Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTBehavior of Ruthenium in GlassJ. MukerjiCite this: Ind. Eng. Chem. Prod. Res. Dev. 1972, 11, 2, 178–183Publication Date (Print):June 1, 1972Publication History Published online1 May 2002Published inissue 1 June 1972https://pubs.acs.org/doi/10.1021/i360042a010https://doi.org/…
An X ray goniometer is described in which the principal characteristic is that the sample, placed in a horizontal plane, remains motionless, while the X ray tube and X ray counter move symmetrically. This apparatus is specially designed for use with a high temperature X ray diffraction furnace associated with other te…
Copper single crystals of extremely low dislocation density have been obtained through a thermal cyclic annealing. Ball indentation in the dislocation-free area of (111) surface produced large dislocation rosettes, each arm extending in the 〈110〉 cystallographic orientations consisted of a row of prismatic dislocation…
Derivative structures based upon sphalerite or galena often exhibit hexagonal superstructures characteristic of a peculiar thirteenfold multiplicity. A synthetic semiconductor, Cu 7 As 6 Se 13 , is one of the examples. Crystals of Cu 7 As 6 Se 13 are rhombohedral with a = 8.71 Å, α = 105°41′. The space group is R 3. T…
The defect structures in irradiated type 304 stainless steel were characterized by transmission electron microscopy for irradiation temperatures between 370 and 840°C and for fluences ranging from 1018 to 1023 neutrons/cm2 (> 0.1 MeV). Below about 550°C the interstitial atoms produced by the irradiation precipitate as…
Laboratory studies are discussed in which steels were exposed to synthetic flue-gas atmospheres at temperatures ranging from 316 to 538 C (600 to 1000 F) in the presence of various salt mixtures. It was shown that the addition of chloride salts to mixed sulfates greatly accelerated the corrosion, particularly at 538 C…
The reflectance of evaporated rhenium (Re) and tungsten (W) was measured in the wavelength region from 300 to 2000 Å. Re and W of 99.99% purity were evaporated with a 6-kW fine-focused electron gun and deposited on glass and fused-quartz plates of various temperatures ranging from 40 to 500°C. With Re, films of highes…
Studies have been made of the tempering at 400° and 600°C of h.c.p. and orthorhombic martensitic phases in alloys with up to 32 w/o tantalum, and of the retained β phase in higher tantalum alloys. Precipitation of the equilibrium β phase as disc-shaped particles with the Burgers orientation relation and with a habit p…
Abstract In non-aqueous systems, kaolinite can show, in addition to the physical interactions, considerable chemical activity. This study considers the chemical reactions that can occur at the kaolinite surface and explains these reactions in terms of acid-base interactions. In certain applications the chemical activi…
ESR spectra of the ScS and YS molecules in their ground 2Σ+ states were measured while trapped in solid argon or neon matrices at 4°K. g tensors and hyperfine structure constants for interaction with the metal nuclei were accurately derived, within the ambiguity of multiple matrix sites. Earlier ESR data on ScO were a…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTReaction of catechol with colloidal silica and silicic acid in aqueous ammoniaDennis W. BarnumCite this: Inorg. Chem. 1972, 11, 6, 1424–1429Publication Date (Print):June 1, 1972Publication History Published online1 May 2002Published inissue 1 June 1972https://pubs.acs.org/do…
A common objective in designing a postmortem type of plate-impact experiment is to be able to attribute the observable residual effects (such as residual strain, hardness, or dislocation density) primarily to the conditions which existed while the material was in a state of uniaxial strain. In the past it has generall…
In both pIants and animals the mechanism of ribosomal RNA synthesis is thought to be the same, yet genetic and biochemical evidence points to a dispersed origin along chromosomal DNA in plants
Structural, magnetic, and magneto-optic properties of Mn1−xTixBi films (0≤x≤0.2) prepared by a vacuum-evaporation technique are reported. The crystallographic structure and the order of phase transformations of unsubstituted MnBi films were not altered by Ti. Both low-temperature (LT) phase and quenched high-temperatu…
The effect of impurities on the critical interaction strength for the Mott transition has been investigated using an extension of the Gutzwiller approach to correlation in the metallic state. It is shown that the band narrowing due to impurities causes a reduction of the effective interaction necessary for the transit…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructure of tetra-n-propylporphine. Average structure for the free base macrocycle from three independent determinationsPenelope W. Codding and A. TulinskyCite this: J. Am. Chem. Soc. 1972, 94, 12, 4151–4157Publication Date (Print):June 1, 1972Publication History Published…
The normal spinel Fe[Cr 2 ]S 4 has been studied using the Mössbauer effect. Spectra have been collected over the temperature range 2–500 °K. Results are presented for the quantity [Formula: see text], the hyperfine field, and the isomer shift. We find that the magnetically split spectra can be fitted using a zero valu…
Abstract The synthesis and general physical characteristics of the perfluoroalkylene‐linked aromatic polyimides have been discussed in Part I. In this paper the hydrolytic, oxidative, and thermal stabilities of these polymers are compared with those of certain wholly aromatic polyimides. Comparative studies are also m…
Abstract Phosphatization of limestones on the Agulhas Bank, southern tip of Africa
Abstract As to the modes of inhibiting electrode processes, it belongs to the present tasks of the Working Party “Inhibitors” of the European Federation Corrosion first to elaborate valid formulations in definition, nomenclature and classification and second to present a review on methodology for investigating inhibit…