Materials Literature
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Abstract Alloy cast irons are considered to be those casting alloys based on the iron-carbon-silicon system that contain one or more alloying elements intentionally added to enhance one or more useful properties. Alloy cast irons can be classified as white cast irons, corrosion-resistant cast irons, and heat-resistant…
Abstract Uranium is a moderately strong and ductile metal that can be cast, formed, and welded by a variety of standard methods. This article presents an overview of the processing and properties of uranium and uranium alloys with a brief overview of the principal hazards and precautions associated with processing dep…
A well-crystallized LaCrO3 powder with a primary particle size of about 1μm was synthesized through the complex precipitation process; obtaining the precipitate of complex hydroxide from an NaOH aqueous solution of Cr(NO3)3 by adding LaCl3 and then heating the precipitate up to 700°C. The LaCrO3 single-phased powder w…
The 50-Hz AC partial discharge (PD) triggered by a lightning impulse voltage of 1.2/50 mu s and breakdown characteristics under superimposed voltage conditions are studied for several modes of oil-immersed transformer insulation, representing typical combinations of mineral oil and oil-impregnated paper. It is conclud…
The corrosion resistance of zirconium in nitric acid is affected by concentration and temperature of nitric acid as well as applied potential. The purpose of this work is to study passivity and its breakdown of zirconium in high temperature nitric acid. (1) The polarization curve of zirconium in nitric acid was divide…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTemplate-controlled oligomerization support studies. Template synthesis and functionalizationKen S. Feldman, John S. Bobo, Susan M. Ensel, Yoon B. Lee, and Paul H. WeinrebCite this: J. Org. Chem. 1990, 55, 2, 474–481Publication Date (Print):January 1, 1990Publication History…
The crystal structure of synthetic Ag 2 O · 2B 2 O 3 · 2H 2 O with the structural formula Ag 6 [B 12 O 18 (OH) 6 ] · 3H 2 O was determined from single-crystal X-ray diffractometer data. The compound crystallizes in the monoclinic space group P 2 1 / c with a = 1178.4(29) pm, b = 1065.4(16) pm and c = 1011.6(9) pm, β =…
Crystals of naproxen were modified by the spherical crystallization technique to improve the compression and flow characteristics of the drug substance. A naproxen:acetone solution was added to water, and the crystals were agglomerated with either hexanol, octanol, or toluene. The resulting agglomerates were compact s…
Compounds containing a viologen linked to a porphyrin via a number (n= 4–7) of methylene groups have been synthesized and photoinduced long-range electron transfer between porphyrin and viologen was observed. The photoexcited singlet state of the porphyrin was quenched by the bonded viologen in viologen-linked porphyr…
Abstract Copolyimides with siloxane moieties in the main chain were synthesized by solution polycondensation of 1,3‐bis(3‐aminopropyl) tetramethyldisiloxane (APMS), oxydianiline (ODA) with 3,3′,4,4′‐benzophenone tetracarboxylic dianhydride (BTDA) in N ‐methyl‐2‐pyrrolidone (NMP). The adhesion properties between copoly…
Tantalum Boride powders were synthesized by the solid state reaction between tantalum and amorphous boron. Five Boride phases (Ta2B, Ta3B2, TaB, Ta3B4 and TaB2) were formed by heat treatment of the mixed powders at 1000°-1800°C for 0-120min. Formation behavior of these borides was dependent on the heat-treatment tempe…
In the course of severe light water reactor (LWR) core melt accidents, the formation and presence of water soluble compounds will affect the behavior of fission products in the primary system and in the containment. A liquid aerosol mixed with an insoluble component has an affinity to stick on surfaces. A relocation o…
Abstract The phase transition from cellulose to alkali cellulose (Na‐Cell) and the phase structure of Na‐Cell have been investigated by CP/MAS 13 CNMR spectroscopy. It has been found from the 13 CNMR spectra that both crystalline and noncrystalline components of cellulose decrease in resonance intensities in the trans…
A quantitative comparison between theory and experiment is presented for the thermoelectric power of n-type Si at low temperatures, where crystal boundary scattering of phonons is predominant. The expression for the Seebeck coefficient is obtained by simultaneously solving the coupled Boltzmann equations for electrons…
Continuous ceramic fibres have many unique properties, including high-temperature durability and high elastic modulus. Their properties make them particularly valuable for use in metal and ceramic composites for automotive, aerospace, and heat-management structural applications. This paper reviews the various fabricat…
AbstractAfter discharge from the reactor and transport to Sellafield, irradiated nuclear fuels are stored in water filled ponds before being reprocessed. BNFL has established fuel management strategies and a pond water chemistry which ensures minimal corrosion of stored fuels. BNFL's materials selection policy for its…
Abstract This article examines the embrittlement of iron and carbon steels. It describes compositional, processing, and service conditions that contribute to the problem and presents examples of how embrittlement influences mechanical properties. Embrittlement due to hydrogen is the most common form of embrittlement a…
The tinted weldments of stainless steels were investigated on their corrosion behavior in aqueous chloride solution. The oxide scale formed on the simulated HAZ of SUS316L was studied by suface analysis techniques. Generally, the pitting resistance of the HAZ with the scale was deteriorated compared with ones whose sc…
The dynamic performance characteristics of polyphase hysteresis motors are presented. A mathematical model to predict the starting and synchronization process of such motors under various operating conditions is given. The model offers a tool for studying the dynamic stability of the hysteresis motor for small-scale d…
Abstract Three distinct peaks at 80, 175, and 325°C were identified in the dynamic derivative TGA curves of PMVEMA and PMVEMAC at a 10°C/min heating rate. These peaks were attributed to free water removal, anhydride formation, and polymer degradation, respectively. The kinetics of the anhydride formation were studied…