Materials Literature
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The electronic absorption spectra of tetrahalide complexes of ZnII, CdII, HgII, and TlIII have been measured either in solution or as thin films. The effects of second-order spin–orbit coupling account satisfactorily for the observed band intensities and splittings. The one-electron transitions responsible for the low…
The self-association of four simple aliphatic alcohols in ether solution has been investigated. In the concentration range 0·1–1·2 mol dm–3 the principal polymer is in every case the dimer. At 25 °C the dimerisation constants K2(=[dimer]/[monomer]2) have the values 0·49, 0·71, 0·50, and 0·72 for MeOH, EtOH, PriOH, and…
Modeling and Analysis of Mechanical Systems. Modeling of Electrical Systems. Elasticity, Damping, and Mechanical Transformers. Fluid and Thermal Systems. Frequency Response and Vibration. Introduction to Feedback Control Systems. Control System Design: Tuning, Compensation, and Digital Control. The Root Locus Method.…
Article Experimentelle Bestimmung der Gitterparameter der Platinmetalle im Temperaturbereich von -190 bis 1709°C was published on January 1, 1972 in the journal International Journal of Materials Research (volume 63, issue 1).
There are eras in research when days are filled with excitement because unique materials are being produced and researchers "think what nobody else has thought" (Albert von Szent Gyorgyi). Such were the periods when many new optical glasses emerged from the laboratories of the Eastman Kodak Company and when the hot pr…
Sulphur dioxide interacts reversibly with tetraphenylporphyrincobalt(II) to form an adduct in which SO2 functions as a donor, while oxygen forms a superoxide complex.
During heat‐treatment of anodic in vacuum (10 −5 Torr) at temperatures in the range from 200° to 700°C oxygen exchange between the anodic oxide, the Ta substrate, and the atmosphere was observed. Galvanostatic reanodization experiments resulted in potential‐time (charge) curves which could be used to determine the oxi…
The new compound, UOF4, has been prepared by the reaction of UF6 with H2O in a HF slurry.
Abstract New amino aromatic esters and ethers of cellulose were synthetized. Then grafting processes were performed on these derivatives by using acrylic, methacrylic and N‐vinyl pyrolidone monomers. Finally, chemical structure and physicomechanical properties were determined. Industrial experiments proved the utility…
The Symposium on Localized Corrosion—Cause of Metal Fatigue was presented at the Seventy-fourth Annual Meeting of the American Society for Testing and Materials held in Atlantic City, N. J, 27 June-2 July 1971. The sponsor of this symposium was Comm
Electrolytic effects, crystal coloration, and charge storage observed when an electric field is applied to single crystals of calcium orthovanadate at temperatures above 700 °C are shown to be associated with oxygen migration and the creation of V 4+ centers in the crystal. The oxygen transport number is shown to be c…
By an insulating film we mean one which passes little or no electric current on the application of a voltage across it. If the film were a single crystal of pure material this would require it to have a bandgap of 2 eV or more, so that there would be few intrinsic carriers over a practical temperature range. In practi…
Anodic pit generation and pit growth of stainless steel at constant potential in a sulphuric acid solution containing chloride ion have been investigated by use of a rotating electrode. The electrode rotation makes the generation and growth of pits very stable and enables the pit generation frequency and the pitting c…
The heat capacity and the enthalpy of the quantitative thermal decomposition of crystalline Au2O3 have been measured by differential scanning calorimetry. A value of –13.0±2.4 kJ mol–1 is calculated for ΔfH⊖(Au2O3,s).
Interactions of calcium ions with uncharged sugars lead to complexes in which the calcium ions are surrounded by square-antiprism co-ordination shells composed of water molecules and sugar hydroxyl groups.
Stress corrosion crack growth rates (dA/dT) as a function of stress intensity factor (K) were determined over a wide range of electrode potentials for AISI 4340 steel (200-ksi yield strength level) in deaerated 3.5 percent sodium chloride solution buffered to pH 3.8. Particular emphasis was placed on conducting the st…
The state of stresses and displacements in thin films due to the presence of a periodic distribution of screw dislocations and edge dislocations is investigated by the method of continuously distributed dislocations and the three-dimensional theory of elasticity. The dislocations are straight and pierce obliquely the…
Abstract Changes in the internal morphology of lint cotton fibers during purification and swelling treatments were investigated by measurement of nitrogen adsorption at liquid nitrogen temperature. Surface areas and pore size distributions were calculated from the adsorption isotherms and compared with findings from m…
Abstract The vapour pressure curve of liquid potassium was measured up to the critical point which was found at T crit = 1925 °C ± 30 and P crit = 155 ± 15 bar. Using these vapour pressure data and existing density data of the vapour and liquid at saturation pressure the vaporization entropy of potassium as a function…
Continuing preceding research on this field, angular distributions of η and δ electrons from thin films of Al and Au have been investigated by means of a considerably improved apparatus. Measurements have been made in forward and backward directions with primary energies in the interval 1 to 20 keV with normal as well…