Materials Literature
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Magnetically uniaxial amorphous Co79Fe6.5B14.5 films 1.5 μm in thickness were deposited by r.f. bias sputtering from a Co74Fe6B20 target onto glass and single crystal Si substrates. The saturation magnetostriction, λs, changed gradually from +0.6×10−6 to −0.4×10−6 when the d.c. bias voltage was increased from 0 to −12…
Any cubic crystal structure can be divided into small units in the form of congruent semi-regular (Archimedean) truncated octahedra. The centers of these polyhedra can be chosen at invariant equivalent positions for most cubic space groups. The part of a crystal structure enclosed by an Archimedean polyhedron is calle…
Ferrite devices for millimeter frequencies, 35 GHz to 94 GHz, are difficult to fabricate and have marginal performance. This paper discusses the design and arc plasma fabrication process for non-reciprocal ferrite phase shifters for millimeter frequencies. Design and fabrication techniques were developed for 35 GHz, p…
Abstract The compatibility and mechanical properties of poly(vinyl chloride) (PVC) and thermoplastic polyurethane (PU) are described in this paper. The compatibility has been estimated using a variety of methods including the measurements of viscosity of polymer solutions, comparison of solubility parameters of PVC an…
This paper reports on the application of the concept of effective permeability using the finite element technique, to the solution of eddy current problems, and the determination of damping resistances as well as the characteristics of the solid iron rotors in rotating machinery during transients. The formulation is b…
Mn1-x-yAlxCyforms for0.42 \leq x \leq 0.47and0 \leq Y \leq 0.021a metastable tetragonal τ-phase which is ferromagnetic. Its unaxial magnetic anisotropy makes it an interesting candidate for permanent magnetic applications. The metastable τ-phase is produced from the high temperature equilibrium ε-phase in two steps; a…
The determination of the glass-transition pressure by the ruby R1 line-broadening method is quantitatively confirmed to within 10% by an independent method. The procedure utilizes a model which describes the pressure dependence of the viscosity and contains the glass-transition pressure as a parameter. The two methods…
The Air Force Primary Adhesively Bonded Structure Technology (PABST) Program was started in February 1975 for the purpose of validating the concept of adhesive bonding primary fuselage structural members together in lieu of the use of rivets. The goal of the Program was to provide a cost saving of 20 percent of the ac…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEffect of Chain Length Distribution on Elastomeric Properties. 2. Comparisons among Networks of Varying Degrees of RandomnessJ. R. Falender, G. S. Y. Yeh, and J. E. MarkCite this: Macromolecules 1979, 12, 6, 1207–1209Publication Date (Print):November 1, 1979Publication Histo…
Abstract Plasma polymers from some silyl amines were produced by the radio frequency of 13.56 MHz, and the surface properties were investigated. The polymers were revealed to be as hydrophobic as a plasma polymer from tetramethylsilane, which does not contain nitrogen. The hydrophobicity became effective at around 50…
The effect of temperature and steam pressure on the vaporization and corrosion of silica was studied by measuring weight loss as a function of time. The reaction rate increased exponentially with temperature up to 1200°, with a maximum rate of reaction at ∼1350°C. Above this temperature the rate abruptly decreased wit…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPreparation and crystal and molecular structure of dibromo(1,4,7-triazacyclononane)copper(II)Robert D. Bereman, Melvyn Rowen Churchill, Peter M. Schaber, and Marjorie E. WinklerCite this: Inorg. Chem. 1979, 18, 11, 3122–3125Publication Date (Print):November 1, 1979Publicatio…
A series of new anisotropic magnet alloys has been developed in low-cobalt (5 - 11.5wt%) ternary Cr-Co-Fe system using a new "deformation-aging" technique that induces a strong magnetic anisotropy (Br/Bs ∼ 0.99) without magnetic field heat treatment. The prerequisite condition for the deformation-aging is a micro-stru…
Abstract Es wurde das Oxidationsverhalten der Gußwerkstoffe 1.4848, 1.4857, 2.4813 und einer 25/20/5‐CrNiSi‐Versuchsschmelze sowie der Knetwerkstoffe 1.4301 und 1.4841 in trockener synthetischer Luft zwischen 800 und 1300° C untersucht. Nur die Oxidation der Werkstoffe 1.4848 und 1.4841 erfolgte angenähert parabolisch…
The discharge reaction taking place within the confinement of an experimental analog, simulating porous electrode behavior, is examined in terms of the solution‐precipitation path for the system. A scanning electron microscopic (SEM) investigation, combined with an analytical treatment of a simplified model of nucleat…
Abstract Dimer acids are the commercial products resulting from clay‐catalyzed, high temperature polymerization of unsaturated fatty acids, usually tall oil fatty acids. The products have been commercially available since the 1950s and now, in all forms, represent 40–50 million pounds per year sales in the United Stat…
The C—H stretching and C—H bending vibrations of the methylene, α-methyl, and ester methyl groups of poly(methyl methacrylate) are discussed and assigned on the basis of the infrared spectra of its three deuterated derivatives: PMMA—CD 3 —OCD 3 , PMMA—CD 2 —OCD 3 , and PMMA—CD 2 —CD 3 . The digital analog of PMMA is o…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCrystal structure and magnetic properties of bis(.mu.-aqua)bis-.mu.-[N,N'-bis(2-hydroxyethyl)dithiooxamidato(2-)-N,O,S':N',O',S']-bis[aquacopper(II)sulfatocopper(II)]. A new example of very strong antiferromagnetic coupling between copper(II) ions far away from each otherC.…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTConformational Energies and the Random-Coil Configuration of Poly(oxypropylene)Akihiro Abe, Tsuneo Hirano, and Teiji TsurutaCite this: Macromolecules 1979, 12, 6, 1092–1100Publication Date (Print):November 1, 1979Publication History Published online1 May 2002Published inissu…
Abstract 1 H‐NMR spectra of polyisoprene were assigned using polymers of isoprene‐1,1,4,4‐ d 4 , isoprene‐1,1,5,5,5‐ d 5 , and isoprene‐4,4‐ d 2 polymerized with various catalysts. The methylene‐proton signal at 2.1 ppm in cis ‐1,4 ‐ and trans ‐1,4‐polyisoprenes was divided into H 4 ‐ and H 1 ‐proton signals; H 4 reso…