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Metastable Fe-Cu solid solutions with Cu concentrations up to 80% were obtained by simultaneous vapor deposition of Fe and Cu on cold substrates. Alloys with less than 50% Cu are bcc and ferromagnetic, the average magnetic moment per atom being slightly higher than for simple dilution. The Curie temperature decreases…
The elastic modulus and transverse bend strength of pure, dense alumina specimens were determined as a function of grain size (1 to 250μ) and temperature (30° to 1500°C). The elastic modulus was essentially independent of grain size over the temperature range covered. The transverse bend strength for fine–grain–sized…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDilute Solution Properties of a Styrene—Methyl Methacrylate Block CopolymerSonja KrauseCite this: J. Phys. Chem. 1964, 68, 7, 1948–1955Publication Date (Print):July 1, 1964Publication History Published online1 May 2002Published inissue 1 July 1964https://doi.org/10.1021/j100…
The addition of minor amounts of MgO or NiO to Al 2 O 3 inhibits grain growth during sintering and allows the sintering process to proceed to theoretical density by maintaining a high diffusion flux of vacancies from the pores to the grain boundaries. The inhibition of grain growth is accomplished by the segregation o…
The Raman crystal spectra of KTcO4, KReO4, Na2MoO4, Na2WO4, Na2MoO4·2H2O, and Na2WO4·2H2O, and the Raman aqueous spectra of TcO4— and MoO42— have been observed. Infrared spectra of Nujol mulls of all the salts were measured in the rock salt region. Infrared spectra in the CsBr region were also obtained for Na2MoO4 and…
Ni-rich Ni-Fe and Ni evaporated polycrystalline films, the thickness of which is larger than a critical value, were found to be composed of stripe domains running parallel to the field previously applied to the films. B-H loops and magnetoresistance effect revealed that the magnetization in each domain points in one s…
Abstract A method for rapid freezing is described in which use is made of the good heat conducting properties of silver. The freezing was accomplished by bringing the tissue in contact with a polished silver surface at the temperature of liquid nitrogen either at atmospheric or reduced pressure. Helium gas flowing ove…
Abstract The effect of pH of the buffered saturating solution on the cation‐exchange capacity (CEC) of 60 Wisconsin soils was determined within the pH range 2.5 to 8.0. The relative contributions of clay and organic matter to total CEC were measured using multiple regression analyses; the independent variables were cl…
The lattice parameters of single-crystal SrTiO3 were determined by x-ray diffraction as a function of temperature from 4.2° to 300°K. In addition to the normal cubic structure three significant regions were found. From 65° to 100°K a tetragonal modification exists (c/a=1.00056), from 35° to 55°K line splitting consist…
The equilibrium pressure of the calcite-aragonite transition has been determined near 100 degrees C and is 4.35 kilobars. These data are in agreement with earlier work but conflict with the most recent determination by Simmons and Bell.
The temperature dependence of the spin-lattice relaxation time ${T}_{1}$ of trivalent rare-earth impurities in Ca${\mathrm{F}}_{2}$ has been measured at 9.6 kMc/sec using pulse saturation techniques. The rare earths investigated include Kramers ions (${\mathrm{Ce}}^{3+}$, ${\mathrm{Nd}}^{3+}$, ${\mathrm{Dy}}^{3+}$, ${…
The spectrum of Er3+ in single crystals of Y2O3 has been examined from 0.225 to 2.4 μ in absorption and fluorescence, and energy levels have been assigned. The Slater integrals and spin—orbit coupling parameter have been determined, which give the best over-all agreement between the centers of gravity of the observed…
Paramagnetic resonance of ${\mathrm{Yb}}^{3+}$ has been observed in single crystals of CaW${\mathrm{O}}_{4}$ at 20\ifmmode^\circ\else\textdegree\fi{}K and 3 cm. A tetragonal as well as two rhombic spectra were found. The tetragonal spectrum is fitted to an axial spin Hamiltonian with ${g}_{\mathrm{II}}=1.058\ifmmode\p…
Temperature dependence of the fluorescence quantum yield and decay time of several rare-earth chelates have been studied in an attempt to understand the quenching mechanisms in these compounds. It is observed that the quenching in either the ligand or the ion is reduced by lowering the amplitude of molecular vibration…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation A. B. Bestul, S. S. Chang; Excess Entropy at Glass Transformation. J. Chem. Phys. 15 June 1964; 4…
The distribution of magnetic moments in the Fe-Rh system has been investigated by the neutron diffraction technique in the composition range between 35 and 50 at.%Rh. These alloys have chemical order of CsCl type; the body-corner positions are occupied by FeI atoms and the body centers by Rh and FeII atoms. The magnet…
Abstract A transmission electron microscopy study has been made of the monoclinic to tetragonal phase transformation in thin films of zirconia. The films were prepared by the oxidation and subsequent recrystallization of zirconium foils. The transformation, which is rapid and reversible, is generally accompanied by tw…
Extraction of skin with 5M guanidine after salt and acid extraction yields a gelatin fraction which contains a greater proportion of double-chain (beta) components than can be accounted for by intramolecular cross-linking of collagen molecules. This fraction also contains a new beta-component, identified as the dimer…
Today corona measurements are used in many instances as part of testing electrical insulation materials and equipment. Also, corona tests are performed for other purposes The prerequisite for obtaining economical benefits from corona testing is a sufficient understanding of the nature of corona, its effects on materia…
In the Peace River area of northern Alberta difficulty has been encountered in adopting the new Canadian classification scheme to a series of soils which occur under similar environmental conditions but still reflect varying degrees of profile development. The variation in profile development ranges from what appears…