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。
Many ceramic materials can be applied as coatings by flame‐spraying rods made from these materials. Aluminum oxide coatings, stabilized zirconia coatings, and zircon coatings have been studied in detail with regard to their structure and their physical and thermal properties.
Scattering cross sections, scattering coefficients and specific turbidities are calculated from the Mie equations for α = 0.2(0.2)7.0(1)15 and m = 1.05(0.05)1.30; and, in addition, for α = 22(2)32; 39(1)41 and m = 1.05, for α = 16(1)21 and m = 1.10, for α = 7.2(0.2)15.2 and m = 1.20. Thus, the calculations cover virtu…
Possible sources of the anisotropy energy are investigated for ferromagnetic ferrites, i.e., Ni-, Co-, Fe- and Mn-ferrites. The cubic anisotropy energy which arises from the anisotropy of the crystalline field acting on magnetic ions and is described by the function of the spin operator of one ion identically vanishes…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTChemistry and Spin Resonance Spectroscopy of Radicals from Thioaromatic Compounds1Antonino Fava, P. B. Sogo, and Melvin CalvinCite this: J. Am. Chem. Soc. 1957, 79, 5, 1078–1083Publication Date (Print):March 1, 1957Publication History Published online1 May 2002Published inis…
The activation field of BaTiO3 c-domain crystals may be calculated from an experimental determination of the frequency dependence of the coercivity. The ratio of activation fields above and below the orthorhombic transition is equal to the respective ratio of coercivities. The decrease in coercivity in passing through…
Abstract The mechanism of the conductance of the electric current through a carbon black dispersion is still a problem which has not been completely solved. Rubber is an insulator and forms a homogeneous liquid phase, while carbon black is a semi-conductor and forms a dispersible solid phase. Mixtures of these two sho…
Synopsis Starting from the basis that the direction of sliding of one particle relative to another is, in general, inclined at an angle to the direction of the applied shear stress, a theory is developed to account for the difference between peak and residual stresses in terms of the volume expansion of the mass durin…
Current theories of "single-domain" ferromagnetic particles compare the free energy in a state of uniform magnetization with that in an arbitrarily chosen state of nonuniform magnetization. In this paper, the comparison is made between an initial uniform state and all neighboring states, uniform or nonuniform, as an i…
A study of the effect of Li substitution on the electrical properties of the oxides MnO, CoO, NiO, and CuO has been made. It has been found that (1) the activation energy for conduction increases abruptly near the antiferromagnetic Curie point; (2) as Li is added the activation energy and resistivity initially decreas…
Mixtures of 0.8 moles of CaO per mole of SiO 2 plus Al 2 O 3 were prepared from lime, kaolin, and tripoli (microcrystalline quartz); the amounts of SiO 2 to Al 2 O 3 were varied to give from 0.2 to 20.7% Al 2 O 3 by weight of dry solids. After hydrothermal treatment (170° to 175°C.), the products were examined by diff…
The experiment reported in this paper was designed to obtain data on the dynamics of a nonrotating, conical-nosed projectile penetrating randomly-packed sand. Position versus time measurements for the projectile in sand were obtained by means of a photographic-electronic chronograph developed for the purpose. The stri…
Abstract One of the more important advances in rubber science during the past twenty years has been the development of quantitative theories describing the elastic properties of pure-gum vulcanized rubbers. As a result it is now possible to account for their equilibrium stress-strain behavior with considerable success…
The present paper investigates by experiment and theory the mechanisms governing work-hardening, work-softening and slipband formation in face-centred cubic metals. The rapid hardening stage (stage II) of the stress-strain curve is investigated by flow-stress measurements at different temperatures, combined tensile an…
Share Icon Share Twitter Facebook Reddit LinkedIn Reprints and Permissions Cite Icon Cite Search Site Citation B. D. Cullity, R. Smoluchowski; Elements of X‐Ray Diffraction. Physics Today 1 March 1957; 10 (3): 50. https://doi.org/10.1063/1.3060306 Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends…
A theory is presented which describes the development of surface grooves at the grain boundaries of a heated polycrystal. The mechanisms of evaporation-condensation and surface diffusion are discussed with the use of the Gibbs-Thompson formula and the assumption that the properties of an interface do not depend on its…
The details of an observed absorption spectrum are shown to depend upon the thickness of the absorber. This effect is present, at least in principle, regardless of the type of radiation involved. It is discussed here specifically for x-rays, and specifically for the neighborhood of an absorption edge. Measurements of…
A modification of the diffraction theory for a disordered substitutional solid solution containing atoms of different sizes gives a more accurate and simpler expression for the size effect diffuse scattering. A comparison of the theory with measurements of the diffuse scattering for Cu/sub 3/Au near hkl = 200 shows go…
Thermoelectric power measurements have been performed on powdered nickel oxide in the temperature range 60–220°C, under different gas atmospheres. These include: oxygen, hydrogen, carbon monoxide, carbon dioxide, nitrous oxide, helium, and water vapor, at different partial pressures. The extent and direction of the ob…
The ability to form a glass, i.e., the ability to form bonds which lead to a vitreous network, appears periodically in the classification chart of the elements. Thus simple glasses containing only one kind of atom are formed by the elements of Group VI of the periodic table (O, S, Se, and Te). Only these elements are…
Compressional creep tests were run on single crystals oriented so that the direction of compression was along the c axis. Two activation energies of creep were found: approximately 24 500 cal/mole above 120°C and 12 000 cal/mole below this temperature.