Materials Literature
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By twisting copper single crystals to introduce known densities of forest dislocations, the tension yield stress has been related to the forest density in the form: where τ00 ≃ 5g/mm2 and α0 ≃ 0·65. The “small value of τ00 suggests that the yield stress is determined mainly by the forest dislocation density.
Abstract Castor oil has been used to prepare millable elastomers by using 2,4‐toluene diisocyanate, 4,4′‐diphenylmethane diisocyanate, and 1,5‐naphthalene diisocyanate, respectively. These elastomers are vulcanized with sulfur and 4,4′‐diphenylmethane diisocyanate separately by using the standard methods of rubber tec…
The merits of a multi-layer sandwich technique for explosive shock loading of metal foils are discussed with special reference to electron transmission studies of microstructure. The conditions are given for the design of the explosive test assembly such that the foil specimens are subjected to a plane compression wav…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTUltrahigh pressure-high temperature synthesis of rhombohedral dichalcogenides of molybdenum and tungstenMeyer S. SilvermanCite this: Inorg. Chem. 1967, 6, 5, 1063–1064Publication Date (Print):May 1, 1967Publication History Published online1 May 2002Published inissue 1 May 19…
Abstract Effects of a naphthenic oil and of HAF carbon black on SBR processability were evaluated. Three rheological parameters related to processability are apparent viscosity, extrudate swell and extrudate surface roughness; they were studied with a capillary rheometer over a shear rate range of 10 to 3000 sec −1 .…
Abstract Microheterogeneity has been observed in several elastomer blends on thin frozen sections, microtomed in a nitrogen atmosphere to eliminate all surface oxidation and cracking, in both phase and electron microscopes. Phase photomicrographs and electron micrographs showing identical detail were obtained on secti…
Magnetization measurements along the a -and c -axes of a single crystal of a compound Fe 7 Se 8 have been carried out in magnetic fields up to 92 kOe over the temperature range 4.2° to 300°K, together with magnetic torque measurements on the b c -plane up to 9 kOe. The results of magnetization measurements along the c…
The amplitude of the first-order diffracted wave is computed as a function of the thickness and the variation of dielectric constant of a dielectric grating, if the light is incident at the Bragg angle. It is shown that it is possible to diffract 100% of the incident radiation if the thickness and variation of dielect…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStudies on the reaction between peroxydisulfate ions and aromatic amines. Boyland-Sims oxidationEdward J. BehrmanCite this: J. Am. Chem. Soc. 1967, 89, 10, 2424–2428Publication Date (Print):May 1, 1967Publication History Published online1 May 2002Published inissue 1 May 1967…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTReaction of carbon monoxide at atmospheric pressure with trialkylboranes. Synthesis of trialkylcarbinols via hydroborationHerbert Charles. Brown and Michael W. RathkeCite this: J. Am. Chem. Soc. 1967, 89, 11, 2737–2738Publication Date (Print):May 1, 1967Publication History P…
Computer calculations of the fraction of gel as a function of radiation dose have enabled tables to be constructed of the relation between gel fraction and number of crosslinks for various initial weight to number average molecular weight ratios and for a number of different ratios of chain scissions to crosslinks. Th…
Single crystals of niobium were purified by heating in high vacuum and then tested in tension or compression at various temperatures. Three-stage hardening curves were found at room temperature for single slip orientations, irrespective of whether the primary slip plane was of {101} or {211} type. An initial rapid har…
Thin foils of four face centered cubic iron-nickel-chromium alloys and of pure iron and pure nickel have been examined in the electron microscope before and after exposure to boiling MgCl2. Evidence of parallel dissolution arrays in stressed thin foils was taken as confirmation of formation of slip steps by dislocatio…
Abstract Benzene and aniline clathrates of metal-complex host lattices with a general formula of M(II)(NH3)2Ni(CN)4·2G, in which M(II) was nickel, copper, or cadmium, and G, benzene or aniline as the guest molecule, were prepared. The stoichiometry was established through the analytical data and the structural informa…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA Model and Experimental Results for Drainage of Solution between Foam BubblesP. A. Haas and H. F. JohnsonCite this: Ind. Eng. Chem. Fundamen. 1967, 6, 2, 225–233Publication Date (Print):May 1, 1967Publication History Published online1 May 2002Published inissue 1 May 1967htt…
The influence of a distribution of relaxation times is studied in annealing experiments. A two-relaxation time model is proposed, which permits the calculation of the distribution of relaxation times from the crossover data of Spinner and Napolitano as well as that of Ritland. This model also characterizes the structu…
The system Zr‐O was studied in the composition range 50 to 66.7 at.% O by metallographic analysis, high‐temperature X‐ray analysis, and lattice parameter determinations at room temperature. The solubility of zirconium in zirconia was determined from 1200° to 2000°C, and the cubic‐tetragonal inversion temperature of Zr…
The dynamic Young's moduli E of molded films of a polyethylene and a polypropylene were found to decrease with increasing thickness t. An upper limit of E appears to exist when the film thickness is reduced to less than 1 mil. For thicker films, E is inversely proportional to t. Finally, the modulus approaches a lower…
Thin foils were prepared from slices taken in selected orientations from crystals deformed in compression by single glide on (101) or (211) or by double glide on (211) and (211). At room temperature the structures observed after single glide were quite similar to those which have been reported for copper. In stage I,…
Abstract Growth rates of ammonium‐ and potassium‐dihydrogen phosphate crystal faces have been measured in a simple laboratory apparatus under carefully controlled conditions of temperature, supersaturation and solution velocity. The growth process, which was found to be second‐order with respect to the supersaturation…