Materials Literature
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Submerged arc weld materials have been employed in a study of the effects of manganese and carbon on phosphorus segregation and intergranular embrittlement. The equilibrium grain boundary segregation behaviour of these elements during aging has been studied in two different boiler shell weld materials, which differ ma…
Abstract Paper presented a t the NATO A dvanced Study Institute, May 4-1 4 , 2001 (Kas, Turkey) The structure of the glass forming system (V 2 O 5 )x -(Na 2 O • P 2 O 5 ) (1-x) , (x = 0-0.4), has been inves tigated using Raman spectroscopy. The stretching vibrations of various phosphate groups, connected to phosphoru…
Abstract A series of hydrophobically modified poly(acrylic acid)( R H ‐PAA) were synthesized by solution copolymerization of acrylic acid with a small amount of alkyl acrylate (alkyl chain with a length of 8, 12, 14, 16, 18) and their solution properties were also systematically studied. It was found that the random d…
Polyphosphates of the compositions LiPO3, Li4H(PO3)5, and LiMn(PO3)3 were prepared by the reactions of Li2CO3 and MnO2 with melts of polyphosphoric acids at 240–350°C, and their crystal structures were established. The unit-cell parameters are a = 13.074 Å, b = 5.4068 Å, c = 16.452 Å, β = 99.00°, sp. gr. P2/n; a = 6.6…
Lithium titanate (Li2TiO3) is one of the most attractive tritium breeders for breeding blanket in fusion reactor from view points of low tritium inventory, high chemical stability and so on. The data on the performance of a blanket mockup with pebble bed under neutron irradiation is needed for the design of breeding b…
Polycrystalline Pb(Zr,Ti)O 3 (PZT) films were fabricated at a low temperature of 450°C by the electron cyclotron resonance plasma-enhanced chemical vapor deposition (ECR PECVD) method. Stoichiometric PZT films with the pure perovskite phase could be obtained over a wider range of deposition conditions on Pt/RuO 2 hybr…
A subbandgap light scattering investigation of vitreous arsenic trisulfide, $v\ensuremath{-}{\mathrm{As}}_{2}{\mathrm{S}}_{3},$ fibers subjected to external elongation stress has been undertaken in order to elucidate the photoinduced fluidity effect [H. Hisakuni and K. Tanaka, Science 270, 974 (1995)] in a microscopic…
Experimental solubilities are reported at 25.0°C for ferrocene dissolved in 46 different organic nonelectrolyte solvents containing ether-, chloro-, hydroxy-, ester, methyl-and t-butyl-functional groups. Results of these measurements, combined with previously reported ferrocene solubilities taken from the chemical lit…
Etodolac (ETO) is a nonsteroidal antiinflammatory drug (NSAID) that exhibits analgesic, antipyretic and antiinflammatory activities and is practically Insoluble in water. The solubility of ETO in four different cosolvents; ethanol, propylene glycol, polyethylene glycol 400, and glycerol, three sugars; sucrose, sorbito…
Aromatic polyamides containing fluorine, chlorine, bromine and iodine have been prepared, and they have been evaluated by their mechanical and thermal properties. The method of polycondensation in solution at low temperature revealed as a very appropriate route to attain high molecular-weight halogen-containing polyis…
An experimental study of the oxidation of pyrrole in the absence and in the presence of NO has been performed. The experiments were conducted in an isothermal quartz flow reactor at atmospheric pressure in the temperature range 700–1500 K. The influence of the temperature, air excess ratio (corresponding to rich, stoi…
We describe a vector scanning system to reduce charging effects during scanning electron microscope (SEM) imaging. The vector scan technique exploits the intrinsic charge decay mechanism of the specimen to improve imaging conditions. We compare SEM images obtained by conventional raster scanning versus vector scanning…
The fluid mechanics of the movement of the contact line region for non-Newtonian fluids has been analyzed using the method of Joanny and de Gennes [C. R. Acad. Sci., Ser. II: Mec., Phys., Chim., Sci. Univers Terre 299, 279 (1984)] where under lubrication theory approximation the rate of viscous dissipation is equated…
Current–voltage (I–V) and impedance measurements of oxidized metal/porous silicon (PS)/c-Si sandwich structures were performed at various temperatures. The I–V dependence at relatively small bias was found to be determined by the resistance of the PS layer. When the reverse bias is increased the injection of carriers…
Abstract A corrosion protection coating from polyimide/polyaniline (PI/PAn) blend was prepared by solution blending and the anti‐corrosion property of this coating was studied with electrochemical impedance spectroscopy technique. The results show that PAn can react with PI to form chemical bonds between these two pol…
The modulus spectroscopy of potassium lithium niobate (KLN) crystals was investigated in the frequency range from 100 Hz to 10 MHz and temperature range from 30°C to 600°C. The dielectric anomaly with a broad peak was observed around 430°C. The a c conductivity is frequency dependent at low temperatures such as σ=σ dc…
The solid solubility of the aliovalent dopants Fe 3+ and Nb 5+ in the BaBi 4 Ti 4 O 15 compound, a member of the family of Aurivillius bismuth‐based layer‐structure perovskites, has been studied using quantitative wavelength‐dispersive spectroscopic microanalysis (SEM/EPMA) in combination with X‐ray powder diffractome…
Stoichiometric In2S3 films were prepared by thermal evaporation technique onto clean glass substrates. According to X-ray investigations, the as-deposited films were in amorphous state. Both the ac conductivity and dielectric constants were measured in the frequency range 100 Hz−100 kHz at different temperatures. Diff…
The mesophase behaviour of the lanthanum(III) alkanoates [La(CxH2x+1COO)3] (x =3-19) has been investigated by hot-stage polarizing optical microscopy, differential scanning calorimetry and high-temperature X-ray diffraction. Lanthanum(III) butyrate monohydrate shows no mesomorphism, whereas for the remaining short cha…
Contaminants in cotton fibers cause yam regularity defects that alter their structure. The effect of these alterations on yarn strength is discussed with particular focus on seed coat fragments (SCF), one of the primary cotton contaminants from the fiber to the finished product. This paper presents the results of an e…