The isothermal oxidation behavior of Ti-24Al-14Nb-3V-0.5Mo alloy in synthetic air from 700°C to 1000°C was studied. The main emphasis was focused on the effect of microstructure obtained by different processes of melting and hot rolling, i.e. large and duplex of 2+B2, on the oxidation resistance. Regardless of the microstructure, the overall oxidation process of the specimens exposed at 700°C w...

Investigations into the possibility of improving the strength-ductility relation in a metastable β-titanium alloy (Ti-10V-2Fe-3Al) through plasticity induced transformation (PiTTi) have been carried out. Various heat treatments in the β and/or α+β condition were performed to study their influence on both the microstructure and solute partitioning, which eventually control the PiTTi effect. Stre...

This paper describes the microstructure, tensile, and tensile–creep behavior of a series of Mg–Zn alloys ranging from 0 to 4.4 wt.% Zn. The microstructures consisted of equiaxed hexagonal-close-packed grains with fine precipitates preferentially located at grain boundaries. Some of the microstructures contained fine laths within the equiaxed grains. The finest grain sizes were observed for a Zn...

A specific colorimetric DNA detection method based on oligonucleotide functionalized gold-silver-alloy nanoparticles (AuAg-alloy-nanoprobes) is presented. The AuAg-alloy-nanoprobes were then used for the specific detection of a DNA sequence from TP53-a gene involved in cancer development. The AuAg-alloy-nanoprobes were then used in combination with Au-nanoprobes for a one-pot dual-colour detect...

A modular synthesis of tetrasubstituted furan carboxylates using a tandem cycloisomerization/oxidative carbonylation sequence of cyclopropenes has been successfully developed. The Tandem Metal Relay Catalysis (TMRC) pathway accounted for the high efficiency of this transformation.

It is known that the light scattering from the metal particles deposited on the surfaces of cells can be used for increasing light trapping in the solar cells. In this work, plasmonic structures are composite materials that consisted of silver nanoparticles embedded in dielectric films of TiO x -used as cell antireflection coating. The films are deposited by sol-gel method using spin-on techniq...

To include electron-electron correlation effects in the nanosystem we are proposing a combined density-functional-theorydynamical-mean-field-theory (DFT + DMFT) approach, which we have recently shown to be suitable for including correlation effects in small (2-5 atoms) Fe and FePt clusters [1]. This method has several advantages as compared to the widely used DFT + U approach, the most importan...

Zinc-based adsorbents currently in use for H2S removal from tail gas in the oil and gas industry have limited regenerability and reduced performance over multiple cycles [1,2]. Spatially well-distributed metal nanoparticles in mesoporous substrates can be effective in achieving better performance over multiple adsorption and regeneration cycles [3,4]. One of the critical aspects of understandin...

Realistic molecular models of one and two-centre catalytic active sites originating from the cleavage of a precursor material known to give rise to an active double metal cyanide catalyst are described. Via periodic density functional calculations the structure of the proposed catalytic sites are shown to be dependent on electrostatic and structural relaxation processes occurring at the surface...

[*] T. Schmoelzer, Dr. S. Mayer, Prof. Dr. H. Clemens Department of Physical Metallurgy and Materials Testing, Montanuniversität Leoben, 8700 Leoben, (Austria) E-mail: [email protected] Dr. K.-D. Liss Australian Nuclear Science and Technology Organisation, Lucas Heights, NSW 2232, (Australia) Dr. P. Staron Institute of Materials Research, Helmholtz-Zentrum Geesthacht, 21502 Gees...