Materials Literature
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Increasing demands on the quality and specific properties of polymers imply increasing demands on the mineral fillers used in composite materials. They are expected not only to reduce the cost of production but also improve the mechanical properties of the composites or endow them with new features, e.g. thermostabili…
Chitosan (CHI) has been complexed with polyacrylic acid (PAA) in the presence of hydroxyapatite (HAP) to prepare composites intended for bone substitute applications. Thermogravimetric analysis of the composite showed that the presence of HAP had little effect on the degradation profile of the polyelectrolyte complex…
Yttria stabilized zirconia (YSZ) electrolytes, subjected to high current densities, develop significant damage. This paper characterizes the damage that develops from the anode side, in YSZ used in an oxygen pump configuration. The damage is in the form of vacancy loops, precipitates formed on dislocations, pore devel…
Effect of B addition on the Si and Mn selective surface oxidation behavior of low carbon steels was investigated, by glow discharged spectroscopy, secondary electron microscopy, transmission electron microscopy, and auger electron spectroscopy, after recrystallization annealing. The oxides composed mainly of Si and Mn…
Grain boundary resistivity in zirconia systems can significantly affect total conductivity below 800°C, The influence of starting powders on the total conductivity is investigated for the 8 mol% yttria-stabilized zirconia polycrystals prepared from powders synthesized by three different methods and from two commercial…
The photophysical properties of polymer-dispersed liquid crystal systems, containing naphthalimide dye as fluorescent units are reported. Investigations have been carried out on some 1,8- naphtalimide derivatives both in isotropic and anisotropic media, and their photophysal properties have been described. The orienta…
Reduction of Mercury Loss in Fluorescent Lamps Coated with Thin Metal-Oxide Films , Hildenbrand, V. D., Denissen, C. J. M., van der Pol, A. J. H. P., Hendriks, A. H. C., van der Marel, C., Snijders, J. H. M., Tamminga, Y., Brongersma, H. H., Viitanen, M. M.
In this study, tensile and abrasive wear performances of two different quality as-cast ductile irons have been examined at various temperatures between 25 and 600°C. Tensile tests were carried out with a strain rate of 3×10−4/s. Wear tests were performed under a compression stress of 5.7 N/mm2, by rubbing samples on 1…
In this research, the spheroidal graphite cast iron melt was produced by using 7 kinds of steel scraps, the shredder scrap, the surface treated steel sheets, the magnetic steel sheets, the high strength steel and others. The influences of the steel scraps on microstructures and mechanical properties were studied. Zinc…
In order to understand the role of TiO2 in the deactivation mechanism of an active RuO2–TiO2 coating, an additional TiO2 layer was introduced in the support coating interphase of regular Ti//[RuO2–TiO2 anode in one case and on the surface of the coating in the other. The electrochemical behavior of these, with TiO2 en…
The X-type dimer of lithium phthalocyanine adopts a significantly different electronic structure from those of the α- and β-type dimers, which leads to a different absorption spectrum and magnetic properties for the X-polymorph compared to those of the α- and β-polymorphs.
This book discusses the fundamentals and recent advances in fatigue analysis. It contains special emphasis on crack mechanics and fatigue design of structural details. The book is intended for engineers, research staff, professors and graduates engaged in fatigue-preventing design and survey, fatigue studies of materi…
unctionalization of polyethylene has been performed by means of homogeneous grafting reactions of maleic anhydride initiated by free radicals. Benzoyl peroxide, azobisisobutyronitrile, and dicumylperoxide have been used as free radical sources and their efficiency has been compared. The effects of the solvent, time an…
A couple of Rietveld-analysis programs, RIETAN, for angle-dispersive diffraction and time-of-flight neutron diffraction have been extensively used for structural studies of many compounds. The history of their developments is briefly reviewed. The latest versions, RIETAN-2000 for angle-dispersive diffraction and RIETA…
A number of recent papers have dealt with such properties of clay minerals as their compositions, assemblages, contents and crystallinities,which can reflect the periodic climate changes of the mineral sources and help to reconstruct paleoclimate. Due to the sensitivity of the clay minerals, however, any climatic infl…
Accurate non-isothermal finite-element simulation of the forming of woven impregnated composites requires a precise knowledge of material behaviour. Consequently, a constitutive model to predict the shear force of impregnated woven composites has been developed. The main objective of the model is to predict shear forc…
The hysteresis phenomenon inherent to redox processes of Electronic Conducting Polymers (ECP) has been studied. Hysteresis was divided into two classes: i) dynamic hysteresis, containing a kinetic and an ohmic component and ii) stationary or thermodynamic hysteresis. A mathematical analysis was performed on the dynami…
The micro- or nano-structured mold used for polymer embossing typically must be coated with an anti-adhesion material to reduce its interaction with the embossing. The mold is typically made by nickel sulphamate electroforming. For the anti-adhesion coating to adhere to the mold, the nickel mold surface must be clean…
The effects of hydrogen on the electronic structure of the passive film on iron were investigated by photoelectrochemical methods. It was found that hydrogen increases the magnitude of the photocurrents from the passive films formed at all investigated potentials, and decreases the bandgap energies of the passive film…
We have measured the silicon tracer diffusivity (30Si) in single crystalline 2/1-mullite parallel to the crystallographic b- and c-axes, respectively. No significant difference between the b- and c-directions was found within the experimental error of 30%. An activation enthalpy of 612 kJ mol−1 and a pre-exponential f…