Materials Literature
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Abstract A dislocation theory of cracks, which takes account of elastic-plastic and other non-linear modes of deformation, is used to discuss the geometrical and physical conditions for unstable fracture. The importance of discontinuous cracking in providing an unstable mode of plane strain, semi-brittle, tensile frac…
A survey is presented of the observed hyperfine fields at nuclei of impurities dissolved in metallic iron. Estimates are made from atomic hfs constants of the contributions to internal fields that might be expected on the basis of conduction-electron polarization. The observed fields in several heavy elements are roug…
The temperature and field dependences of the magnetostriction and thermal expansion of single-crystal dysprosium metal were measured in the paramagnetic, spiral, and ferromagnetic regions. In the paramagnetic temperature range from the N\'eel point to room temperature, the thermal expansion is normal and the six lowes…
Received 24 February 1965DOI:https://doi.org/10.1103/PhysRevLett.14.575©1965 American Physical Society
The complex dielectric constant $\ensuremath{\epsilon}(\ensuremath{\omega})={\ensuremath{\epsilon}}_{1}+i{\ensuremath{\epsilon}}_{2}$ and associated functions are derived by application of the Kramers-Kronig relation to reflectance data for graphite obtained in the energy range to 26 eV. It is possible to divide the o…
Abstract The reaction of lithium aluminum hydride forming mercaptan with disfulfides and mercaptan as well as hydrogen sulfide with polysulfides has been applied in order to characterize the structure of the crosslinks in the case of unaccelerated vulcanization of natural rubber with sulfur. The mercaptans formed were…
The principal structural features of spunbonded products are described, and these structural features are related to physical properties. of the materials and to textile performance.
This paper describes an apparatus which was designed for the evaluation of high temperature thermoelectric materials; it enables rapid measurement to be made of the factors controlling thermoelectric figure of merit, these being thermal conductivity, Seebeck coefficient and electrical resistivity, over the temperature…
Get PDF Email Share Share with Facebook Tweet This Post on reddit Share with LinkedIn Add to CiteULike Add to Mendeley Add to BibSonomy Get Citation Copy Citation Text Jerome S. Laufer, "High Silica Glass, Quartz, and Vitreous Silica," J. Opt. Soc. Am. 55, 458-460 (1965) Export Citation BibTex Endnote (RIS) HTML Plain…
Abstract The state of co‐ordination of aluminium ions in synthetic glasses in the system CaO–Al 2 O 3 –SiO 2 was studied by determining the effects of varying the alumina content (from 1 to 7 moles) on the density and refractive index of glasses of composition 10 CaO, 8 SiO 2 , n ‐Al 2 O 3 (CaO/SiO 2 ratio 1.17:1). Th…
Abstract Measurements of compressive stress relaxation for molded polytetrafluoroethylene were carried out at different temperatures over the range 60–150°C., at 5°C. increments under a small strain (less than 0.3%). By the application of the so‐called Ferry's reduction method, three master curves were obtained with g…
Masaki Ohta, Masatoshi Sugiyama; Meso-ionic Compounds of the 1,3-Dithiole Ring System, Bulletin of the Chemical Society of Japan, Volume 38, Issue 4, 1 Apr
Time‐temperature characteristics were established for the formation of a silica‐rich glassy microphase in a silicate glass. Plots of temperature versus nucleation time produced curves similar to those determined by Hillig for a glass‐crystal transformation. These experiments showed that a nucleation step was required…
Electronically conducting polymers have been prepared by treating hexa- chlorobenzene with sodium at 300°, using sodium chloride as a diluent. The products, presumably polybenzenes, have resistivities of 0.2-25 ohm cm depending on the amount of sodium used; less crosslinked polymers similarly prepared from 1,2,4-tri-c…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCatalytic Dissociation of Nitrogen DioxideL. L. Wikstrom and Ken NobeCite this: Ind. Eng. Chem. Process Des. Dev. 1965, 4, 2, 191–195Publication Date (Print):April 1, 1965Publication History Published online1 May 2002Published inissue 1 April 1965https://pubs.acs.org/doi/10.…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCatalyzed Nitric Oxide Reduction with Carbon MonoxideR. A. Baker and R. C. DoerrCite this: Ind. Eng. Chem. Process Des. Dev. 1965, 4, 2, 188–191Publication Date (Print):April 1, 1965Publication History Published online1 May 2002Published inissue 1 April 1965https://pubs.acs.…
Single crystals of graphite have been irradiated with neutrons to doses of up to 7·6 × 1019 n.v.t. (Ni) at temperatures up to 900°c and examined in the electron microscope. The damage is resolved on irradiation at temperatures of ∼250°c, and consists essentially of interstitial dislocation loops. Only a few per cent o…
The character of a planar tensile stress (observed) in evaporated gold films has been investigated by means of bending method and X-ray diffraction. It has been found that stress increases with increasing film thickness in films thinner than 1000 Å and approaches to a certain values of the order of 10 9 dyn/cm 2 in th…
Abstract Acetal copolymers prepared from trioxane and ethylene oxide consist of polyoxymethylene segments with oxyethylene units distributed in the chain. These oxyethylene units profoundly affect the thermal and chemical behavior of the polymer. The presence of the oxyethylene units renders the copolymer amenable to…
The structure of LizSO4. H20 has been refined by the method of least squares with three-dimensional X-ray diffraction data measured by counter techniques from an approximately spherical crystal. Unitcell dimensions are a=5.454, b=4857, c=8.173 /~, and fl=107 22, and the space group is P21. Although a final R of 38 % w…