Materials Literature
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Recently we introduced a new computational tool for the analysis of waveguide diffraction gratings based on Rouard’s method, a recursive technique used in thin-film coating design. In this paper we compare the reflectivities predicted by Rouard’s method with those found by using the ideal mode expansion of coupled-mod…
Abstract A series of partially neutralized poly(acrylates) has been prepared, and reactions occurring on heating them at 250°C have been studied. It was found that different chemical processes occurred at this temperature, depending on the nature of the counter ion. Univalent cations gave films of excellent chemical r…
It is shown that electrochemical observations (over a small range of overpotentials) which may be subject to relatively small (< 1%) experimental inaccuracies can lead to results that are seriously (> 100%) in error when analysis of the results is performed using traditional analysis techniques.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPolarized, single-crystal, electronic spectral studies of hexachlorodicuprate(2-): excited-state effects of binuclear interactionSylvie R. Desjardins, Dean E. Wilcox, Ronald L. Musselman, and Edward I. SolomonCite this: Inorg. Chem. 1987, 26, 2, 288–300Publication Date (Prin…
The authors investigated the impulse breakdown characteristics of coated high-voltage electrodes in SF6 gas with a varying nonuniform factor, electrode area, and coating material. From the viewpoint of the relation between breakdown stress and the stressed electrode area, it was clarified that with coated electrodes,…
Bioactivity-guided fractionation of a CHCl3 extract of Stizophyllum riparium has afforded six new compounds, namely, the triterpene esters, 3 beta-hydroxy-24-transferulyloxyurs-12-en-28-oic acid, 3 beta-hydroxy-24-cis-ferulyloxyurs-12-en-28-oic acid, 3 beta, 19-dihydroxy-24-trans-ferulyloxyurs-12-en-28-oic acid, and t…
The perchlorotriphenylmethyl radical (2) acts as a clathrate host for benzene, halogenobenzenes, and 1,4-dioxane giving inclusion compounds with different stabilities; the structure of (2)·C6H6, established by X-ray diffraction, shows the guest molecules located in channels between the hosts.
The crystal structure of kalsilite at 950°C has been determined by high temperature single crystal methods. In the process of heating, the X-ray powder pattern of kalsilite changes at 865°C, which can be ascribed to the phase transition of this mineral. According to the drastic apparition of the extinction of hhl, 1-o…
Abstract The structure of the title complex has been determined by the single-crystal X-ray diffraction method. A crystal of Er2C12H8O16Cl18, F. W. 1380.86 is triclinic, with the space group of P\bar1, a=12.787(8), b=15.209(7), c=11.685(7) Å, α=102.24(5), β=114.43(5), γ=70.59(4)°, Z=2 (for the dimer formula), Dx=2.36,…
trans-[OsVI(tmc)(O)2]2+(tmc = 1,4,8,11-tetramethyl-1,4,8,11-tetra-azacyclotetradecane) and trans-[OsVI(CN)4(O)2]2– are emissive in the solid state and in fluid solutions at room temperature (τ∼ 1.0–1.5 µs); the 3Eg state of trans-[OsVI(tmc)(O)2]2+ is a powerful one-electron oxidant {[OsVI(O)2]2++ e–→[OsV(O)2]+, Ef0 >…
Zircaloy in boiling water reactor (BWR) systems often exhibits, besides slight uniform corrosion, a nodular type of corrosion. Highest nodular corrosion was found with materials never β-quenched during their fabrication, whereas β-quenched materials generally showed an improved behavior. Results of nodule thickness me…
The properties of the angle resolved photoemission spectra from nearly free electron (NFE) metals have been investigated for a wide range of electron densities, from K (1.4 × 10 22 electrons/cm 3 ) through Be (24.7 × 10 22 electrons/cm 3 ). These data are used in conjunction with theoretical calculations to illustrate…
In order to determine the deuterium diffusion coefficient in metals, we have developed a new technique, ion driven permeation in which the implantation of energetic ions is utilized instead of gaseous charging or electrochemical charging for deuterium permeation.The time sequence of deuterium permeation rate caused by…
Microstructures of hot work tool steels, AISI H13, HIO, and H19 tempered after quenching at various cooling rates are studied for improvements of the toughness of these steels. It is found that the development of upper bainite with decreasing rate of quenching is accompanied by the following microstructural changes.1)…
Abstract not Available.
The use of a fibrin adhesive to ensure the fixation of skin grafts in difficult situations was evaluated in 27 patients. Fibrin adhesive offers a fast and safe alternative to conventional methods, especially when dealing with concavities or other surfaces where it is impossible to obtain adequate fixation and prevent…
Interface reactions between polyimides and metal/metal oxide surfaces are proposed on the basis of their acid-base strengths. These hypothetical interface reactions are discussed for the purpose of understanding adhesion at these interfaces. Some experimental data are presented to support the hypothesis as it relates…
(1987). The Insertion of ‘Twist’ into Yarns by Means of Air-jets. Part II: Twist Distribution and Twist-insertion Rates in Air-jet Twisting. The Journal of The Textile Institute: Vol. 78, No. 3, pp. 204-219.
Adhesive behaviors of porcelain, quartz and alumina were investigated using a silane coupling agent and ferric chloride together with 4-META/MMA-TBB resin. Using 4-META/MMA-TBB resin, porcelain pretreated with silane and ferric chloride showed bond strength above 20MPa after 2, 000 thermal cycles. Silane primed quartz…
An additive effect on the pressureless sintering of boron carbide is investigated. Some additive species, Al, TiB2, and AlF3 show a remarkable densification effect upon B4C. The Al-addition provides the best sintered body with the highest bulk density of 95% by means of the firing condition of 2200°C for 30min under A…