Materials Literature
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Abstract A study on cotton fibers swollen slack at ambient temperature in different concentrations of LiOH and KOH indicates that fibers swollen in KOH have higher disorder. Conversion to cellulose II results from swelling in both the reagents, although, with KOH swelling, it begins at a lower concentration. Further,…
Abstract The cycloparaffins (CH 2 ) 36 and (CH 2 ) 60 were crystallized epitaxially from solutions on the (001) face of the NaCl crystal at various temperatures. Two types of crystals, so‐called edge‐on and flat‐on crystals, were separately obtained depending on crystallization temperature. The temperature for obtaini…
The authors provide step-by-step procedures for determining the appropriate surge arrester characteristics and insulation levels for both transmission and back-to-back HVDC (high-voltage direct current) systems. Information is included on insulation coordination practices in existing HVDC systems, such as typical syst…
TlNO 3 is a ferroelastic crystal belonging to the orthorhombic Aizu species m 3 mFmmm ( ss ) at room temperature. Lattice-parameter measurements by X-ray powder diffraction at various temperatures are reported for this crystal. Spontaneous-strain components are calculated from the lattice parameters. The spontaneous s…
Modifications to the computational scheme of the existing slab geometry gamma-ray transport code ASFIT are introduced to facilitate the inclusion of coherent scattering contributions. The revised code is tested with two model problems and subsequently is used to investigate quantitatively the transport effects of cohe…
Abstract A study was carried out of the development of orientation during processing of conventional blow molded bottles made from low density polyethylene (LDPE), linear low density polyethylene (LLDPE), and high density polyethylene (HDPE). The level of molecular orientation was found to be relatively low in all of…
High-temperature crystal structures of BaBiO 3- x ( x =0∼0.2) were studied by in-situ neutron and X-ray powder diffraction techniques using controlled oxygen pressures. Rietveld profile analysis of the neutron data from BaBiO 3 at 900 K has revealed that the structure is cubic with large anisotropic thermal vibration…
The scanning reference electrode technique is a recent development which enables in situ studies to be made of many forms of localised corrosion. This technique has been utilised in the design and evolution of an apparatus which can detect and monitor small potential variations associated with active pitting in FV 448…
Abstract The corrosion behavior of stainless steel (405) specimen in 5 M H2SO4 solution has been investigated potentiostatically at four temperatures in the range 303–323 K. The inhibiting effects of ethanethiol (EtSH), dimethyl sulfide (Me2S), and dimethyl disulfide (Me2S2) have thereafter been tested for four inhibi…
Hot-line diagnosis is needed to avoid breakdowns of XLPE (cross-linked polyethylene) cables due to water trees. The authors superposed a low DC voltage on an AC commercial voltage, measured the DC component of the current which passed through the insulation, and discovered that the DC component had a close relationshi…
Abstract Studies were performed to determine the toughness characteristics of composites prepared from modified addition‐type polyimides, using Celion 6000 graphite fiber as the reinforcement. The polyimides were prepared from aromatic diamines containing flexibilizing ether connecting groups. The composite flexural a…
A series of pressurized water reactor spent-fuel samples from Turkey Point Unit 3 have been oxidized at temperatures between 140 and 225°C in air atmospheres with dew points between 14.5 and -70°C, using a thermogravimetric analysis system. Tests lasted between 400 and 2100 h. At the conclusion of a test, the atmosphe…
An experimental and theoretical study is presented in this paper on the corona characteristics of conductor bundles under dynamic overvoltages. Measurements have been made in the outdoor test cages of Institut de recherche d'Hydro-Québec (IREQ) on two bundles, under conditions of fair weather and heavy rain, for stead…
Electrode polarization in polymeric dielectrics is considered, and a simple model that describes the processes phenomenologically and accounts for the observable manifestations of this type of polarization is suggested. Notwithstanding the fact that certain significant parameters characterizing the model are obtained…
Spin reorientation in ${\mathrm{Nd}}_{2}$(${\mathrm{Fe}}_{1\mathrm{\ensuremath{-}}\mathrm{x}}$${\mathrm{T}}_{\mathrm{x}}$${)}_{14}$B (T=Al, Si, Ti, Cr, Mn, Co, Ni, and Cu) with x=0.05 and 0.10 was investigated. The substitution of Fe by T results in a decrease of spin reorientation temperature (${T}_{\mathrm{SR})}$. T…
Results of HVAC and HVDC (high-voltage alternating current and direct current) artificial contamination tests on station post insulators are reported. The tests were conducted using the clean fog method at various severity levels. The contamination behavior of station post insulators with semiconductive glaze was also…
Rayleigh–Brillouin scattering measurements on various multicomponent halide glasses and some selected oxide glasses were performed. The Brillouin linewidth measurements, the Brillouin intensities, and Brillouin frequency shifts allowed us to calculate the phonon attenuation, Pockels elasto-optic coefficients, and the…
Precipitation in a high nitrogen austenitic stainless steel of the Nitronic series has been studied. Above a critical nitrogen concentration, cellular precipitation is observed together with formation of Cr2N as a general precipitate and intragranular precipitation of Z phase (Cr2Nb2N2). The nature of cellular precipi…
A p-band theory calculation is reported on a single layer of graphite, the nomenclature and methods of molecular orbital theory being used. Interaction between non-nearest neighbours at increasing distances is included to determine the extent of significant electron interaction. A criterion to determine this limit is…
The photoluminescence (PL) and electroluminescence (EL) from single‐crystal Mn‐doped centered at 580 nm was investigated. The PL was quenched by surface modification with poly(vinylferrocene). The effect of p H and temperature on the EL of in aqueous and butyronitrile solutions upon reduction of peroxydisulfate ion wa…