Materials Literature
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This paper presents a finite-element model for the free vibration analysis of a shape memory alloy (SMA) surface laminated composite cantilever plate. The proposed device is considered to undergo small displacements and small strains. The governing equations are developed utilizing the first-order shear deformation th…
The relationships between incommensurability, charge ordering and magnetic and electric transport properties were studied in La₀.₃₃Ca₀.₆₇Mn₁₋ᵧFeᵧO₃ (0 ≤ y ≤ 0.06) polycrystalline samples. Incommensurability and charge ordering were directly observed by electron diffraction versus temperature and lattice imaging at low…
We report the observation of sudden and dramatic changes in single-bubble sonoluminescence (SBSL) intensity (i.e., radiant power, phi(SL)) and spectral profiles at a critical acoustic pressure (P(c)) for solutions of sulfuric acid (H2SO4) containing mixtures of air and noble gas. Nitric oxide (NO), nitrogen (N2), and…
Abstract— The photoaligning properties of the popular photoaligning material polyvinyl‐4(fluorocinnamate) (PVCN‐F) are presented. The aligning quality and azimuthal and zenithal anchoring energy were measured and the drift of the easy orientation axis (gliding effect) on the PVCN‐F surface, depending on UV exposure, w…
We perform a full-wave analysis of a stackable lens proposed in a recent paper [Ramakrishna et al., J. Mod. Optics 50, 1419 (2003)]. This lens was suggested for improving subwavelength imaging and can be obtained by splitting a single-layer lens into a set of thinner layers. Our analysis shows that (i) such a lens, wh…
Ga2O3 thin films were deposited at 200°C on p-type Si (100) by plasma-enhanced atomic layer deposition technique with an alternating supply of reactant source, [(CH3)2GaNH2]3, and high-power oxygen plasma of 180 W. The as-deposited thin films were annealed at 500, 700, 900°C in oxygen ambient for 10 min in a rapid the…
Shape memory alloy (SMA) materials possess complete superelasticity or pseudoelasticity above the austenite finish temperature (Af) and many unique mechanical, thermal, thermal-mechanical and electrical properties compared with other conventional materials. Many studies have reported that the superelastic and hysteres…
Experiments have shown that the mechanical response of shape memory alloys is highly sensitive to the loading rate. The origin of this rate-dependent behavior, however, is not the usual viscoelastic effect, but rather it arises from the complex coupling that exists among stress, temperature, and the rate of heat gener…
Tethering of growth factors to biomaterial substrates via a polyethylene glycol (PEG) spacer has been established as a means of controlling dosage and conformation of the protein at the material surface, while retaining biological activity. However, the extent of modification through a comparison of bound versus unbou…
A polymer-bound dirhodium complex, [{Rh2(O2CCH3)3(Ds-pip)}n(O2C-P)], was prepared via ligand exchange of [Rh2(O2CCH3)4] with the side chains of a methyl methacrylate/methacrylic acid copolymer (O2C-P) followed by axial coordination of the fluorophore, N-dansylpiperazine (Ds-pip). Emission from Ds-pip is quenched when…
In the case of typical gas sensors responding by gas adsorption on the surface, it is very difficult to detect inert gases which have low chemical adsorption energies under normal conditions. Carbon nanotubes (CNTs) are well known as electron emitters in applications like field emission displays. In this work, we fabr…
BPT propyl ester (propyl 2-(3-cyano-4-(2-methylpropoxy)phenyl)-4-methylthiazole-5-carboxylate) was synthesized, and the solvent effect in the polymorphic crystallization of the BPT propyl ester was investigated. The rapid-cooling crystallization was carried out from ethanol (EtOH), acetonitrile (MeCN), and cyclohexane…
We have attempted to control the helical pitch of a chiral nematic liquid crystal by the use of a photoresponsive chiral metal complex. For this purpose, a novel Ru(III) complex [Ru(acac) 2 (L)] was synthesized, where acac and L denote acetylacetonato and 1,3-bis-{4-[6-(4-phenylazo-phenoxy)-hexyloxy]-phenyl}-propane-1…
Effects of compressive stress on the dielectric properties of PMN–PT ceramics were investigated. The ceramics with the formula (1 − x )Pb(Mg 1/3 Nb 2/3 )O 3 -( x )PbTiO 3 or (1 − x )PMN–( x )PT ( x = 0.1–0.5) were prepared by a conventional mixed-oxide method and then characterized with x-ray diffraction (XRD) and sca…
In this study, shape memory alloy damper with characteristics of pseudoelastic hysteresis for helicopter rotor blades are investigated. SMAs can be available in damping augmentation of vibrating structures. SMAs show large hysteresis in the process of pseudoelastic austenite-martensite phase transformation which takes…
Inductively coupled plasma reactive ion etching of GeSbTe (GST) thin films with a photoresist mask was carried out in a Cl2/Ar gas. The monotonous increase in etch rate with increasing Cl2 concentration indicates that the etching of GST films obeys the reactive ion etching mechanism. The etch rates increased with incr…
A sufficiently high DC component in the current on the secondary side of a transformer causes distortion of the primary side current. Prediction of such distortion relies on the availability of magnetisation curves that extend deep enough into saturation. A simple test, carried out at rated voltage, is proposed which…
Simple solution analysis of the formation mechanism of complex BaSO(4) fiber bundles in the presence of polyacrylate sodium salt, via a bioinspired approach, is reported. Titration of the polyacrylate solution with Ba(2+) revealed complex formation and the optimum ratio of Ba(2+) to polyacrylate for a slow polymer-con…
(Bi0.5Na0.5TiO3)0.94(BaTiO3)0.06 (BNBT-6) ceramics without additives and BNBT-6 ceramics with 0–0.8 mass% MnO2 were produced by a conventional ceramic fabrication technique. The effect of MnO2 addition on the pyroelectric coefficient, P, is investigated in detail. The figure of merit, F D, for specific detectivity of…
High-frequency magnetic and attenuation properties of ferrite/polymer composites were investigated for undoped and V 2 O 5 doped W -type barium ferrites, BaCo x Zn 2− x Fe 16 O 27 , with x = 1.0, 1.3 and 1.5. The results show that, as compared to the undoped samples, the permeabilities and are increased by about 50% a…