Materials Literature
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Abstract Films of particulate polyimide‐silica hybrids were produced by a sol‐gel process and were examined in terms of morphological structure and fracture properties at different temperatures, varying from 20 to 250 °C. The fracture toughness characteristics were studied by the “Essential Work of Fracture” method us…
Abstract The equal channel angular pressing (ECAP) of the AZ91 magnesium alloy was tested from 553 K to 693 K. The initial grain size of the investigated alloy in homogenized state was about 150 µm. Samples were deformed through a die characterized by an inner contact angle. During the ECAP process the microstructure…
Die thermische Spritztechnik umfasst Verfahren zum Beschichten von Bauteilen mit verschiedensten Werkstoffen, u.a. zum Schutz gegen Verschleis und Korrosion. Die Verfahren der relativ jungen thermischen Spritztechnik haben in den letzten 20 Jahren in der Oberflachentechnik einen festen Platz eingenommen und werden ihr…
Extended abstract of a paper presented at Microscopy and Microanalysis 2005 in Honolulu, Hawaii, USA, July 31--August 4, 2005
Synthesis and textural characterization along with spectroscopic (IR) confirmation (of supra molecular bond formation) are reported for an achiral Banana Liquid Crystal (BLC) Bent-16, viz., 1,3-phynylene bis(4-hexadecylbenzoate). Bent-16 exhibits a B 2 phase which undergoes a paramorphotic change to B 2 (FE) phase wit…
Typical conductive polymers of poly(3-alkylthiophenes) were synthesized by oxidative polymerization. Alkyl side chains were CnH2n+1 with n=4, 6, 8, 12. The regioregularity with the HT linkage was larger than 99% based on NMR analysis. Completely regioregular head-to-tail (HT) poly(3-alkylthiophenes) were obtained. We…
An increasing trend in the food and pharmaceutical industries is toward replacing synthetic additives with natural products. However, in this regard, difficulties may be encountered due to the instability of such compounds. Encapsulation has become an important process to protect natural pigments. This paper reports o…
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We report results of EPR measurements of activated carbon fibers. Experiments made for pristine activated carbon fibers and activated carbon fibers with adsorbed molecules (CCl 4 , C 6 H 5 NO 2 , and H 2 O) confirmed the localized character of paramagnetic centers observed in the system. Pristine activated carbon fibe…
Diffuse transmittance spectra of polycrystalline samples of chain nickelate Nd2BaNiO5 were measured with high resolution (0.1 cm-1) over wide ranges of wavenumbers (1500–20000 cm-1) and temperatures (4.2–300 K). The energies of 54 Stark sublevels of the Nd3+ ion and exchange splittings of some of them were determined…
A soluble matrix protein P14 with an apparent molecular mass of 14.5 kDa was isolated from fragmented nacre of pearl oysters (Pinctada fucata) treated with 10% NaOH solution to investigate the nacre matrix proteins and their effect on the CaC03crystal. The protein was characterized by gel exclusion chromatography and…
VUV 4f n → 4f n−15d transitions of Gd3+, Er3+, Tm3+, and Lu3+ in fluoride matrices have been analyzed with high-resolution luminescence and excitation spectroscopy. In trifluorides, strong electron-phonon coupling has been found. In the other matrices, the luminescence spectra clearly yield zero-phonon lines and phono…
The mechanism of electroluminescence under inhomogeneous field conditions is investigated, as is the use of electroluminescence for determination of the space charge limited field. The latter investigation indicates that if the volume of polymer within the space charge limited field region is too small, the photon flu…
The observation of spontaneous oscillations in current during the anodization of InP in relatively high concentrations of KOH electrolytes is reported. Oscillations were observed under potential sweep and constant potential conditions. Well-defined oscillations are observed during linear potential sweeps of InP in 5 m…
We have performed extensive numerical computations on the vibrational spectra of isolated amorphous clusters of medium to large size and containing one or two types of atoms. The interaction potential is also varied to study possible universality. For all the potentials and cluster sizes we find that the cumulative de…
Article On the Dendritic Growth and Microsegregation in Ni-Base Superalloys Ιn718, In625 and In939 was published on August 1, 2005 in the journal High Temperature Materials and Processes (volume 24, issue 4).
We have experimentally studied the effect of X-ray irradiation on the structural and dielectric properties of glycine phosphite (GPI) single crystal around its ferroelectric phase transition. While there was no appreciable change in the lattice parameters, a significant drop in the value of dielectric constant and tan…
Abstract In this study, Al‐pillared white bentonite (Ordu‐Unye, Turkey) was used for cottonseed oil bleaching. Pillaring process parameters were optimized in terms of bleaching efficiency as the bleaching capacity of cottonseed oil. The initial cation concentration, hydrolyzing agent ratio, and thermal treatment tempe…
The applicability of bremsstrahlung counting to in-situ measurements of high level tritiated water has been examined. A specially designed metallic vial fitted with a gold-coated beryllium window was prepared for the present examinations. Only tritiated water of a given amount was put into the vial. The volume depende…
Purpose To study the effect of inhibition of new bipyrazole derivatives on the corrosion of steel in HCl media at various temperatures. Design/methodology/approach In this study, novel corrosion inhibitors, namely bipyrazoles were synthesised and tested as corrosion inhibitors for steel in 1 M HCl. The degree of corro…