Materials Literature
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As for the steels for wheel rim, CC killed steel will be more prevalent instead of rimmed steel in accordance with the increase of CC ratio in steel production. In addition, from the point of weight reduction of cars, high strength steels are tried to put into practice. As far as wheel rim is concerned, flash weldabil…
The dynamic-compression properties of carpet are expected to play an important role in their mechanical performance. An investigation is described in which the dynamic properties were measured by using a reaction mass-vibration system at frequencies in the range 20–85 Hz. The dynamic-compression modulus and damping we…
Cathodic delamination of neoprene-to-steel adhesive bonds prepared using a proprietary vulcanizing adhesive and primer was investigated using Fourier-transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS). Chlorinated rubber in the adhesive and primer was stable during immersion in NaOH solu…
A series of dealuminated mordenites has been studied by infrared structural spectroscopy. Linear correlations were found between the wavenumber and the relative absorbance of one specific skeletal vibration and the structural aluminium content as determined by 27Al m.a.s.n.m.r. spectroscopy. Based on these results thi…
Failure analysis was conducted on three modular cast-iron globe valves of different sizes used in flowing seawater cooling systems. The 3-in. valve suffered from cavitation corrosion and erosion cracks. In the larger valves, intensified localised attack was found under voluminous scales. In all valves, galvanic corros…
Abstract This article focuses on the machining of reactive metals which refer collectively to the elements titanium, hafnium, and zirconium. It provides guidelines for machining titanium and titanium alloys and describes machining operations, such as turning, milling, drilling, tapping, reaming, grinding, and sawing,…
In South Africa and in the rest of the world, the two mica minerals that have the most important commercial value are muscovite and vermiculite. Muscovite has been making a comparatively small but steady contribution to South Africa's mineral exports since about 1960. Vermiculite mining and concentration were started…
-spacing bit map search. With typical data, a full search through ~ 71,000 compounds takes 10~20 seconds on a PDP 11/23-RL02 system.
Abstract The past decade has seen greatly increased interest in ceramic materials with special combinations of properties. Their hardness, high resistance to abrasive and erosive wear, and their good corrosion resistance when used under extreme mechanical and thermal conditions have made ceramics increasingly attracti…
The authors discuss corona and breakdown in compressed sulfur hexafluoride (SF/sub 6/) gas-insulated transmission line (GITL) equipment due to free conducting particles. For particle-contaminated conditions, dynamic models of particle movement and particle-initiated corona and breakdown have been developed. Moreover,…
Ultrasonic and viscoelastic relaxation spectra were determined for a mixture of acetamide and calcium nitrate [X (acetamide)= 0.7644]. Retardation phenomena are present in the viscoelastic relaxation spectrum and they seem to be affected by the type of container used; the ultrasonic spectrum is due to a chemical equil…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTUltrasonic, volumetric, and viscometric studies of tetracycline and its allied compoundJ. D. Pandey, A. Shukla, K. Misra, and R. D. RaiCite this: J. Chem. Eng. Data 1989, 34, 1, 29–31Publication Date (Print):January 1, 1989Publication History Published online1 May 2002Publis…
Accelerated electrochemical tests with cyclic immersions and emersions and electrode potential measurements during the periods of immersion help to assess the corrosion behavior of metallic material under different climatic conditions and to understand the atmospheric corrosion or passivation mechanism. Results of bot…
A universal analytic formula is given for the total cross sections of single-electron capture by multiply-charged ions colliding with H, H 2 or He. Values of constants in the formula have been determined by least-squares fit to experimental data collected from the literature. The formula is applicable to ions of almos…
Deuterium NMR studies have been performed in LiCl\ensuremath{\cdot}R(${\mathrm{D}}_{2}$O) (mole fraction R=4 and 7, respectively) over the temperature range of 15 to 170 K, i.e., below and above the glass transition temperature (${T}_{g}$\ensuremath{\simeq}145 K). The motional mechanism of the four ${\mathrm{D}}_{2}$O…
Two-electron and four-electron reduction of dioxygen by an acid-stable NADH model compound, 10-methylacridan, occurs efficiently when catalysed by metalloporphyrins and by both metalloporphyrins and iodide ion in the presence of perchloric acid in acetonitrile, respectively.
The cubic system of the space group denoted by Oh5–Fm3m with the lattice constant of a=0.5833±0.0003 nm has been found more feasible for the crystal structure of superionic phase of Cu2Se (α-Cu2Se) at 473 K using the usual powder X-ray diffraction method. The present conclusion has also been supported by the anomalous…
Microstructural and property assessments have been undertaken on spray deposited M2 high speed steel in the as deposited condition and after hot forging. The response of the material to hardening treatment has also been studied. The microstructure of the as deposited material showed a small grain size with a cellular…
At current densities large in magnitude and also large compared to the exchange current density, a conducting disk in an insulating plane has a very nonuniform current distribution across the surface. The current distribution near the center is governed predominantly by ohmic effects, but near the edge, electrode kine…
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