Materials Literature
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Transformation sequences in a NiTi shape memory alloy after deformation and subsequent annealing were studied using various methods. Low temperature annealing of the deformed alloy caused that the R-phase preceeded the martensitic transformation. The R-phase formation during both cooling and heating depends strongly o…
Abstract We report scanning Auger microscopy (SAM) and x‐ray photoemission spectroscopy (XPS) analysis of a Roman lead pipe ‘flstula’, the main emphasis being placed on the comparison between the surface and interface chemical composition of the joint and of the rest of the pipe. We find that the ‘tertiarium,’ a Pb–Sn…
The Structure of Semiconductors. The Technology of Semiconductor Devices. The Assessment of Semiconductors by Electrical Techniques. The Assessment of Semiconductors by Diffraction. Optical Assessment of Semiconductors. Assessment of Semiconductors by Ion Beam Techniques. Assessment of Microscopy and Imaging.
Abstract Poly(ethylene oxide)‐grafted butyl rubbers (IIR‐ g ‐PEOs), which were synthesized from potassium salt of polyethylene glycol monomethyl ether (PEGM) and chlorinated butyl rubber, were found to behave like thermoplastic elastomers. The poly(ethylene oxide) (PEO) content of these amphiphilic polymers was ca. 10…
Four major sol gel or metallorganic decomposition routes for the processing of lead zirconate have been established. The requirements and criteria for successful processing are reviewed, and the concept of a characteristic volume over which the gel is stoichiometric is introduced. The need for solution species of comp…
Rutile-phase TiO 2 films were epitaxially grown on Si(100) substrates by oxidizing epitaxial TiN films grown by KrF pulsed excimer laser deposition. The TiO 2 film was (110)-oriented and composed of two domains perpendicular to each other in the plane. The electrical resistivity at 2.5 V and the dielectric constant at…
Abstract To graft polymers with controlled molecular weight and narrow molecular weight distribution, the grafting of polymers onto ultrafine silica surface by the termination of living polymer cation with amino groups introduced onto the surface was investigated. The introduction of amino or N ‐phenylamino groups ont…
Abstract The chemical reaction at high temperature (above 200°C) between PC and PMMA has been very recently highlighted. However, no clear reaction mechanism has been proposed to explain this phenomenon. We suggest a reaction mechanism following two steps. The first step consists of hydrolysis of the ester bonds of th…
Abstract A study was made of miscible polymer blends of deuterated polystyrene (d‐PS) and tetramethylbisphenol‐A polycarbonate (TMPC). The Flory interaction parameter χ was obtained from the relation between mutual and tracer diffusion coefficients, D̃ and D * , which were measured by forward recoil spectrometry. The…
Structural characteristics and electrooptical properties of Sn-doped In 2 O 3 (ITO) films were investigated in terms of Sn concentrations from 5.34 to 8.99 (Sn/In at.%) with changing oxygen partial pressure and substrate temperature during deposition, in spite of using an ITO target with the same Sn concentration ( 7.…
Octahedral liquid crystals based upon diketonate complexes of Fe+3, Mn+3, and Cr+3 are reported. These materials display columnar phases with ≥12 sidechains and an ordered smectic phase with 6 sidechains.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTBoron Nitride Matrixes and Coatings Obtained from Tris(methylamino)borane. Application to the Protection of Graphite against OxidationB. Bonnetot, F. Guilhon, J. C. Viala, and H. MongeotCite this: Chem. Mater. 1995, 7, 2, 299–303Publication Date (Print):February 1, 1995Publi…
A method is described for the measurement of the rotational viscosity y 1 in nematic liquid crystal cell assemblies. Theoretical formulas to determine y 1 from transient current are developed by considering both director rotation and conduction of impurity ions. The pretilt angle and the product of the drift mobility…
In this time-resolved study of vibrational dynamics of deuterated surface hydroxyls at acid sites in the zeolite Mordenite, we investigate the O–D T1 vibrational lifetime and transient band shifts. It is shown that after infrared excitation of the stretching mode of a surface hydroxyl, the excess energy is rapidly dis…
In order to provide biodegradable poly(hydroxy acid)s by a simple process, fundamental studies on the polycondensation of α-hydroxy acids by enzymes and polyethylene glycol (PEG)-modified enzymes in organic media were carried out. The oligomer formation by unmodified hog liver esterase proceeded well using glycolic ac…
A Fourier analysis of existing and potentially complex refractive index profiles is often useful in the resolution of thin-film design problems. Applications of a frequency-filtering technique, which consists of the suppression of undesired spatial frequencies from the refractive index profiles, are described. A new,…
Polymer reference interaction site model theory with the new molecular closures is employed to numerically and analytically study structurally and interaction potential symmetric binary blends. Both the compressibility and free energy routes to the thermodynamics are studied and the issue of thermodynamic consistency…
Solubility and Phase Behaviour of Polyacrylate Scale Inhibitors and Their Implications for Precipitation Squeeze Treatment M.R. Rabaioli; M.R. Rabaioli Eniricerche SpA Search for other works by this author on: This Site Google Scholar T.P. Lockhart T.P. Lockhart Eniricerche SpA Search for other works by this author on…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNickel(IV) Bis-(3)-1,2-dicarbollide as an Acceptor Molecule in the Synthesis of Electrically Conducting Charge Transfer ComplexesPeter A. Chetcuti, Walther Hofherr, Andre Liegard, Grety Rihs, Guenther Rist, Hugo Keller, and Damian ZechCite this: Organometallics 1995, 14, 2,…
Abstract The thermomechanical behavior of poly(bisphenol A carbonate) (PC) undergoing cold‐drawing (necking) over a large range of temperature and strain rate has been studied. The cold‐drawing of PC has been described from a material particle perspective in terms of true stress and strain relationships. The isotherma…