Materials Literature
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The end use requirements for standard ASTM F 562 wire for pacing leads present difficult challenges to achieve the desired performance of these permanent implant devices. It will be shown that an optimized process produces a measurable improvement in surface finish and greatly improved fatigue life of wire forms under…
In this study, new organic-inorganic hybrid composites were prepared by means of an in situ sol-gel process. The polymer used as the continuous phase was the metallocene polyethylene-octene elastomer (POE) or the acrylic acid grafted polyethylene- octene elastomer (POE-g-AA). The silica forming the inorganic phase was…
On propose un modèle de comportement prenant en compte les couplages thermomécaniques qui accompagnent le changement de phase dans une éprouvette monocristalline de CuZnAl. Cette modélisation met en avant le rôle capital joué par la diffusion de chaleur dans la propagation de fronts de changement de phase. Les simulat…
Article Continuous filtration and titration apparatus for real time monitoring of polyelectrolyte concentration and cationic demand of a paper furnish was published on January 1, 2003 in the journal Nordic Pulp & Paper Research Journal (volume 18, issue 1).
A new compound [La(NMP) 4 (H 2 O) 4 ][HGeMo 12 O 40 ]·2NMP·3H 2 O (NMP = N -methyl-2-pyrrolidone), 1 , was synthesized and characterized. The compound crystallizes in the monoclinic space group P 2 1 / c with a = 17.3428(4), b = 18.3258(5), c = 23.0387(7) Å, g = 107.088(1)°, V = 6998.9(3) Å 3 and Z = 4. The structure…
In this work we investigated the possibility of using scintillating rare earth Ce3☎, Tb3☎, and Pr3☎ ions to optically activate germanate glass matrices. Glasses were characterised in terms of radiation resistance, UV-VIS transmittance and luminescence spectra. Their radiation induced response was found to be dependent…
This paper is an overview of fundamental studies and large scale achievements of the foam decontamination technique in the frame of a ten years research program conducted in the CEA. Main aspects of foam feature (hydrodynamic, stability, chemical composition) are developped. Industrial applications gave the opportunit…
The three phase transitions at T 1, T 2 and T 3 in CsZnPO 4 crystal have been studied using an X-ray diffraction technique with both bulk and powder crystals. It is found in bulk crystals that all the three phase transitions take place and that two high temperature phase transitions at T 1 and T 2 are fast, while the…
Contrary to the conclusions based on isotropic elasticity, anisotropic elasticity theory predicts that a screw dislocation in the b.c.c. lattice dissociated symmetrically into three 1/6 [111] partial dislocations on {110} planes is stable or metastable. A symmetric dissociation on {112} planes is unstable. For the hig…
The decomposition performance of p-chlorophenol in aqueous solution by combination of ultrasound and ultraviolet light was examined. The decomposition of p-chlorophenol in aqueous solution was a pseudo-first-order reaction. The decomposition rate constant increased with increasing ultrasonic intensity and became lower…
The composition of nitrogen-doped hydrogenated amorphous carbon (a-C : H : N) films grown in a magnetically confined rf plasma-enhanced chemical vapour deposition system has been determined by X-ray photoelectron spectroscopy (XPS) and compared with that determined using a combination of elastic recoil detection analy…
Electrochemical capacitors have been devised using hybrid electrolytes containing either lithium or magnesium salt and high-density graphite (HDG) electrodes. The cells exhibit single-electrode discharge capacitance of 355 μF/cm 2 at 1 mA/cm 2 discharge rate for magnesium-containing ormolytes at 80°C. Typical response…
Issues associated with the development of an alkali metal thermal‐to‐electric conversion (AMTEC) converter model that serves as an effective design tool were investigated. The requirements and performance prediction equations for the model were evaluated, and a modeling methodology was established. It was determined b…
Method of modification of highly oriented pyrolytic graphite (HOPG) is proposed for deposition of biological objects especially DNA for scanning probe microscopy. Atomic force microscopy (AFM) images of DNA on HOPG are compared with those on conventional support — mica. The advantages of HOPG as a substrate for DNA fo…
A kinetic model for NOx production has been developed to predict NOx emissions. The reaction scheme is a modified super-extended Zel’dovich mechanism (SEZM), which includes 43 reactions and 20 species instead of just the three reactions typically used in the extended Zel’dovich mechanism. The NOx emissions predicted b…
The following topics were dealt with: GIS; photonics; insulation diagnosis of GIS and cables; electronics; environmental issues; new measurements and evaluation methods; partial discharge; space charge measurements; treeing; space charge application; aging and lifetime estimation; conduction and breakdown in solids; a…
Плавление графита и жидкий углерод (О статье в УФН Э.И. Асиновского, А.В. Кириллина и А.В. Костановского "Эксперименетальное исследование термических свойста углерода при высоких температурах и умеренных давлениях"), Савватимский А.И.
The microstructure of chafer cuticle was observed by scanning electron microscope. It was found that chafer cuticle is a kind of chitin fiber-reinforced laminate-composite with sclerotized protein matrix. The fiber-reinforced plies parallel the surface of the cuticle. There is a series of peculiar microstructures incl…
Melt Growth Composite material (MGC) consists of multiple single crystal with fine entangled in three dimensional network structures. The MGCs are thermally stable and have higher creep resistance. Furthermore, the flexural strength at room temperature can be maintained almost up to the melting point. In this study, i…
This paper describes the principle of flow-levitation method. An analytical mode l for preparation of nanometal powders in inert gases is presented. Associated w ith the relation between dynamics of gas flow and temperature, the process of th ermal diffusion, nucleation, condensation and crystallization of powders is…