Materials Literature
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This paper summarizes the results of numerous investigations on the structure, surface properties and flotation behaviour of chrysocolla. Until the late sixties, chrysocolla was considered to be a hydrated copper silicate without fixed mineral composition. Recent articles, however, have revealed that chrysocolla is a…
Deformation twins have been observed in the intermetallic compound Cu2Sb. The theory of Bevis and Crocker (1968) has been applied to calculate, using a computer program, possible twinning modes in the tetragonal lattice of Cu2Sb. Twins in five separate crystals have been studied by two-surface methods in order to esti…
The platinum on silica catalyst designated EUROPT-1 has recently become available as a standard reference catalyst for the scientific communities in academy and industry. The material, which was manufactured by Johnson Matthey, has been characterised by the Council of Europe’s Research Group on Catalysis, and the full…
Article The crystal structure of jaskolskiite, Cux Pb2+X (Sb, Bi)2-x S5(x ≈ 0.2), a member of the meneghinite homologous series was published on October 1, 1985 in the journal Zeitschrift für Kristallographie - Crystalline Materials (volume 171, issue 1-4).
The reactivity effects of the initial fuel and clad motion during unprotected loss-of-flow accidents (ULOFs) strongly influence the accident progression in liquid-metal fast breeder reactors. To study these phenomena, a series of in-pile experiments (the STAR experiments) is being performed in which clad motion and fu…
Abstract Unter den Bedingungen der Phasen‐Transfer‐Katalyse reagieren die Pyrrol‐Derivate (I) mit dem Lösungsmittel Methylenchlorid zu den Methylen‐bis‐pyrrolen (II).
Rate coefficients for the oxidation reactions of zirconium ions with oxygen, nitric oxide, and carbon dioxide have been determined in the near-thermal energy range (0.04 to about 0.4 eV) using a selected-ion drift apparatus. The reactions are found to proceed with large rate coefficients [∼5(−10)cm3/s at 300 K]. At el…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSolubilities of various nitroanilines in water-pyridine, water-acetonitrile, and water-ethyleneglycol solventsJean Louis BrissetCite this: J. Chem. Eng. Data 1985, 30, 4, 381–383Publication Date (Print):October 1, 1985Publication History Published online1 May 2002Published i…
Diamond particles were dispersed in silicon nitride, sintered at 6 GPa and 1600°C for 30 min, and heat‐treated under vacuum at 1300°C to induce graphitization of the diamond. Improved fracture toughness values up to 7.5 MN/m 312 were achieved for these composites. Stress‐induced microcrack toughening is considered to…
Abstract Chemical preparation and crystal structure of Pb 2 Cs 3 (P 4 O 12 )(PO 3 ) 3 are described. The triclinic unit cell has the following dimensions: equation image space group is P 1 with Z = 2. The crystal structure has been solved by using 3350 unique reflexions with a final R value 0.048, The main outstanding…
Abstract The Raman spectra of pure silica core fibres revealed the presence of molecular oxygen, which may be responsible for two absorption bands, one at 0.76 and the other at 1.27 μm.
Electrolytic, chilled mirror, and aluminum oxide dielectric hygrometers were evaluated by exposing them to known moisture levels in gaseous argon. The experiments were performed over a period of several months to determine the long-term hysteresis effects which may occur under continuous operation in the range of 1 to…
Differential magnetic susceptibility data for ${\mathrm{CoCl}}_{2}$-GIC's (graphite intercalation compounds) are analyzed using the high-temperature series expansion of the classical spin model in two dimensions. On this basis, conclusive evidence for a classical two-dimensional (2D) XY model description of the magnet…
Abstract The energy loss of protons in the energy region from 40 to 350 keV is measured for (110), (100), and (111) planar channeling, for 〈110〉, 〈111〉, 〈112〉 axial channeling, and for random directions in silicon. The investigations are carried out by means of the transmission experiment using silicon targets of seve…
Shapes of cracks associated with Vickers indenter flaws in a glass‐ceramic were assessed by stepwise polishing and measuring surface traces as a function of depth. The cracks were of the Palmqvist type even at200‐N indentation load. The toad dependence of crack lengths and fracture toughness estimates were examined in…
Failure of the insulation in distribution- class metalclad switchgear may release large amounts of energy resulting in an explosive hazard to adjacent equipment and personnel. Many such failures have occurred in older outdoor and generating station switchgear within Ontario Hydro. The failures have often been caused b…
The various mechanisms of relaxation of rare earths in glasses are outlined. Examples are given for radiative transfer as a means of increasing pumping efficiencies. Nonradiative relaxation of rare earths in oxide and fluoride glasses follow an exponential law when two glass former phonons are subtracted. Cross-relaxa…
Abstract A study of signal‐to‐noise ( S / N ) was made in a Kratos ES300 XPS system on a variety of materials using both monochromatic and conventional X‐ray sources covering a wide range of count rates. Equations relating S / N to total counts ( S + B ), background ( B ), and the signal‐to‐background ( S / B ) ratio…
Changes in the distribution of anodic sites on steel and aluminum surfaces have been monitored by applying a pH-indicating dye and observing how the color pattern on the surface changes as cathodic protection is applied. In addition, cathodic polarization curves for steel in seawater have been correlated with 120-day…
Inhibition of fluid flow instabilities in the melt by the axial magnetic field in Czochralski silicon crystal growth (AMCZ) is investigated precisely by a high-sensitivity striation etch in conjunction with temperature measurements. The magnetic field strength (B) was varied up to 4.0 kG, incremented mostly in 0.5-kG/…