Materials Literature
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Presents the objective evaluation of a stabilized garment parts handle, based on determination of mechanical and physical properties of fabrics using the Kawabata Evaluation System. Parameters that influence the handle are shown on the basis of 16 parameters of mechanical and physical properties of shell fabric, inter…
Abstract We have observed that methacrylic acid (MA) is far more corrosive than acrylic acid (AA) on copper surfaces when copper was exposed to the vapor of these two acids at ambient temperature and environment. With the aid of modern surface‐sensitive instrumentation, which included grazing angle Fourier transform i…
The influence of γ-, electrons and reactor neutrons irradiation on the optical and electrophysical properties of Gd3 Ga5 O12 single crystals is investigated. Experimental data and theoretical estimations of radiation defect concentration are compared.
Abstract The surface of hot‐dip galvanized steels is a complex system highly dependent upon the composition of the galvanization bath and upon surface treatments such as degreasing, alkaline etching and chromate conversion. In this study, industrial zinc‐coated samples are subjected to degreasing, alkaline etching and…
The physical significance of the first diffraction peak in glassy Se is discussed in the light of recent experimental results regarding the temperature dependence of the parameters characterizing the first peaks in the elastic S(Q,\ensuremath{\omega}=0) and static S(Q) structure factors. The rather different behavior…
Trifluoroacetic acid and ZnCl2 have been used as the initiating system for the living cationic polymerization of β-(vinyloxy)ethyl cinnamate (VEC). In contrast to a previous initiating system [EtAlCl2 and 1-(isobutoxy)ethyl acetate], the use of the new system led to excellent agreement between the molar masses of PVEC…
A new optically active (R)-3-ethylmercapto-2-methylpropionic acid has been synthesized using D(-)—2,10-camphorsultam as a chiral auxiliary. The optical purity of the acid obtained was greater than 98 per cent. Its derivatives, (R)-4-(3-ethylmercapto-2-methylpropionyl)phenyl 4′-alkoxybiphenyl-4-carboxylates (EMMPPmBC;…
Porous silica glass was prepared by sol-gel process from tetraethoxysilane (TEOS). The effects of solvents (water, ethanol), drying condition, heat treatment temperature on specific surface area and pore size distribution of porous silica were investigated. Gelation process accelerates with an increase of H2O content,…
Pd and its fee substitutional alloys which form hydride phases exhibit hysteresis. If Pd-Ni alloys have been hydrided and then dehydrided a number of times at a moderate temperature, the hysteresis is reduced. The reduction of hysteresis increases with increase of X Ni to 0.15 and, if the X Ni = 0.15 alloy is hydrided…
Elastic recoil detection analysis (ERDA) was performed to determine hydrogen concentration profiles near the (100) surfaces of epitaxially grown diamond films. Microwave plasma chemical vapor deposition (CVD) was used for the growth. At the end of the growth, the substrates were treated with and without exposure to H…
The dislocation loops in rutile produced after irradiation by 0.4-1 MeV electrons at various temperatures have been analyzed. Loops formed during electron irradiation at 400°-500°C were pure edge interstitial of the type <100>{100} and were unfaulted. After leaving rutile specimens irradiated at high temperature for a…
Single crystal-silicon quantum wells with SiO2 barriers have been grown from SIMOX silicon-on-insulator substrates. Photoluminescence in the red and near-infrared is observed for average well width &lt;8 nm, with peak signal for 2-nm average width. The luminescence spectrum is independent of well width for SiO2 ba…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAn Insect Antifeedant Limonoid from Turraea niloticaMichael D. Bentley, Geoffrey O. Adul, A. Randall Alford, Fu-Yung Huang, Leslie Gelbaum, and Ahmed HassanaliCite this: J. Nat. Prod. 1995, 58, 5, 748–750Publication Date (Print):May 1, 1995Publication History Published onlin…
Both one-dimensional two-phase Stefan problems with the thermodynamic equilibrium condition $\theta (R(t),t) = 0$, and with the kinetic rule $\theta (R(t),t) = - \varepsilon \dot R(t)$ at the moving boundary $x = R(t)$ are considered. We study the properties of the regular solutions of the problem with equilibrium con…
The title compounds have an isotypic averaged structure but differ in significant detail with respect to disorder. Disorder diffuse scattering has been studied in situ up to 1150 K with a heating camera and X-ray films and an image-plate system at the synchrotron source Deutsches Elektronensynchrotron/HASYLAB. With th…
Abstract The mechanism of reinforcing rubber with carbon black particles is investigated by comparing the strain energy density functions of pure and reinforced rubbers. Finite deformation biaxial extension experiments are used to measure the strain energy density. The functional form of the reinforced system, which h…
Surface electrode patterns with systematic changes of electrode gap distances and widths have been developed to investigate the averaging effect in the current-voltage ( I-V ) measurements of ZnO varistors. Varistor breakdown voltages, V B , and the nonlinear exponent, α, were obtained from the I-V measurements. The α…
An approach to the R ‐curve behavior of 2‐D woven ceramic matrix composites is proposed. This approach takes into account the presence of a process zone at the crack tip. The strain energy release rate is determined using an equivalent system of two specimens free of process zones. The process zone size is determined…
The penetration performance of uranium alloy kinetic energy (long rod) projectiles are superior to that of equivalent projectiles manufactured from high-density tungsten-based composites. Prior research efforts seeking improvements in the penetration capabilities of tungsten penetrator materials have focussed on incre…
Alloys of Dy0.73Tb0.27Fe2−xNix [0≤x≤2] were prepared and the lattice parameters obtained at room temperature showed a deviation from Vegard’s law owing to the presence of magnetovolume effect. Magnetization studies were carried out up to an applied field of 10 kOe in the temperature range 4.2–750 K. Magnetization data…