Materials Literature
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A new analytical model of high-speed friction was developed to account for the observed velocity dependence in sliding friction at high speeds and was successfully applied to the analysis of data previously reported by Jones et al. for a number of concrete penetration tests using ogive-nose projectiles of high-strengt…
Addition of Y 2 O 3 as a sintering additive to porous β‐SiAlON (Si 6− z Al z O z N 8− z , z = 0.5) ceramics has been investigated for improved mechanical properties. Porous SiAlON ceramics with 0.05–0.15 wt% (500–1500 wppm) Y 2 O 3 were fabricated by pressureless sintering at temperatures of 1700°, 1800°, and 1850°C.…
This paper represents a continuation of the work published by Boardman et al., who concluded that the mechanisms of lime stabilisation were distinctly different for two clays of different mineralogy: English china clay, for which short-term flocculation is dependent on pH and long-term strength is dominated by the pro…
The effects of a decreasing top electrode size on the electric and piezoelectric properties of tetragonal Pb(ZrX,Ti1−X)O3 thin films are investigated. The effective piezoelectric small-signal coefficient d33,eff and the piezoelectric large signal-strain S are measured using a double-beam laser interferometer. Both pro…
Abstract Electrochemical impedance spectroscopy (EIS) has become an important tool in Solid State Electrochemistry. Simple Kramers-Kronig transform data validation assures selection of high quality data for subsequent CNLS-fit analysis. Optimized starting parameters and probable equivalent circuit can be obtained thro…
The magnetoelectric effect in ferrite-piezoelectric composites is considered. A theory of the magnetoelectric effect in the electromechanical-resonance region for disk-shaped samples is presented. The magnetooptical coefficient is calculated for longitudinal and transverse orientations of electric and magnetic fields.…
In this paper we extend the phase-field model of crystallographic slip of Ortiz (1999 J. Appl. Mech. ASME 66 289–98) and Koslowski et al (2001 J. Mech. Phys. Solids 50 2957–635) to slip processes that require the activation of multiple slip systems, and we apply the resulting model to the investigation of finite twist…
Effective use of surfactants for corrosion inhibition requires appropriate information about the application environment and metal as well as the properties of the surfactant. Surfactant adsorption, which is a prerequisite to corrosion inhibition by surfactant molecules, is dependent on the properties of the surfactan…
The tensile and stress‐rupture behavior of SiC/SiC minicomposite containing a chemically vapor deposited (CVD) ZrO 2 interphase was evaluated. Fractographic analyses showed that in situ fiber strength and minicomposite failure loads were strongly dependent on the phase contents and microstructure of the ZrO 2 interpha…
The interfacial effects are critical to understand the nanocomposite behavior based on polymer matrices. These effects are dependent upon the morphology of carbon nanotubes, the type of used polymer and the processing technique. Indeed, we show that the different parameters, as the eventual surfactant use, the ultraso…
Phosphorus-doped Si 0.8 Ge 0.2 thin films were deposited on the Si 3 N 4 /SiO 2 /Si substrate by the RF sputtering. Thermal annealing was carried out to crystallize as-deposited, amorphous-like SiGe thin films. With increasing annealing temperature and time, the crystallization of the SiGe thin films progressed, resul…
The present paper describes recent developments in the employment of ITO (In2O3:Sn) nanoparticles for the preparation of transparent conducting coatings and discusses capabilities and limits of this approach, especially for applications in display and smart window technology. Meanwhile, redispersible nanoparticles of…
The fundamental mechanism of room-temperature grain growth during self-annealing in electroplated Cu films has been an issue of great interest. We have investigated the microstructure evolutions in a variety of electroplated Cu films prepared with different plating rates and their correlation with the crystalline defe…
With thousands of machines monitored for as long as 25 years with the same method, on-line partial discharge (PD) testing has become a recognized, proven tool to help maintenance engineers identify which stator windings need off-line testing, inspections and/or repairs. With over 63,000 test results acquired with the…
The nanosecond photoluminescence (PL) dynamics of neutral oxygen vacancy (NOV) defects at 410–460nm, and less pronounced nanocrystallite Si precursor (E′δ) defects at 520nm in multi-energy silicon-ion-implanted SiO2 (SiO2:Si+) are investigated. The density of NOV defects in as-implanted SiO2:Si+ of 8×1016cm−3 (or 2.5×…
In this paper, the twisting principles of Solospun and ring spinning are compared and analyzed. A geometric model is used to analyze the structure of Solospun yarns in order to determine why they are less hairy than ring spun yarns. Finally, a series of tests proves the conclusions.
The Abraham solvation parameter model is used to calculate the numerical values of the solute descriptors for 2-methoxybenzoic acid and 4-methoxybenzoic acid from experimental solubilities in organic solvents. The mathematical correlations take the form of [Formula: see text] [Formula: see text] where C S and C W refe…
Thin-film transistor liquid-crystal displays are systems widely used to support full-featured multimedia. For such systems, backlight is a major source of power dissipation. This article introduces a backlight power management framework and explores trade-offs in the extended dynamic-luminance-scaling design space in…
Nanocrystalline zinc titanate (ZnTiO 3 ) was synthesized at low temperatures through the combination of a sol–gel processing and a polymer binder method. ZnTiO 3 powders of ∼5 nm in size were obtained by heating pastes, which were composed of a Zn‐Ti methanolic solution containing acetylacetone and an organic polymer…
The pyroelectric coefficients of 0.72Pb(Mg1∕3Nb2∕3)O3-0.28PbTiO3 (PMN-28PT), 0.67Pb(Mg1∕3Nb2∕3)O3-0.33PbTiO3 (PMN-33PT), and 0.92Pb(Zn1∕3Nb2∕3)O3-0.08PbTiO3 (PZN-8PT) single crystals, oriented and poled along three different crystallographic directions, [001]C, [011]C, and [111]C, have been measured using a dynamic me…