Materials Literature
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We researched the realization of novel optical functions of glass by combining an external electromagnetic field induced electronic structure and rare-earth-ions. We reviewed the phenomena, mechanisms, and the applications of photostimulated luminescence induced by X-ray, long-lasting phosphorescence by ultra-violet l…
Deracemization of a racemic mixture of Δ- and Λ-[Co(acac)3] (acac = acetylacetonate) took place with a chiral ruthenium(II) complex, Δ-[Ru(menbpy)3]2+ (menbpy = 4,4′-bis{(1R,2S,5R)-(−)-menthoxycarbonyl}-2,2′-bipyridine), under visible light (420 < λ < 470 nm) irradiation in the presence of either triethylamine or NaOH…
This study examines the exceptionally high activation energies estimated fi om data obtained from various composites exhibiting high strain rate superplasticity and loaded at ultrahigh temperatures near or slightly above the solidus. It is shown that the activation energies for the 6061 composite and for Al 6061 and 1…
Corrosion behaviors and its countermeasures of copper used for building materials such as roofs and water supply systems in detached houses, apartments and buildings have been reviewed. The corrosion phenomena of pitting corrosion, erosion corrosion and cuprosolvency troubles are discussed based on both empirical data…
Short review of bioferroelectricity and related problems is presented. One of the important cases the hydrogen-bonded systems, are analysed in detail. The proposed model describes the soliton-like dynamics of hydrogen-bonded ferroelectrics with two interacting subsystems (protons and ordered ferroelectric) in the vici…
We have prepared TTM-TTP-based (TTM-TTP = 2,5-bis[4,5-bis(methylthio)-1,3-dithiol-2-ylidene]-1,3,4,6-tetrathiapentalene) organic conductors with 1 ∶ 1 composition including tetrahedral anions in order to elucidate electronic properties of half-filled conductors. We have obtained three new 1 ∶ 1 composition salts (TTM-…
We demonstrate the electromigration threshold, or the so-called short-length effect, in single-damascene copper interconnects with SiO/sub 2/ dielectrics. With standard electrical lifetime measurements and a simplified equation based on the Blech model, the length-dependent electromigration behavior is studied quantit…
Substitution of Dy rare earth ions in Ba(Ti, Zr)O3 dielectric materials was studied, using X-ray diffraction. Dy3+ ions enter both the A- and B-sites of the perovskite structure, depending on whether there is a Ba or Ti-excess. There are two discrete mechanisms of occupancy: 1) all Dy ions enter only Ti-sites as accep…
The influence of surface energy and structural properties of carbon coated polyethylene (PE) on the human platelet adhesion was studied. Three types of amorphous carbon coating were obtained by plasma pulse discharge, with the number of pulses grading as 10, 50, 100. Human serum albumin adsorption experiments have bee…
Polyolefin plastomer films formulated with slip and antiblock were blown on a wide die gap with and without two DynamarTM polymer processing additives (PPAs). A wide die gap was used so that melt fracture-free film could be obtained with no PPA present for comparison purposes. The films were analyzed for the following…
Raman spectra of layered intercalation compounds FexNbS2 (0.159 ≤ x ≤ 0.325) are measured at room temperature. When the hydrostatic pressures are applied to the sample with x = 0.239, the phonon energies are increased linearly with increasing the pressure up to 7.7 GPa. We revealed that the A1g mode at 170.4 cm—1 and…
More than 150 t of diamond grits (China makes and uses about half of the world supply) are consumed each year in sawing constructional materials (eg concrete, granite, marble). These diamond grits are typically synthesised under high pressure and high temperature with graphite as the source material and a molten metal…
In this research, the effect of isothermal physical aging on creep behavior of stainless-fiber/poly-phenylene ether (PPE) composites was investigated. Metal-fiber/PPE composites are non-crystalline thermoplastics and often used in engineering plastics, which have been developed for Electro-Magnetic-Interference (EMI)…
In this paper, the friction and wear behavior of a carbon composite is studied. Friction tests were performed under constant friction mode. The power inputs were increased gradually to study their effects on friction transition at ambient air environment. Friction surfaces were examined using various macro and nanosco…
The effects of temperature and strain rate on elongation of Al–4.5Mg alloy were investigated at 10−4–10−2 s−1 and at 573–773 K . The elongation depended on the temperature and strain rate even in the solute-drag creep region; as a result, a large elongation of 352% was attained at 653 K and at 10−3 s−1. Necking develo…
A comprehensive testing programme was undertaken to evaluate the effects of irradiation, thermal ageing, specimen orientation, and test temperature on the fracture oughness and tensile behaviour of a Type 309L/308L stainless steel strip clad deposit. Specimens were irradiated in the high flux reactor (HFR) Petten to n…
The Accelerator Production of Tritium (APT) project proposes to use a 1.0 GeV, 100 mA proton beam to produce neutrons via spallation reactions in a tungsten target. The neutrons are multiplied and moderated in a lead/aluminum/water blanket and then captured in 3He to form tritium. The materials in the target and blank…
Yttrium-iron garnet, Y3Fe5O12 (YIG), is formed via the peritectic reaction of YFeO3 (YIP) and liquid phases. The direct growth of YIG from a highly undercooled melt with stoichiometric YIG composition was studied using an aero-acoustic levitator with a CO2 laser heating system. Although a YIG droplet was successfully…
Full size and sub-size tensile test specimens were machined from well characterized, specially cast, alloy 718 test material. Hydrogen was charged into the test specimens by the exposure to a pure 100 bar hydrogen atmosphere at 600 O C during 24 hours, leaving 35 ppm H in the full size test bars and 6 ppm in the sub-s…
2-(N-pyrrolyl)ethylvinyl ether (2-NEVE) was synthesized from 2-chloroethylvinyl ether (2-CEVE) via a phase catalysis reaction. Cyclic voltammetric studies were carried out to check for the electroactivity of 2-NEVE. Poly(2-(N-pyrrolyl)ethylvinyl ether) [poly(2-NEVE)] was synthesized via chemical methods. Graft copolym…