Materials Literature
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A molecular-level analysis that explains the differences in crazing behaviour encountered in polymeric glasses is presented. Considering the separation of molecules or segments of them as the controlling mechanism for crazing (at the initiation stage), it is found that in vinyl polymers such as polystyrene and polymet…
Understanding of the mechanism of radiation degradation of polymer molecules is essential for development of improved and new industrial processes, for radiation-induced modification of polymer properties, and for selection of polymers for use in radiation environments. This means that the detailed chemical reactions…
The results of the safety evaluation of the Blanket Comparison and Selection Study (BCSS) are presented. The safety evaluation measured the relative safety and environmental attractiveness of the final group of BCSS blanket concepts for application with either a tokamak or tandem mirror fusion reactor. Two types of bl…
The dielectricconstant variation with temperature of N-(p-n-butoxybenzylidene)p-n-butylaniline is presented in the isotropic, nematic, smectic A and smectic B phases. A new transition in the nematic phase is reported. The derived parameter, molar susceptibility anisotropy, Δσ, is also determined.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHydroliquefaction of Illinois No. 6 coal using iron pentacarbonylToshimitsu Suzuki, Osamu Yamada, Katsuhisa Fujita, Yoshinobu Takegami, and Yoshihisa WatanabeCite this: Ind. Eng. Chem. Process Des. Dev. 1985, 24, 3, 832–836Publication Date (Print):July 1, 1985Publication His…
Abstract Measurements of the linear optical birefringence are used to determine the B–T phase diagram of TbPO 4 down to 1.5 K for two principal field directions. There are three ordered phases, a simple antiferromagnetic one with the moments along the tetragonal c ‐axis below T N1 = 2.28 K, a further colinear antiferr…
The application of vanadium alloys as structural materials for the first wall or blanket of a fusion reactor will depend strongly on their compatibility with the coolants and breeding materials included in the blanket system. In the case of the use of liquid alkali metals, lithium offers the advantage of being an exce…
Treating cotton textile fabrics with phosphorus-containing flame retardant finishes reduces the flammability of the fabrics. The presence of fibers other than cotton in blended fabrics changes the burning rates and char lengths of the fabrics, as well as the nature of the resultant chars. To better understand the rela…
Abstract Ca 5 (PO 4 ) 3 OH, M r = 502.3, hexagonal, P 6 3 /m, a = 9.4207(3), c = 6.8780(2) Å, V = 528.67 Å 3 , Z = 2, D x = 3.156 Mg · m −3 , CuKα, λKα 1 = 1.54051, λKα 2 = 1.54433 Å, μ = 26.25 mm −1 , F(000) = 500, T = 294 K. The powder diffraction pattern was analysed by the Rietveld method. The parameters were refi…
Given a parabolic reflector, the maximum directivity is not always achieved by placing the feed at the focal point. Depending on the nature of the feed, the maximum directivity can be obtained by axially displacing the feed either toward or away from the reflector. For low-tapered feeds, the shift should be toward the…
Structure refinement may be considered as a minimization of a function R(χ) of a large number of refineable parameters. A new type of function incorporating phase probability distribution is proposed. The minimization of the function utilizing gradient methods requires the computation of gradient ∇R, as well as the pr…
Materials testing of S-65-B grade beryllium has been conducted in order to evaluate the use of this material for limiter surfaces in the ISX-B and JET tokamaks. Selected thermal and mechanical properties were measured at temperatures up to 700 °C. These measurements revealed that S-65-B has exceptionally high ductilit…
Composition and properties of sodium borate, aluminoborate, and aluminoborosilicate glasses are described. Electrolyte glass degradation by battery environment and chemicals and problems of thermal instability of some glasses are discussed and interpreted on the basis of glass chemistry and structure. A relationship b…
Soda‐lime‐silica glass canes were ion‐exchanged in a bent mode in a molten KNO 3 salt bath. After ion exchange and cooling, the specimens showed asymmetry of residual stresses. Measured penetration profiles of potassium showed that the maximum diffusion occurred from the tension side, the minimum from the compression…
Protein kinase activities and cyclic AMP binding capacity were investigated in human peripheral blood cells from leukemic patients and normal controls. Using [gamma 32P] ATP as phosphoryldonor, the phosphorylating activities were not found to be significantly different in either normal or leukemic cells when measured…
ABSTRACT A method for the statistical analysis of thermal process calculations is presented. First, an analysis is made of some of the uncertainties involved in thermal death time and heat penetration experiments. That information is then used to evaluate the consequences on process lethality calculations. A method is…
This paper discusses the two-dimensional problem of the diffraction of magnetoelastic shear waves by a rigid strip in an infinite elastic perfect conductor. This problem is reduced to a system of dual integral equations of which the solution provides the diffracted field. The method of steepest descent has been used i…
The high cost and lengthy preparation time of conventional ceramic bend-bar strength specimens is holding back the development of sintered silicon nitride ceramics having good high–temperature properties. The equipment now available for high–temperature sintering enables discs of high–strength sintered silicon nitride…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMetal-support effects on hydrogen and carbon monoxide heats of adsorption on titania-supported platinumM. A. Vannice, L. C. Hasselbring, and B. SenCite this: J. Phys. Chem. 1985, 89, 14, 2972–2973Publication Date (Print):July 1, 1985Publication History Published online1 May…
NMR measurements of 197 Au in Fe and FCC Co alloys with 0.1 at.% Au have been made using powdered specimens in zero external magnetic field at 1.7K. Electric quadrupole splitting has been found in the spectra. The spacing between the quadrupole-split component lines of FeAu alloy, Delta nu Q , has been determined by t…