Materials Literature
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An examination is made of the influence of the conditions of sliding on the 'dusting' wear of graphitic carbon sliding against non-graphitic carbon. Specific wear rates are essentially independent of load, speed and contact temperature over a wide range, but begin to decrease at speeds above about 10 m s -1 . At these…
The simultaneous translational and rotational brownian motions of an assembly of interacting cylindrically symmetric polar molecules are assumed to obey a generalized N-particle Smoluchowski-Einstein-Debye equation. Rigorous relations are derived between the self-rotational diffusion coefficient and the initial slopes…
The binding, or association, constants of NADP+ NADPH, and a series of structural analogues to dihydrofolate reductase from Lactobacillus casei MTX/R have been determined fluorometrically. Modification of the adenine or nicotinamide rings has little effect on the binding of the oxidized coenzyme, but the thionicotinam…
Anomalous, low-frequency Raman scattering from localized acoustic vibrations of roughness features on a metal surface are observed. The observed mode frequency shifts with excitation frequency and with the index of refraction of the surrounding medium. The shifts arise from resonant laser excitation of localized dipol…
The ${L}_{23}$ near-edge fine structure has been investigated in electron-energy-loss spectra from thin films of $3d$ transition metals and an unexpected departure from the statistical $\frac{{L}_{3}}{{L}_{2}}$ "white-line" intensity ratio of 2: 1 is reported. For Ti, a ratio of 0.7: 1 is observed, while for Fe and Ni…
Get PDF Email Share Share with Facebook Share on X Post on reddit Share with LinkedIn Add to Mendeley Add to BibSonomy Share with WeChat Get Citation Copy Citation Text Roy M. Waxier and Albert Feldman, "Piezooptic coefficients of four neodymium-doped laser glasses," Appl. Opt. 19, 2481-2482 (1980) Export Citation Bib…
The transverse magnetoresistances of high purity single crystals of MnP have been measured at a temperature of 1.5 K in applied magnetic field up to 80 kOe. The magnetoresistance exhibits sharp minima for the magnetic field along the b and c axes, which suggests the existence of cylindrical Fermi surfaces perpendicula…
The following is a discussion of the article entitled “Hydrogen Embrittlement and Hydrogen-Dislocation Interactions" by R. B. Heady, published in Corrosion, Vol. 34, p. 303 (1978) September.
A process is presented for the preparation of the electrolyte matrix, a poorly bonded assemblage of LiAlO 2 crystallites, based on the use of a fugitive reaction medium, a molten mixture of alkali chlorides. Data on the characteristics of both the reaction and the product are presented.
57 Fe Mossbauer investigations on a series of compounds described by the general formula (Fe 1-x Mn x )Sn, for 0<or=x<or=0.3, have been carried out over a temperature range of 77K to about 400K. It is found that, like FeSn, the Mn-substituted compounds retain the hexagonal B-35 structure as well as the antiferromagnet…
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Device applications are divided into two general categories ; power devices such as distribution transformers and electronic devices such as miniature transformers and sensing elements. In the case of power devices the recent thrust has been towards developing alloys with maximum Ms at minimum cost since losses are no…
Abstract Nach Literaturangaben aus Zinkchlorid und Grignardverbindungen dargestellte Zinkdiaryle enthalten, bisher unbeachtet, beträchtliche Mengen an Magnesiumdiarylen. Die näheren Verhältnisse wurden im Zusammenhang mit der Synthese von Dibenzylzink‐Derivaten des Typs magnified image untersucht. – Von den erhaltenen…
Abstract Sr 3 B 2 O 6 kristallisiert wie Ca 3 B 2 O 6 in der Raumgruppe R 3 c mit den Gitterkonstanten a 0 = 899,9 pm und c 0 = 1 248,7 pm, was anhand röntgenographischer Daten aus Pulveraufnahmen des Sr 3 B 2 O 6 und mit den Strukturdaten des Ca 3 B 2 O 6 gezeigt wird.
Abstract Thin coatings of various polyparaxylylenes were transformed into electrets by corona charging them and then overcoating with more polyparaxylylene to protect the charge layer. For such electrets, the extrapolated ten‐year use temperature depended on the thermo‐oxidative stability of the polyparaxylylene layer…
Abstract The effects of NaOAc removal of carbonates, H 2 O 2 removal of organic materials, and sodium citrate-bicarbonate-dithionite (SCBD) removal of iron oxides upon the X-ray powder diffraction (XRD) characteristics of clay minerals present within weathered volcanic ash deposits were examined. All pretreatments of…
The T, E-diagram of lead hafnate-PbHfO3 in the range of -180°C -+180°C has been established for the first time. It has been shown that besides the two previously known antiferroelectric phases in lead hafnate in a high electric field there are three more ferroelectric phases. which probably are isomorphous to the thre…
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 G. Hass, J. B. Heaney, W. R. Hunter, and D. W. Angel, "Effect of UV irradiation on evaporated ZnS films," Appl. Opt. 19, 2480-2481 (1980) Export Citati…
Abstract Blends of polystyrene and poly(2,6‐dimethyl‐1,4‐phenylene oxide) that cover the entire compositional range have been subjected to the action of singlet oxygen from microwave discharge, dye‐sensitized reaction, and photochemical oxidation. With the applied analytical technique, which consisted of infrared (IR)…
Successive phase transitions in the mixed crystal with perovskite structure (1-x)ABO3+xA′B′O3 are discussed on a phenomenological basis. After a short review on the experimental facts, a simple scheme is proposed to predict the phase diagrams of mixed crystals when the model parameters of constituent substances are kn…