Materials Literature
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We investigate a geometrically exact generalized isotropic continua of micromorphic type in the sense of Eringen. The two-field problem for the macrodeformation φ and the ”affine microdeformation” P ∈ GL(3,R) in the quasistatic, elastic case is presented in a variational form. The relative elastic stress-strain relati…
A new fossil marine diatom resting spore morpho-genus Gemellodiscus Suto gen. nov. is described using samples from DSDP Site 338 in the Norwegian Sea, Sites 436 and 438 in the northwest Pacific and the onland Newport Beach Section, California. Gemellodiscus is characterized by possessing a valve with setae of several…
This paper describes the effects of the grain boundary misorientation on the radiation induced segregation (RIS) in proton irradiated 304 stainless steels. Experimentally, four test conditions were used for the 304 stainless steel specimens: (1) As-received (AR) with enriched Cr at grain boundary, (2) AR + 1 dpa proto…
Several compounds with high birefringence and having tolane structure were synthesized. For a high polarizability, isothiocyanato (NCS) terminal group was introduced. Another goal of this study was reduction of melting point and smectic phases by introduction of fluorine as lateral substituent. The transition temperat…
A short literature survey is presented on health and environmental issues in relation to the production and use of fibre crops. Next a short introduction to Life Cycle Analysis (LCA) is given and the various commonly applied methods for quantifying ecological impacts are discussed in short. The available literature on…
The electroluminescence (EL) properties of the organic electroluminescent devices (OELDs) using three kinds of fluorescent polyimides, ODPA/DCHM (HFPI-1), 10FEDA/DCHM (HFPI2), and P2FDA/DCHM (HFPI-3), for light emitting layers were investigated. The HOMO energy levels of HFPI-1 and HFPI-2 were determined as 6.7 and 6.…
The Cu(II) aggregate in [Cu(9)(cpida)(6)(MeOH)(6)].6(MeOH)[H(3)cpida = 2-(carboxyphenyl)iminodiacetic acid] is made up of two weakly ferromagnetically coupled carboxylate-bridged Cu(4) units that are antiferromagnetically linked through a central Cu(II) to give a Cu(9) core with an S= 7/2 spin ground state.
Semi-solid processed 18% Cr and 27% Cr cast irons were produced by using copper cooling plate and metal mold. A series of experiments were carried out to clarify the effect of heat treatment on microstructure, hardness, wear properties, and corrosion characteristics. The results show that 27% Cr alloys possess better…
Ternary compound Ti3SiC2 has been successfully synthesized and concurrently consolidated by sintering green compact of starting powder mixture. 3Ti/SiC/C powder mixture was compacted and heated in vacuum or in Ar atmosphere at temperatures from 1573 to 1773 K for a time period ranged from 2 to 6 hours. It has been fou…
Germanium-doped zinc oxide thin films with Ge content of 0∼8.1 at% were deposited by an RF magnetron sputtering. The electrical and optical properties of the films were investigated. The Ge doping caused the reduction of resistivity of the films, and at about 3% of the Ge content showed the minimum resistivity of abou…
Binary C14 Laves phase alloy CaMg2 is expected to absorb hydrogen more than 6 mass%, when the H/M ratio reaches 2. We have found that the binary CaMg2 did not absorb hydrogen at ambient temperature and hydrogen pressure but Ni added CaMg1.8Ni0.2 which is also C14 Laves phase absorbed 6.0 mass% of hydrogen at room temp…
Siloxane chains of designated lengths can be synthesized with high yields by reacting tris(tert-butoxy)silanol alternately with dichlorosilane and silanediol.
Variation of lattice constants of Ce 1 − x M x O 2 − 0.5 x − δ ( M = Gd , Sm, Y; x = 0 , 0.1, 0.2) with temperature and oxygen ion vacancy concentration was investigated with X-ray diffraction (XRD) at 600-1000°C under various gas atmospheres. Linear thermal expansion and increase of expansion coefficient with trivale…
Cell culture models are useful tools to study the uptake of drugs across the barriers of the human body, like the intestine, the skin or the blood-brain barrier. Cell-based in vitro models not only help to reduce the number of animals used but are also much faster to perform, more cost effective and give more reproduc…
The interdiffusion experiments of Ti-rich β Ti–Al–Cr alloys have been performed in the temperature range from 1273 to 1473 K. The concentration profiles indicate that the diffusion distance of Cr is somewhat longer than that of Al in the solid solutions. The diffusion paths show S-shaped curves. The formation of S-sha…
Approximately 89 million metric t of organic chemicals and lubricants, the majority of which are fossil based, are produced annually in the United States. The development of new industrial bioproducts, for production in standalone facilities or biorefineries, has the potential to reduce our dependence on imported oil…
Hot corrosion of layered machinable ceramic coated with in air at 700-1000°C has been investigated by means of thermogravimetric analysis, X-ray diffraction, Raman spectroscopy, and scanning electron microscopy/energy-dispersive spectroscopy. The hot corrosion of was slight at low temperatures of 700 and 800°C, while…
The formation characteristics of the vertical density profile of MDF are presented herein. Results of laboratory studies indicate that the vertical density profile of MDF is formed from a combination of actions that occur both during compaction and also after the press has reached final position. The methodology, whic…
Dielectric properties of silica filled silicone rubber used for high voltage insulation are studied as a function of frequency (1 mHz - 1 MHz) and temperature 213K - 433K.. Two different polarization mechanisms are identified. The frequency dependence of the dielectric constant and loss factor is well characterised by…
Hydrogen reaction on catalytic surfaces is an important field of research in fuel cell science. The adsorption of hydrogen (deuterium) on Co(0001) and the influence of carbon monoxide and sulphur on the adsorption were studied by XPS, TDS, WF measurements and LEED. The WF increased due to D2 adsorption, revealing the…