Materials Literature
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The theory of photoelectrochemical imaging using a scanning laser microscope is presented in outline: the idea of a photocurrent transfer function whose parameters might be spatially variable is introduced and a distinction is made between continuous-scan and step-scan methods of rastering the light spot. In the conti…
Recent action by ASTM Committee E 49.05 has renewed progress in addressing quality and reliability issues for materials databases. Three major thrusts, the development of a guide for the development and management of materials databases, standardization of specific quality indicators for data and databases, and standa…
Impact experiments were performed with Charpy specimens and with large bend specimens made from a ferritic pressure vessel steel. All specimens were side-grooved and fatigue-precracked. Different amounts of ductile crack extension up to 16 mm were achieved by varying the available impact energy. The measured hammer lo…
Hydrothermal experiments have been carried out to find the equilibrium conditions for the reactions: 2kaolinite = pyrophyllite + 2diaspore + 2water (1) kaolinite + 2quartz = pyrophyllite + water (2) As starting materials, a natural mixture of kaolinite-pyrophyllite-boehmite was used for the experiments. Determination…
The 10 to 13 wt% Cr-containing ferritic and ferrito-martensitic stainless steels are seen as promising reactor core structural materials for fast breeder reactors and first wall materials for fusion reactors. The studies involved diffraction electron microscopy and X-ray microanalysis on the 10 to 13 wt% Cr-containing…
Abstract We have calculated the temperature dependence of the direct and indirect band gaps in silicon and germanium. The electron‐phonon potential as well as the phonon frequencies and eigenvectors are calculated consistently within the rigid quasi‐ion model. Comparison is made with experiment and with the theoretica…
We fabricate a new small hollow−cathode Penning SPS with a multiaperture extraction for the anode N1 production study. It was found, that the anode surface conversion of superthermal and fast hydrogen atoms into H− ions is effectively realized in the Penning SPS in the case of an increased, cesiated anode surface. (AI…
The pyrolysis of Fe-tetraphenylporphyrin chloride (FeCITPP) has been examined by FTIR spectroscopy. Two series of samples, with and without additional carbon black, were studied. It was found that the decomposition of FeCITPP occurred in a very narrow range of temperature. The mixture of FeCITPP and carbon decomposed…
Abstract The purpose of this study is to evaluate the effect of some well‐known flame retardants on the ignition behaviour of cotton fabric. Two types of flame retardants acting in different phases (e.g. condensed phase and gas phase) were used. At low add‐on of the retardant acting in the condensed phase the ignition…
Abstract Electrical breakdown of polyphenylene sulfide (PPS) films, one of the high‐temperature engineering plastics, has been investigated. The results show that the dc breakdown strength is lower than the impulse one, and that the difference in electric strength between dc and impulse becomes wider as the sample thi…
Abstract The phase equilibrium in the systems Na 2 SeO 4 CdSeO 4 H 2 O and Na 2 SeO 4 MnSeO 4 H 2 O were studied and it was established that new phases were obtained — double salts with a composition: Na 2 Cd(SeO 4 ) 2 · 2 H 2 O and Na 2 Mn(SeO 4 ) 2 · 2 H 2 O. The fields of phase equilibrium of the double salts i…
A novel ‘picket-fence’ porphyrin, 5,10,15,20-tetrakis[o-(tetrahydro-2-thenoylamino)phenyl]porphyrin (H2L) with ligating tetrahydrothiophene rings disposed perpendicular to the porphyrin plane has been synthesised. Its zinc(II) derivative, [ZnL], binds two silver(I) ions co-operatively with a dissociation constant of 4…
In this chapter we introduce the basic electrical terminology and account for the wide variation of observed electrical conductivities and charge transport processes. Our treatment is introductory and necessarily simplified; the reader is referred to more advanced texts during the discussion.
Abstract
The isomer shift S and quadrupole splitting \ensuremath{\Delta} of the 35.5-keV $^{125}\mathrm{Te}$ level in M${\mathrm{Te}}_{2}$ (M=Ti, V, Cr, Fe, Co, and Ni) were measured at 80 K. M${\mathrm{Te}}_{2}$ with pyrite- and marcasite-type structures exhibit a linear relationship between S and \ensuremath{\Delta}, while t…
Azaferrocene reacts with chloro[5,10,15,20-tetrakis(pentafluorophenyl)porphyrinato]iron(III) to give a low-spin iron(II) porphyrin, [FeII(tfpp){Fe(C5H5)(C4H4N)}2], the crystal and molecular structure of which has been determined; while air-stable in the solid state, in solution it loses co-ordinated azaferrocene and (…
The diatom community that inhabits both the water-column and the benthos of tidepools positioned along an intertidal gradient, during late spring and early summer is described. Samples from the water-column and benthos of five tidepools, ranging from 1.5 to 6.5 m, were collected on five dates, and the diatom community…
The surface properties of a film made from a novel latex product, surface-hydrophilic elastomer latex (SHEL), were studied by the sessile-drop contact-angle technique. The advancing contact angle of water on a SHEL film was very low, indicating that the surface was hydrophilic. The surface hydrophilicity was sustained…
Oil-soluble copper salts such as copper naphthenate have been evaluated as additives to mineral oil, synthetic hydrocarbon, and polyol ester base stocks in the Penn State microoxidation test. These tests were carried out at 225°C under test conditions which show good agreement with the behavior of automotive crankcase…
This volume is devoted to solidification of polymers in general; crystalline, liquid crystalline, and amorphous polymers, including oriented polymers and the effects of pressure and processing are dis