Materials Literature
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Grain-boundary impurity diffusion of Au along the incoherent twin boundary in a diffusion-bonded Cu bicrystal has been studied by the serial sectioning technique. The measured penetration profiles had a rather atypical shape which we interpreted in terms of structural multiplicity of the grain-boundary structure. A me…
Correlation between the shape of Raman, photoluminescence (PL) and Electron Spin Resonance (ESR) signals in CVD diamond films was examined for both undoped and nitrogen-doped films. No correlation was observed between the shift of the diamond Raman line and its linewidth, even for the films produced under essentially…
The phase assemblage formation resulting from hydration of a tetracalcium aluminoferrite (ferrite) powder (4CaO·Al 2 O 3 ·Fe 2 O 3 ) was investigated by isothermal calorimetry, X ray diffraction analyses and scanning electron microscopy (SEM). Hydration of the ferrite powder was carried out isothermally at 50°C in 1·0…
Mixed radioactive and chemical wastes stored in tanks across the DOE complex generate hydrogen, ammonia, nitrous oxide, and nitrogen by a complex series of radiolytic and thermolytic reactions. Flammable conditions may result when these gases accumulate in the dome space of the waste tanks. A phenomenological model wa…
The transformation of X‐phase SiAlON (a composition of approximately Si 3 Al 6 O 12 N 2 ) to 3/2 mullite (3Al 2 O 3 ·2SiO 2 ) plus vitreous silica (SiO 2 ) at temperatures >1200°C has been studied in polycrystalline ceramics via transmission electron microscopy. The transformation of X‐phase SiAlON to mullite is ob…
Used Galvinoxyl as catalyst, the phase transfer catalyzed method of oxidation of primary amines to symmetrical azobenzenes with a saturated solution of potassium ferricyanide in 2N aqueous potassium hydroxide and dichloromethane is described for the first time in this paper. The reaction has intimate relation with Ham…
HFC-365mfc and HFC-245fa are now well documented as promising blowing agents, and their production will come on stream in a few years. However, none has the same ideal boiling point as CFC-11 or HCFC-141b. Blends may offer the best compromise to customize the different end-use requirements. Two different directions fo…
Density and viscosity of poly(ethylene glycol) nonylphenyl ether (PEG-NPE) saturated with supercritical carbon dioxide (SC CO2), as well as the interfacial tension in the PEG-NPE-SC CO2 system, were evaluated for the temperature range of 323 K to 343 K and pressures of 10.0 to 25.5 MPa. Remarkable polymer swelling as…
The interface between thin films of polystyrene (PS) and polyparamethylstyrene (PpMS) was investigated in the presence of the diblock copolymer P(S-b-pMS). The use of neutron reflectivity and 15N nuclear reaction analysis in combination with suitable deuteration of the components provides information on the interface…
A high-speed photographic film record of a Taylor impact experiment was analysed to determine the strain, strain rate and stress. The stress was calculated on the basis of an interpretive analysis by Taylor involving the motion of a plastic wave in the material. The data on drawn OFE copper produced stresses from 300…
As a chemical indicator, the isomerization rate of so-called 6-SO3−-spiropyran was used to estimate the equilibrium constants for the inclusion complex formation of β- and γ-cyclodextrins (β and γ-CDs). The association constants for inclusion complexes of β- and γ-CDs with various kinds of phenols were determined. It…
We report the formation of an amorphous phase in nanosized Bi particles embedded in an Al-based glassy alloy matrix. High-resolution electron microscopy (HREM) has been used to show that the particles contain crystalline and amorphous portions. A depression of the melting point by more than 100K of the crystalline por…
: Washcoat loading on automotive exhaust catalysts is normally determined, in production, by a weight gain procedure, which gives an accurate measure of washcoat weight present on an individual catalyst but does not address such parameters as uniformity of washcoat loading and geometric surface area within the monolit…
The ARTEMIS BRITE-EURAM program has been presented in this paper. Its main objective is to develop a diagnostic methodology to assess i) the susceptibility of polymeric cable insulation to electrical ageing; and ii) the state of the insulation at any chosen time in order to evaluate the remaining life-time of operatin…
The melting (solidus) temperatures were measured for fuel simulating burnups of 50, 90, 130, 170, 210 and 250 GWd/t (SIMFUEL) which were added non-radioactive soluble fission products (FPs) to unirradiated fast reactor MOX fuel. The melting temperatures for fuels of 250 GWd/t which were blended non-radioactive soluble…
Abstract The size-distribution of ZnS nanoparticles (Q-ZnS) of 4.2 ± 0.6 nm was narrowed to 2.6 ± 0.2 nm by sequential irradiation with monochromatic light of 313 nm, 303 nm, and 297 nm to an air-saturated ZnS colloidal solution in the presence of sodium hexametaphosphate as a stabilizer and methylviologen as an elect…
Internal stresses in tension and compression in an extruded and artificially aged Mg-7.7at.% Al alloy have been determined by in-situ neutron diffraction. Measurements were made on grains having the c axis normal to, parallel to and at 62° from the stress axis, and on the reinforcing phase. The results are consistent…
Convection is an important determinant for both sensible and evaporative heat exchange. Heat transfer by convection for normal boundary conditions is readily described by simple power functions. Clothing affects convection in various ways and existing characterisation of clothing by its static insulation values produc…
An efficient synthesis of alcohol 2 is described from L-Serine (OMe) in four synthetic steps. The process uses readily available reagents and is suitable for manufacturing.
Migration diffusion coefficients of two surfactants (sorbitan laurate, SPAN-20 and sorbitan palmitate, SPAN-40) in polyethylene blend are calculated in the desorption process by means of Fourier transform infrared (FT-IR) spectroscopy technique at 25°C. They are 2.31 and 2.24 × 10−11 cm2/s, respectively, which show no…