Materials Literature
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Pseudo-poly(amino acids) are synthetic biodegradable polymers made from natural metabolites. The use of natural metabolites for the synthesis of biomedical materials originated from the concern about the possible toxicity of the degradation products of biodegradable materials. Here we present the surface characterizat…
A model has been proposed to calculate the thermal conductivity of composite made from parallel fibres aligned at an angle to the heat flow direction. The model after verification has been modified for a twisted fibre assembly. From the modified model, the longitudinal thermal conductivity values of fibres are calcula…
Abstract Modification of the interface changes the viscoelastic response of crystalline polymer blends. For incompatible systems, usually one or more additional tan δ (mechanical loss) peaks appear which reflect the embrittlement of the material. Upon proper compatibilization, the additional peaks disappear and the ma…
The reasons for anomalous growth in the thermopower of metal borides at high temperatures is analyzed. It is shown that this behavior of thermopower cannot be explained within the present models of charge transfer in disordered semiconductors. The anomalous growth of thermopower in polar materials can be interpreted b…
Abstract The problem of galvanic coupling of mild steel to carbon fibres in aqueous solutions relevant to environmental exposure cases is attacked in this research. Acid sulphate and near neutral chloride and bicarbonate solutions are considered. The application background of this investigation is the mechanical joini…
The Rietveld method can be combined with the addition method to determine the absolute quantities of the phases treated by Rietveld refinement plus the quantity of phase(s) not treated by it (amorphous or unobserved). If q is the added proportion of a defined phase already present in the sample, and a 1 and a 2 its re…
Article Redetermination of the crystal structure of potassium trans-(dioxo) tetra(hydroxo)osmate(VI), K2[Os(OH)4(O)2] was published on December 1, 2002 in the journal Zeitschrift für Kristallographie - New Crystal Structures (volume 217, issue JG).
A dense, bulk ceramic of Ti3SiC2 containing impurities of TiC and Ti5Si3 was fabricated by hot pressing elemental powders of Ti, Si, and C. X-ray diffractometry, scanning electron microscopy, and transmission electron microscopy were used to determine the crystalline phases and observe the microstructure of sintered c…
The dielectric constant of an incipient ferroelectric EuTiO 3 exhibits a sharp decrease at about 5.5K, at which the antiferromagnetic ordering of the Eu spins simultaneously appears. This fact indicates the existence of a coupling between the magnetism and dielectric properties of EuTiO 3 . We propose a possible coupl…
Here we report Raman scattering studies of ropes of Single-walled carbon nanotubes (SWNTs) grown by a high CO pressure process. Five samples from five different batches were studied as a function of excitation wavelength. Three of these samples exhibited Raman spectra similar to that found for SWNTs made by pulsed las…
Room Temperature Scanning Micro-Hall Probe Microscope Imaging of Ferromagnetic Microstructures in the Presence of 2.5 Tesla Pulsed Magnetic Fields Generated by an Integrated Mini Coil, Sandhu, Adarsh, Masuda, Hiroshi, Oral, Ahmet
The reactions of nitromethane (CH 3 NO 2 ) on a thin-film oxide grown on Mo(110) are investigated to gain insight into the role of nitromethane in the catalytic reduction of NO by methane. Using a combination of temperature programmed reaction and infrared reflection-absorption spectroscopy, we find that nitromethane…
In this paper, silk fibroin (SF)/polyurethane (PU) blend films were fabricated to develop a new biomaterial for biomedical applications. These blend films were prepared using formic acid as a cosolvent, and structural characteristics and properties of blend films were investigated. FTIR results suggested that there wa…
Article Innovative Einsatzstähle als maßgeschneiderte Werkstofflösung zur Hochtemperaturaufkohlung von Getriebekomponenten was published on December 1, 2002 in the journal HTM Journal of Heat Treatment and Materials (volume 57, issue 4).
Potentiodynamic anodic polarisation measurements have been carried out on type 316L stainless steel (as a reference material) and on alloys 33 and 24 in a simulated flue gas desulphurisation environment in order to assess the localised corrosion resistance. The results showed that the pitting corrosion resistance was…
The test results from an earlier investigation by the author on the mechanical behaviour of a low nickel nickel-copper alloy exposed to a solution of 3·5%NaCl + 10%MgCl2 with and without ammonia indicated that the presence of 1% ammonia alters the failure mode and affects the load bearing capacity of the material. In…
LU2O7S12, monoclinic, C\Um\ (No. 12), a = 6.762(2) , b = 8.835(3) , c = 4.711(2) k, = 101.99(4), V= 275.3 3 , = 2, Rgf(F) = 0.019, wRretfF 2 ) = 0.045, T= 293 K.
Phase-modulation scatterometry is a metrology technique for determining, by means of a phase modulator as a key device, the parameters of gratings. The main source of error to be dealt with are the fluctuations of the phase-modulation amplitude. The grating zeroth-order reflectance modulated by the phase modulator is…
Abstract The use of non-wovens as absorbent products is increasing, as is the consumption of cotton fibres as raw materials for these products. This paper presents some results concerning the obtaining of absorbent non-woven products made from cotton fibres. A fibrous web was formed by the superposition of cotton band…
A simple method for measuring the ceramic-ceramic and metal-ceramic bond strength was presented, by which uniaxial tensile stress normal to the interface or shear stress in the interface can be produced using uniaxial compression load on a cross-bonded sample. Both tensile and shear bond strength were obtained by this…