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。
Except for minor editorial revisions this paper is the reproduction of a report written for the Metallurgical Laboratory of the University of Chicago almost ten years ago, after the experimental production of a divergent chain reaction. This report has now been declassified and can be published. The present first part…
ABSTRACT The byssus threads, periostracum, hinge, ground substance of the shell, and the supporting material of the gills of Mytilus edulis, have been examined by physical, chemical, and histochemical means. The byssus threads, periostracum, and hinge have been shown to consist of a quinone-tanned protein. The byssus…
An attempt has been made to explain the observed viscous behavior of bulk polymers. It is found that the viscosity and diffusion may be represented by a theory which takes into account the coupling together of the molecules. Two equivalent treatments are given. One makes use of a segmental friction factor in the same…
No disponible
No disponible
No disponible
No disponible
No disponible
No disponible
No disponible
Experimental values for the solubility of carbon in nickel in the range 700°C to 1300°C yield the equation lnS=2.480−4,880/T, where S is the solubility in grams of carbon per 100 grams of nickel. Values obtained for the diffusion coefficient in the same range fit the equation lnD=0.909−20,200/T, where D is in cm2 per…
Abstract Polythene subjected to irradiation in the Harwell B.E.P.O. pile becomes cross-linked, and a new type of plastic is produced which does not melt at about 115° C, nor dissolve in hot organic compounds. The mechanical properties are also altered, especially above 115° C, when the plastic shows rubber-like elasti…
Vitamin A and retinene, the carotenoid precursors of rhodopsin, occur in a variety of molecular shapes, cis-trans isomers of one another. For the synthesis of rhodopsin a specific cis isomer of vitamin A is needed. Ordinary crystalline vitamin A, as also the commercial synthetic product, both primarily all-trans, are…
The magnetic spectrum of a sintered ferrite, previously studied by the authors at room temperature and found to contain an rf resonance, attributed to domain wall displacements, and a microwave resonance, attributed to domain rotations, has now been observed at 77\ifmmode^\circ\else\textdegree\fi{}K, 195\ifmmode^\circ…
A qualitative analysis of Gallagher's measurements of plastic flow in germanium and silicon is made. It is reasonable to suppose the slip occurs by motion in {111} planes of dislocations having a Burger's vector equal to an allowed translation in the ($1\overline{1}0$) direction. It is suggested, following current tho…
Abstract A comparison is given between flow in liquids, creep in crystals and intercrystalline slip. A further comparison is made between latent heats of fusion, shear moduli and the energies to form vacancies.
Article Untersuchungen in den ternären Systemen Magnesium-Kupfer-Zink, Magnesium-Nickel-Zink und Magnesium-Kupfer-Nickel was published on November 1, 1952 in the journal International Journal of Materials Research (volume 43, issue 11).
Umwandlungsverhalten von Stählen mit 1. 0,86% C und 2,0% Mn, 2. 0,31% C, 0,9% Mn und 3,6% Ni, 3. 0,95% C, 0,9% Mn und 5,0% Cr, 4. 1,2% C und 3,2% Mn in der Zwischenstufe bei gleichgehaltener Temperatur. Beschleunigung der Umwandlung des Austenits in der Zwischenstufe durch Keime von α‐Eisen. Deutung der Umwandlungsvor…
A treatment is given of the aberrations caused by the extension of the X-ray source, specimen and receiving slit normal to the plane of the camera or spectrometer. A detailed examination is made of the aberrations which occur: ( a ) when the height of the specimen is the sole cause, and ( b ) when the vertical diverge…
Experimental methods have been developed for creating and observing single spherical cavities in water and certain organic liquids Rapid photography permits motion analysis to be made The cavities show several cycles of expansion and collapse during their lifetime of a few milliseconds At each volume minimum a sharp p…