Materials Literature
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This paper studies the effect of some pollutant agents in urban environments -gaseous SO2, acid rain and solid particles- on carbonate and siliceous building stones with different petrophysic characteristics. The selected environments have been London, Garston (UK) and Burgos (Spain) and the exposed materials have bee…
The employment of timber in structures in Spain was hurting of the nonexistence of accepted calculation procedures. The recent adoption and publication of the Eurocode 5 compels to the employment of the characteristic values of the material in the structural calculation by the method of the finite elements. This repor…
Polaron binding energy and effective mass are calculated for semiconductors with wurtzite crystalline structure from the first order electron-phonon corrections to the self-energy. A recently introduced Frohlich-like electron-phonon interaction Hamiltonian which accounts for the LO and TO polarizations mixing due to t…
An accurate model for the axial divergence aberration function has been implemented within a fundamental-parameters fitting procedure for diffraction profiles from a conventional X-ray powder diffractometer. The aberration function for axial divergence is derived from the geometrical dimensions of the diffractometer i…
For the development of optimized coating‐substrate systems one needs fast and reliable methods which permit the characterization of both intrinsic corrosion resistance and porosity. In the present paper electrochemical procedures for the determination of porosity are developed and applied to the study of Ti and TiN co…
Abstract Melt rheology and mechanical properties in linear low density polyethylene (LLDPE)/low density polyethylene (LDPE), LLDPE/high density polyethylene (HDPE), and HDPE/LDPE blends were investigated. All three blends were miscible in the melt, but the LLDPE/LDPE and HDPE/LDPE blends exibiled two crystallization a…
The preparative method, characterization and magnetic susceptibility χmeasurements versus temperature T of the heavy fermion transition metal oxide LiV_{2}O_{4} are reported in detail. The intrinsic χ(T) shows a nearly T-independent behavior below ~ 30 K with a shallow broad maximum at about 16 K, whereas Curie-Weiss-…
This book gives an in-depth look at the theory of thermal expansion of solids and the techniques for measuring this property. The individual chapters are written by 13 recognized experts on all aspects of the subject who collectively represent almost 500 years of professional activity. While the data presented in the…
The discovery of Ductile Iron in 1948 gave a new lease on life to the cast iron family. By combining the castability of gray iron and the toughness of steel, Ductile Iron compelled a wide recognition as an economical choice for high performance complex ferrous parts. Fifty years of research and development J.t have le…
We present a formulation of the nematic liquid crystal hydrodynamics based on the tensor order parameter, with the spatial variations of both the director and the scalar (uniaxial and biaxial) order parameters explicitly taken into account. New length and time scales are shown to arise that can be important for the sw…
It is shown theoretically that the buckling of the CuO$_{2}$ planes in certain cuprate systems can be explained in terms of an electric field across the planes which originates from different valences of atoms above and below the plane. This field results also in a strong coupling of the Raman-active out-of-phase vibr…
The layered compound ${\mathrm{La}}_{2\ensuremath{-}2x}{\mathrm{Sr}}_{1+2x}{\mathrm{Mn}}_{2}{\mathrm{O}}_{7}$ $(x=0.3)$ consists of bilayers of metallic ${\mathrm{MnO}}_{2}$ sheets separated by insulating material. The compound exhibits markedly anisotropic magnetoresistance at temperatures well below the three-dimens…
Other| December 01, 1998 X-ray photoelectron spectroscopic study of a pristine millerite (NiS) surface and the effect of air and water oxidation Daniel L. Legrand; Daniel L. Legrand INCO, Central Process Technology, Copper Cliff, ON, Canada Search for other works by this author on: GSW Google Scholar H. Wayne Nesbitt;…
A general model for the axial divergence aberration function has been developed for a conventional X-ray powder diffractometer equipped with either incident-beam and/or diffracted-beam Soller slits. In this model, the axial divergence function is generated from the geometrical dimensions of the diffractometer system,…
Carbon nanotubes have two major assets for potential technological applications: their electronic properties and their extremely high mechanical strength, which make them excellent components of composites. Essential for such composites is the existence of favorable surface interactions between the nanotubes and the h…
Epoxy resins absorb significant quantities of moisture, typically 1 to 7% by weight for various formulations, which can greatly compromise their physical properties. It is known that polarity of the epoxy is a significant factor in determining the ultimate moisture uptake. However, the contribution from molecular topo…
The magnetization switching dynamics of biaxial single-domain homogeneous ferromagnetic particles, in which the two easy axes are perpendicular to each other, is simulated using a 4-state clock model. A zero-field mapping of the statics between the symmetric 4-state clock model and two decoupled Ising models is extend…
Thirty-nine morphologically different soil bacteria capable of degrading poly(beta-hydroxyalkanoate), poly(epsilon-caprolactone), poly(hexamethylene carbonate), or poly(tetramethylene succinate) were isolated. Their phylogenetic positions were determined by 16S ribosomal DNA sequencing, and all of them fell into the c…
CdO thin films were deposited on silica glass substrates by rf sputtering. The orientation of the crystal axis in the films was changed by varying the sputtering conditions. The (100)-oriented films were annealed under various conditions to change the carrier concentration. A blueshift of the optical absorption edge w…
Recently, it has been shown that the thermoelectric figure of merit is strongly enhanced in quantum wells and superlattices due to two-dimensional carrier confinement. We predict that the figure of merit can increase even further in quantum well structures with free-surface or rigid boundaries. This additional increas…