Materials Literature
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In titanium alloys subsurface fatigue crack initiation occurs apparently without the existence of any defects such as inclusion or pore. We investigated subsurface crack initiation and sub-crack for Ti- 6Al-4V alloys at cryogenic temperatures, and discussed the growth mechanism of microcrack.As the maximum stress was…
Effect of plastic films contact (polyethylene, polypropylene and butylated hydroxy anisole (BHA) and butylated hydroxy toluene (BHT) incorporated polyethylene) on the storage stability of refined sunflower oil and groundnut oil was studied at 37°C. The changes in peroxide value, thiobarbituric acid and total carbonyls…
The world's first practical applications of 500 kV XLPE (cross-linked polyethylene) cables took place in 1988 at the Shimogo power station of the Electric Power Development Co. Ltd., and the Imaichi power station of the Tokyo Electric Power Co. Inc.. Research and development work on the cables had been conducted since…
The dislocation core structure of an (α/2) [110](1·0) edge dislocation has been computed in NiO using an atomistic description of the lattice. A shell model potential was used to describe the ionic interactions. The binding energies of the dislocation with vacancies of different charge states as well as with electroni…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStudies of model urethane reactions and cure in polyurethanes by UV absorption and fluorescence spectroscopyXiao Yan Huang, Weiching Yu, and Chong Sook Paik SungCite this: Macromolecules 1990, 23, 2, 390–398Publication Date (Print):January 1, 1990Publication History Publishe…
2014 Le bicristal de silicium contenant le joint de flexion 03A3=9 (122) [011] est utilis comme matriau modle pour tudier, l'aide de la microscopie lectronique haute rsolution, les mca- nismes de dformation l'chelle atomique. Les mystres des tout premiers stades de dformation du joint ont t lucids. On a montr que les…
Dynamic differential thermal analysis (DTA) data on a series of polyethylene (PE) samples containing known contents of two primary (phenol and amine) and two secondary (thioester and phosphite) antioxidants are presented. It is shown that the dynamic method, in which the temperature of the start of an exothermal oxida…
Partial structure factors of GeO2 glass are estimated from the anomalous X-ray scattering data at the Ge K absorption edge and the conventional neutron diffraction results, and calculations of the partial radial distribution functions are presented for Ge–O and O–O and Ge–Ge pairs.
Patterns of periderm ontogeny were studied in vigorously growing branches and leaders of Calotropis procera (Ait.) Ait. f., Carissa grandiflora A. DC., Ficus elastica Roxb., Ficus religiosa L. and Melia azedarach L. In all of these five woody species the periderm develops in clear polar patterns, with inhibitory zones…
Phase retardance of a liquid-crystal-based, electrically tunable wave plate as a function of voltage and incident light intensity at 10.6 microm is measured using the Stokes-MacCullaugh ellipsometry technique. At intensities of up to 900 W/cm(2), device performance is found to be driven by thermal effects and not opti…
Experimental studies were carried out on a direct production of Fe–RE (RE=Nd, Sm) and Co–RE alloys from the rare earth oxides by a reduction-diffusion (R-D) method. In the R-D process, a rare earth oxide is reduced by calcium between 1173 and 1473 K in the presence of iron or cobalt particles and the reduced rare eart…
Novel colourless side-chain methacrylate copolymers exhibiting relatively narrow charge-transfer bands at 335 nm and second-order optical nonlinearities up to d33= 4.3 pm V–1(at 1064 nm) have been synthesized and characterized.
This work demonstrates the usefulness of flow microcalorimetry for surface characterization of metal foils (aluminum) and polymer [poly (ethylene-co-acrylic acid)] fibers. It shows that the polymer to aluminum adhesion is dominated by Lewis acid/Lewis base type interactions. These interactions are predictable from the…
Humidity-induced movements were studied on biaxially stretched samples of sized and gessoed fabric and on films of size and gesso without fabric. In-plane strains were detected through observation of crack patterns formed in a brittle coating applied on the samples. Different patterns recorded during drying and humidi…
Intercalation of phosphorus-doped SnSe2 with bis(cyclopentadienyl) cobalt {Co(η5-C5H5)2} produces superconducting SnSe2{Co(η5-C5H5)2}0.33 with a critical temperature of 6 K; magnetisation measurements show a hysteresis loop with a maximum at 40 G, indicating type II superconducting behaviour; the lower critical field…
In order to develop low activation high chromium ferritic steels for fusion reactors, the effects of 0.05-0.16 wt% Ta and 0.05 wt% Nb alloyings, and heat treatments on elevated temperature strength, toughness and microstructures of 0.1C-9Cr-2W-0.2V-0.04N steels were investigated. Normalizing and tempering conditions w…
Abstract Supersaturation is the driving force for crystallization from solution. For design and operation of crystallization processes, it is necessary to apply a set of criteria for the determination of appropriate or even optimum supersaturation. In this paper we present and discuss the results of our experimental a…
The plasma-arc melting process has reacently been noted for the refining and degassing of several metals, by applying hydrogen to the plasma-generating gas.In this work, deoxidation and decarburization of crude tantalum, prepared by carbon-reduction smelting of Ta2O5 with Ar plasma-arc heating, has been investigated b…
Tests of austenitic stainless steel clad U-xP-10Zr fuel (x=o, 8, 19 wt. %) to peak burnups as high as 18.4 at. % have been completed in the EBR-II. Fuel swelling and fractional fission gas release are slowly increasing functions of burnup beyond 2 at. % burnup. Increasing plutonium content in the fuel reduces swelling…
The laser conditioning of dielectric thin film HR coatings has been studied as a practical method for the improvement of the damage thresholds of large area (1.1 m dia.) high power 1064 nm laser mirrors on the LLNL 120 kJ, 100 TW Nova laser system. Both HfO2/SiO2 and ZrO2/SiO2HR coatings were conditioned by rastering…