Materials Literature
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Abstract Ti-35Nb-7Zr-5Ta rods containing 0.06, 0.46, and 0.68 wt.% oxygen were produced by vacuum arc melting and forging. These were solution treated (ST) and aged in the temperature range of 427–593°C for 8 h followed by air cooling. Increasing oxygen content increased the ST yield strength (YS) from 530 to 1081 MPa…
Abstract Howmedica developed the Titanium-12Molybdenum-6Zirconium-2Iron beta titanium alloy (also known as TMZF® beta titanium alloy) in the late 1980s. Two patents were issued for this high strength, low modulus, ductile, biocompatible, titanium base alloy [1,2]. The mechanical properties for wrought machining and fo…
We have developed a new design of optical spectrometer based on the use of a chirped holographic grating inscribed on a flat substrate. This type of grating has a surface modulation with a spatially varying period. The ability of the chirped grating to focus a beam is exploited to reduce significantly the physical dim…
Abstract The performance of two types of Duplex claddings irradiated to very high burnup in a German high duty pressurized water reactor (PWR) has been studied. Four fuel rods with Duplex cladding were moved from two discharged assemblies to a low-burnt assembly for further irradiation. These rods were finally unloade…
Abstract In the preservation of cultural heritage items, the use of polymeric materials for the consolidation and protection of artifacts with historical and artistic value is widely accepted. This area is vast and includes studies of various objects made of different materials such as wood, stone, textiles, and paper…
The first gas insulated transmission line installed in the US was at the PSEG Hudson Generating station in New Jersey in 1972. The GIL is direct buried connecting the AIS substation equipment to a transformer located remote from the substation. This installation is still energized and in use today. The GIL technology…
We report the formulation of an ABCD matrix for reflection and refraction of Gaussian light beams at the surface of a parabola of revolution that separate media of different refractive indices based on optical phase matching. The equations for the spot sizes and wave-front radii of the beams are also obtained by using…
Abstract Titanium-35Niobium-7Zirconium-5Tantalum beta titanium alloy (also known as TiOsteum® beta titanium alloy) is a new metallic biomaterial that was designed to have outstanding osseointegratabilty, good mechanical strength, improved ductility, very low elastic modulus, and good hot and cold workability [1]. In t…
Abstract The influence of network topology on tensile strength at elevated temperature of natural rubber compounds vulcanized with different systems was studied. The tensile strength behavior of natural rubber at high strain is attributed to the capacity to crystallize on stretching. Variation of this property with th…
The two-component system octyloxycyanobiphenyl (8OCB) + decyloxycyanobiphenil (10OCB) has been studied by means of modulated differential scanning calorimetry as well as optical microscopy. The general trends of the phase diagram are similar to the two-component system octylcyanobiphenyl (8CB) + decylcyanobiphenil (10…
In this research, a conventional propylene glycol-based unsaturated polyester is synthesized and modified with diphenylmethane-4,40-diisocyanate (MDI), which leads to the formation of a hybrid polymer network (HPN). The effect of this modification on the mechanical properties is studied experimentally. The optimum mol…
Abstract Titanium-15Molybdenum beta titanium alloy is a generic alloy that has been around for a long time, but has never found wide use in the aerospace industry. Beta titanium alloys, in general, and corrosion-resistant biocompatible titanium alloys, in particular, attracted a lot of attention in the medical and sur…
Abstract The volume resistivity and percolation thresholds of carbon black (CB) filled polypropylene (PP), PP/epoxy, and PP/epoxy/glass fiber (GF) composites were measured. The morphology of these conductive polymer composites was studied with scanning electron microscopy (SEM). The effects of the GF and epoxy content…
The catalytic partial oxidation of methane on Ni−MgO solid solutions supported on metal foams has been studied at temperatures from 600 to 800 °C, 1 atm, 3000−19 000 mL/g−h, CH 4 /O 2 = 2/1. The catalysts were prepared in two ways: (a) oxidized foams were dipped directly into a citrate/ethylene glycol solution contain…
Infrared spectroscopic ellipsometry (IRSE) and visible monochromatic ellipsometry (VISE) approaches were applied to investigate the chemical structure and thickness of ultrathin polymer films. Mixed polystyrene-poly(2-vinylpyridine) and polystyrene-poly(tert-butyl acrylate) polymer grafted films (mixed brushes) with g…
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTStructure Formation of Polystyrene-block-poly(γ-benzyl l-glutamate) in Thin FilmsSabine Ludwigs, Georg Krausch, Günter Reiter, Magdalena Losik, Markus Antonietti, and Helmut SchlaadView Author Information Physikalische Chemie II und…
Pro-Hyp-Gly is a characteristic amino acid sequence found in fibrous collagens, and (Pro-Hyp-Gly)(10), which has been widely used as a collagen-model peptide, forms a stable triple-helical structure. Here, we synthesized polypeptides consisting of the Pro-Hyp-Gly sequence by direct poly-condensation of (Pro-Hyp-Gly)(n…
2,3,4,5-Tetrahydro-1,3,3-trimethyldipyrrin (1) is a crucial building block in the rational synthesis of chlorins and oxochlorins. The prior 5-step synthesis of 1 from pyrrole-2-carboxaldehyde (2) employed relatively simple and well-known reactions yet suffered from several drawbacks, including limited scale (>/= 0.5 g…
Abstract A number of factors influence the efficiency and the economics of the separation of dispersed liquid drops in an immiscible liquid–liquid mixture. One important factor that controls the performance of a filter medium in the separation is the fiber size. Electrospun polymer nanofibers have diameters in the nan…
Abstract The main objective of this study was to develop new, low cost, chemical antistripping additives that have low negative effects on Hot-Mix Asphalt (HMA) properties such as stability and low temperature cracking potential. To achieve this objective, HMA specimens were prepared using limestone aggregate, asphalt…