Materials Literature
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The effects of the thickness, uniaxial anisotropy field, electrical resistivity and addition of other elements on the frequency dependence of permeability in Fe-Zr-N films were investigated. Film thicknesses were varied up to 8 μm. The purpose of this study was to identify the main origin of the high-frequency loss in…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPolytetrafluoroethylene fiber-based composite antifriction coatingsAlexander S. KuzharovCite this: Ind. Eng. Chem. Res. 1993, 32, 5, 763–773Publication Date (Print):May 1, 1993Publication History Published online1 May 2002Published inissue 1 May 1993https://pubs.acs.org/doi/…
Abstract Toray's ionic‐type photosensitive polyimide, “Photoneece”, is widely used as an interdielectric and as a protection layer for microelectronics, because of its properties, such as the removal of photoreactive groups at low temperature, excellent thermal, mechanical and electrical film properties and excellent…
Buildup factors are reported for the absorbed dose in air resulting from point isotropic sources of monoenergetic photons with energies from 10 to 100 MeV. Factors were calculated from photon fluences computed by the EGS4 code for coupled photon and electron transport. Comparisons are made with results of moments meth…
Diatom taxa of the genus Mastogloia collected near Lee Stocking Island, Bahamas and in Shark Bay, Australia were observed to produce extracellular structures. The shape, arrangement, and number of these structures is species-specific and related to the number of partecta. Structures observed in 20 Mastogloia taxa incl…
The avoidance of condensation problems in the future depends on designers having available accurate and reliable vapour permeability values. The emergence of free trade within the European Community requires the transferability of measurement data between countries, as well as between individual laboratories. This pap…
Phase transitions of orthorhombic sulfur were investigated above 10 GPa by Raman spectroscopy using red light excitation. Transitions into several phases that have been reported in previous studies using green light excitation, are confirmed. The phase behaviour is observed to depend strongly on the preparation method…
The acetone-sensitized irradiation using UV-B (ultraviolet light, 280-320 nm; sunlamps) of thymidylyl(3'-->5')deoxyfluorouridine monophosphate produces two main photoproducts. The distribution of these photoproducts is dependent on the pH of the irradiation solution. At pH 6, the cis-syn cyclobutane-type photodimer is…
Sea ice algal assemblages in the arctic region are mainly represented by marine diatoms (Bacillariophyta), dominated by species of Navicula Bory, Pinnularia Ehrenberg, Gyrosigma Hassall and Pleurosigma W. Smith. The examination of historical and modern ice diatom collections reveals that Navicula kryophila, first desc…
Alumina and silica coatings have been deposited by MOCVD (Metal Organic Chemical Vapor Deposition) on alloys to protect them against high temperature corrosion. Aluminium Tri-lsopropoxide (ATI) and DiAcetoxyDitertiaryButoxySilane (DAOBS) have been used as metal organic precursors to prepare these ceramic coatings. The…
The nature of atomic bond-orientational anisotropy and order in liquids and glasses is considered based upon recent molecular dynamics studies. A possibility of spin-glass-like freezing of the local bond-orientational order (BOO) parameter is demonstrated. A close relationship between the anelasticity of metallic glas…
The thermodynamic properties of the Ti–W system have been assessed on the basis of the descriptions of pure Ti and W included in the Scientific Group Thermodata Europe database. The assessment method involves the use of models for the Gibbs energy of the various phases of the system, and interaction parameters in the…
This paper is composed of two parts: theoretical and experimental. The theoretical part is divided into several sections. The main characteristic properties of 3d (transition metals) and 4f (rare-earth metals) magnetism are explained in the second section. The properties of rare-earth-transition metal compounds are di…
Summary Natural corrosion crusts on potash—lime—silica glasses, that have been buried in soil for very long periods, were examined using infra‐red reflectance microspectroscopy and electron‐probe techniques. Individually these techniques are useful: infra‐red provides information on which functional groups are present…
The discrete phonon spectra of TiO2 quantum dot with a dipole layer is reported. The absorption intensities of different LO phonons are related to the phonon-electron coupling in accord with the prediction of the continuum polarization model. The two-phonon bound state appeared due to the localization effect. The opti…
A microscopic model is developed to describe statistical properties of a nematic phase consisting of semiflexible dimers. The effect of the spacer chain bonding the two mesogens is described by the local conditional probability in terms of a bare stiffness parameter Ω∼EB/kT and a bare equilibrium angle θ0 between meso…
Film thickness and temperature are two of the most important quantities in semiconductor manufacturing. They play a fundamental role in many standard production techniques like chemical vapor deposition (CVD, LPCVD, PECVD), thermal oxidation and diffusion. They are especially important for more recently developed tech…
Potentiodynamic testing was used to study the corrosion performance of low-residual carbon steels in a sour brine, as typically encountered in Kuwaiti oil fields. Twenty-eight tests were performed to determine the effects of variations of carbon content from 0.1 to 0.4%; 1, 2, and 3% additions of cobalt; and 1, 2, and…
Various methods are discussed for the joining of ceramics to metals and vice versa. State‐of‐the‐art techniques including refractory metallizations and active metal brazing are detailed from both a processing and applications standpoint. Various approaches to forming ceramic/metal joints or thin film coatings have bee…
Since the discovery of the organic superconductivity more than 10 years ago with a critical temperature (TS) of 1 K in quasi one dimensional (1D) conductors based on the tetramethyltetraselenafulvalene molecule, more than 40 organic superconductors are now known, achieving TS up to about 13 K. These salts are made of…