Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
Abstract The submicroscopic morphology of uniaxially deformed isotactic polypropylene films has been examined by x‐ray diffraction, infrared dichroism, birefringence, sonic modulus, small‐angle light scattering, density, and electron microscopic techniques. Several new theoretical relationships and techniques have bee…
The Preisach model for magnetic particle interaction in recording tapes is used as a basis for the calculation of the frequency response of the ac biased magnetic recording process. These results are compared with experiment. Since there are numerous other factors present in normal tape recording which affect the freq…
Article Löslichkeit und Diffusionsgeschwindigkeit von Wasserstoff und Deuterium in Einkristallen aus Nickel und Kupfer was published on May 1, 1965 in the journal International Journal of Materials Research (volume 56, issue 5).
The phase equilibrium relations hips for a major portion of the Cd,O,,-TiO, sys te m we re de te rmined In a ll', from a stud y of soltd state reaction s and from fusion characteris ti cs Three 'nt d ' t
The ground state splitting of Fe 3+ in a strong trigonal field is studied theoretically in order to account for the uniaxial anisotropy of hexagonal crystal BaFe 12 O 19 . The spin Hamiltonian D S z 2 is derived as the second-order contribution of the spin-orbit interaction, the crystal field being treated as a part o…
An apparatus based on the method of Jain and Krishnan was developed for property measurements in the temperature range from measurable radiant emission to the thermal stability limit of metallic materials. Apparatus and experimental techniques for cylindrical specimens with length‐to‐diameter ratios >4 are describe…
Abstract Important advances have recently been made in the chemisty of the lower oxides of sulfur, both in the preparative sphere and by the application of modern physical methods of investigation. In this paper the knowledge gained to date on the compounds SO, S 2 O 2 , S 2 O, S 2 O 3 , and the polysulfur oxides is r…
In a previous paper, a system of nonlinear differential equations and boundary conditions governing the macroscopic behavior of arbitrarily anisotropic nonconducting magnetically saturated media undergoing large deformations, was derived. The derivation utilized the classical procedure of defining field vectors and de…
Phase relations in the system zirconium‐carbon were established by DTA, X‐ray, and metallo‐graphic methods. Only one phase, a monocar‐bide with the NaCl structure, was found. The low‐carbon phase boundary for the monocarbide contains 38.5 at.7, carbon between 1900’and 3300OC. The carbon‐rich boundary between 2850” and…
Twinned crystals of low cristobalite from Ellora, Hyderabad, India were found to have space group P 4 1 2 1 (or P 4 3 2 1 ) and cell dimensions a = 4.978 and c = 6.94 8 Å. A three-dimensional full-matrix least-squares refinement based upon 110 integrated intensities which were corrected for the effects of twinning, co…
A theoretical analysis, based on the Fuchs-Sondheimer formalism, is given of the conductivity of single-layer, thin metallic films in which the scattering of the conduction electrons is different at each surface. The electron-surface scattering is described by the parameters P and Q which represent the fractions of co…
Dislocation loops have been observed in iron foils irradiated with protons or Fe+ ions of energy 150 kev. Those produced by irradiation with Fe+ ions are shown to lie on {100} planes and to be pure edge in character. They are normally square, with the sides in the corresponding <100> directions, and are formed by the…
Abstract High molecular weight polybenzazoles were prepared by self‐polycondensation of 3,4‐diaminobenzoic acid, 3‐amino‐4‐hydroxybenzoic acid, 4‐amino‐3‐hydroxybenzoic acid, and 4‐amino‐3‐mercaptobenzoic acid, or their inorganic salts in a solution of polyphosphoric acid. These polybenzazoles showed an excellent ther…
Abstract Polyvinyl acetate precipitates from aqueous solution as it is formed. When potassium persulphate is used as initiator the polymer suspension is stable and constitutes the principal locus of reaction. The effect of reaction conditions on the rate of polymerization and on the number of particles formed has been…
Abstract Polybenzoxazoles of high molecular weight were prepared easily by the solution polycondensation of 3,3′‐dihydroxybenzidine dihydrochloride or 3,3′‐diamino‐4,4′‐dihydroxybiphenyl dihydrochloride with both aromatic and aliphatic dicarboxylic acids in polyphosphoric acid. Polybenzothiazoles were prepared from 3,…
Three prominent paramagnetic absorption systems have been detected in single crystals of $\ensuremath{\alpha}$ aluminum oxide (${\mathrm{Al}}_{2}$${\mathrm{O}}_{3}$) following reactor irradiation with and without subsequent low-temperature gamma-ray irradiation. The most prominent system has an asymmetric, slightly an…
Photoemission measurements have been made at photon energies between 7.2 and 11.6 eV on single crystals of CdS which had been cleaved in high vacuum at pressures ${10}^{\ensuremath{-}9}$ Torr. Additional measurements have been made from 6 to 21.2 eV using surfaces cleaved and tested in pressures of about ${10}^{\ensur…
The magnetostriction of Tb single crystals has been measured from 4 to 350\ifmmode^\circ\else\textdegree\fi{}K in applied fields up to 30 kOe by strain-gage methods. The temperature dependence of the four magnetostriction constants has been determined under the assumption that the magnetic moment remains in the basal…
The magnetic behavior of very dilute (0.1%) iron impurities in Cu, Ag, Au, V, Nb, Ta, Mo, W, Rh, and Pt has been studied by the M\"ossbauer effect in ${\mathrm{Fe}}^{57}$ for applied fields to 62 kOe and temperatures from 0.5 to 300\ifmmode^\circ\else\textdegree\fi{}K. For V, Nb, and Ta the hyperfine field at the impu…
It has been possible in favorable cases to measure the intensities of the infrared bands of CO adsorbed on different ZnO and supported Cu, CuO, and Pt catalyst surfaces. For weak, reversible adsorption at room temperature, giving rise to the bands in the frequency region 2132–2212 cm−1, a unique correlation between in…