized and characterized, all showing the K 2 PtCl 6 cubic structure. They have determined their energy bands and densities of electr…
A dipole particle suspension device was fabricated by sandwiching rodlike TiOxNy particles dispersed in a poly(dimethylsiloxane) derivative between two indium-tin-oxide coated glass substrates. On applying and removing an electric field of 2 kV mm−1 with a frequency of 200 Hz, a reversible solar transmittance change a…
Common optical absorption features are observed near 0.5 eV in four undoped single-crystal copper oxides: ${\mathrm{La}}_{2}$${\mathrm{CuO}}_{4}$, ${\mathrm{Nd}}_{2}$${\mathrm{CuO}}_{4}$, ${\mathrm{Pr}}_{2}$${\mathrm{CuO}}_{4}$, and ${\mathrm{Sr}}_{2}$${\mathrm{CuO}}_{2}$${\mathrm{Cl}}_{2}$. These absorption bands are…
Abstract Interaction between polypropylene matrix and carbon black was examined by measuring physical, mechanical, and electrical properties. It has been shown that presence of carbon black influences the morphology and crystallinity of the matrix. Strong interaction was observed directly by electron microscopy and in…
Abstract Wood plastic composites (WPC) of simul were prepared by gamma radiation using butylacrylate (BA) and methylmethacrylate (MMA) as the monomer and methanol as the swelling agent at 9:1 (v/v) ratio. IR spectra of simul, bulk polymer of BA (or MMA) film, and WPC of different polymer loadings ranging from 18 to 11…
Abstract A prediction equation for thermal conductivity of polymer composites reported in our previous papers has been revised in terms of two view points: (1) estimation of thermal conductivity of a composite using an idea of reduced thermal conductivity; and (2) the effect of ease in forming conductive filler chains…
Highly porous biocompatible and biodegradable polymers in the form of cylindrical disks of 13.5 mm diameter were implanted in the mesentery of male syngeneic Fischer rats for a period of 35 days to study the dynamics of tissue ingrowth and the extent of tissue vascularity, and to explore their potential use as substra…
Scanning Electron Microscope (SEM) image simulation techniques have recently started to be used as a means of quantitative interpretation of SEM micrographs. A method of image simulation has been developed which takes into account image formation processes from the point of impact of the primary beam on the sample to…
Crystallization is an important process in a wide range of scientific disciplines including chemistry, physics, biology, geology, and materials science. Recent investigations of biomineralization indicate that specific molecular interactions at inorganic-organic interfaces can result in the controlled nucleation and g…
A model is presented to explain the formation and morphologies of surfactant-silicate mesostructures. Three processes are identified: multidentate binding of silicate oligomers to the cationic surfactant, preferential silicate polymerization in the interface region, and charge density matching between the surfactant a…
A high area density of field-induced electron emission sites has been observed on broad-area (12 mm in diameter) CVD diamond films deposited on molybdenum substrates. Furthermore, it was found that the density increased with the electric field applied to the surface of the films. These findings indicate that the CVD d…
Surface phonon spectra from Ta/Al Fibonacci multilayers are studied via Brillouin scattering. Determination of the frequency positions of the Rayleigh wave and the intensity dip corresponding to the longitudinal threshold has enabled us to extract two effective elastic constants C 44 and C 11 of the whole structure. T…
Abstract Reaction of tetrakis( p ‐allyloxyphenyl)porphyrin and perfluoroalkanesulfonyl bromides gives tetrakis( p ‐polyfluoroalkoxylphenyl) substituted porphyrins. The yields are over 90%. The synthesis of the metal ion complexes of these F‐containing porphyrins is also reported. Preliminary results on the study of th…
Abstract Since blending or alloying can provide new PVC‐based materials with tailor‐made properties, it would be interesting to review the general methods of studying this topic. This paper deals with the thermodynamics and miscibility testing methods of PVC‐based blends. Although a large amount of literature has been…
A lot of narrow lines on R 2 , R + , N 1 , N - and some other unknown centers have been observed in γ-rayed pure and doped sodium fluoride crystals in the temperature range of 9-77 K. The proper laser irradiation was used for strengthening the zero-phonon lines and the relative explanation was given. The spectral prop…
The final installment of a three-part paper on the subject of polymer additives. Some of the properties these additives bring to polymers are: anti-blocking agents, anti-fogging agents, antistatic agents, coupling and releasing agents, blowing and crosslinking agents, defoaming agents, emulsifiers, and heat stabilizer…
The growth pattern,morphology and ultrastructure of the tubes in Mastogloia cocconeiformis Grunow have been investigated by light and scanning electron microscopy and cytochemical tests, following the original discovery of the tube-dwelling habit of this diatom by John in 1990. Living samples from the subtidal stromat…
The pyrolysis of organic compounds were carried out and the magnetic properties of the obtained carbons were investigated. Polymer-derived carbons, perfomed as a preliminary study, still seen to be of paramagnetic nature, although the carbons shoned hysteresis even at room temperature. Next, the pyrolysis of organic m…