Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTProton nuclear magnetic resonance studies of high-spin manganese(III) complexes with synthetic porphyrinsGerd N. La Mar and F. Ann WalkerCite this: J. Am. Chem. Soc. 1975, 97, 18, 5103–5107Publication Date (Print):September 1, 1975Publication History Published online1 May 20…
Criteria governing the successful application of RE2T17compounds in permanent magnet production are suggested, based upon the experience gained with RECo5materials. The implications of these criteria to both alloy composition and production techniques are illustrated for Sm2(CO1-xFex)17. In this respect the primary ma…
A completely sealed-off electron beam-addressed light valve offering high reliability, low thermal impedance, and low-voltage operation is described. It is suitable for projection displays and is capable of producing bright high-contrast images with full gray-scale range and long-term storage. The light valve is conta…
The vertical section of the Fe-Cr-Co system at 15 wt%Co, 1 wt%Nb and 1 wt%Al was constructed. The extention of the α phase region of the system was sufficient enough to allow for the solution treatment of the alloys at 25∼30 wt%Cr content at any temperature above the α1+α2miscibility gap. After step-tempering, their m…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTReversible intramolecular electron transfer in an oxidized nickel porphyrinD. Dolphin, T. Niem, R. H. Felton, and I. FujitaCite this: J. Am. Chem. Soc. 1975, 97, 18, 5288–5290Publication Date (Print):September 1, 1975Publication History Published online1 May 2002Published in…
Lattice parameters of Te${\mathrm{O}}_{2}$ have been measured from 0 to 32.5 kbar by time-of-flight neutron diffraction. Atomic-position parameters have also been measured to 20 kbar for both the low-pressure tetragonal paratellurite phase and the high-pressure orthorhombic phase, which we determined to have a structu…
Magnetic susceptibility, X-ray diffraction and neutron diffraction measurements have been made on quenched and slow-cooled samples of Ni 2 MnAl alloy. Above 300K the susceptibility is Curie-Weiss but on cooling below this temperature the susceptibility becomes field dependent. Neutron diffraction patterns indicate tha…
Electrode surface roughness can cause a large reduction of the threshold for break down in SF6insulated apparatus. This effect is discussed by applying the streamer theory of breakdown to the microscopic field regions associated with surface roughness. A quantitative relation is derived between the practical breakdown…
The oxidation behavior at 1370°C of dense SiC, hot‐pressed with the aid of Al 2 O 3 , has been investigated as a function of Al 2 O 3 content. Increasing amounts of the Al 2 O 3 hot‐pressing aid increased the oxidation rate. Observations of the oxide surface show that a glassy phase (indicating formation of a liquid a…
Abstract Reinforcement can improve the modulus, heat distortion temperature and thermal expansion coefficient of rubber modified polypropylene. These improvements canbe obtained with a minimum sacrifice in resin ductility and impact toughness. Our studies have shown that reinforcement with small discontinuous fibers c…
Summary Phosphate sorption data for twenty‐nine soils were found to fit the Freundlich adsorption isotherm better if a measure of native labile P was first added to the sorption data, and this sum plotted against intensity. The exponent from the isotherm thus obtained was closely related to exchangeable A1 (in acid so…
The dynamic mechanical properties of thermoplastic urethane elastomers have been charac-terized for polymers composed of varying hard-segment concentrations and for two different molecular weight polyester diols as soft segments. The urethane polymers based on an 830 M̄n polycaprolactone diol exhibited a progressive i…
We give a chart mostly useful for heating and cooling Mn-Zn-ferrites with a constant oxidation degree. This chart has five different scales : a logarithmic one for PO2(arm), temperature (I/T), scales for Fe2O3and MnO contents (mole %) and another one for the oxidation degree. In the composition range given, with fixed…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPreparation and Properties of Polydimethylsiloxane and Its Block Copolymers with StyreneJ. G. Zilliox, J. E. L. Roovers, and S. BywaterCite this: Macromolecules 1975, 8, 5, 573–578Publication Date (Print):September 1, 1975Publication History Published online1 May 2002Publish…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTReversible adsorption of oxygen on silica gel modified by imidazole-attached iron tetraphenylporphyrinOrlando Leal, David L. Anderson, Robert G. Bowman, Fred Basolo, and Robert L. Burwell Jr.Cite this: J. Am. Chem. Soc. 1975, 97, 18, 5125–5129Publication Date (Print):Septemb…
The adhesion of radio-labeled chick embryo muscle cells to the surfaces of radiation grafted hydrogels and other polymeric materials was measured in vitro. The degree of adhesion was determined by measuring the percentage of cells which remained adherent to the surfaces after 180 min of contact time (plating efficienc…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTModel Compounds and 13C NMR Observation of Stereosequences of PolypropyleneA. Zambelli, P. Locatelli, G. Bajo, and F. A. BoveyCite this: Macromolecules 1975, 8, 5, 687–689Publication Date (Print):September 1, 1975Publication History Published online1 May 2002Published inissu…
Intergranular stress corrosion cracking (SCC) of Inconel 600 is of concern to the nuclear power industry. Heat exchangers in commercial nuclear systems have shown SCC in only a fraction of a percent of the tubes in high temperature water, but laboratory SCC of Ni-containing alloys have been demonstrated by several res…
A series of thermoplastic urethane elastomers with soft segments of varying sequence length was prepared and their dynamic mechanical properties were characterized over a wide temperature range. The polymers were prepared using various molecular weight polycaprolactone diols as the soft segment and 4,4′-diphenylmethan…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInfrared spectrum and structure of matrix-isolated sulfur tetroxideRoger Kugel and Henry TaubeCite this: J. Phys. Chem. 1975, 79, 20, 2130–2135Publication Date (Print):September 1, 1975Publication History Published online1 May 2002Published inissue 1 September 1975https://pu…