Metastable Ti1-xAlxN (0.4 ≤ x ≤ 0.76) films are grown using a hybrid approach in which high-power pulsed magnetron sputtering (HIPIMS) is combined with dc magnetron sputtering (DCMS). Elemental Al and Ti metal targets are co-sputtered with one operated in HIPIMS mode and the other target in DCMS; the positions of the targets are then switched for the next set of experiments. In both cases, the ...

In this study, Ti, Al and N doped DLC – referred to here after as “(Ti,Al)CN/DLC composite”- coating and pure diamond-like coating (DLC) were produced by cathodic arc deposition technique and the effects of the coating thickness on their tribological properties were evaluated. The coatings were characterized, using scanning electron microscopy (SEM), atomic force microscopy (AFM), X-ray diffrac...

The potent serine protease, neutrophil elastase (NE), is stored in neutrophil azurophilic granules, where it is available to degrade phagocytosed material and can be released by the cell to assist in tissue migration and help clear tissue debris. While neutrophils carry NE, they cannot produce it; the NE gene is expressed only in bone marrow granulocyte precursor cells. Protection of normal tis...

We present a combined study based on experimental measurements of infrared (IR) dielectric function and first-principles calculations IR spectra vibrational density states (VDOS) amorphous alumina (am-Al$_2$O$_3$). In particular, we show that the main features imaginary part $\epsilon_2(\omega)$ at $\sim$380 630 cm$^{-1}$ are related to motions threefold coordinated oxygen atoms, which vast maj...

The transformation of Al3Zr (L12) and Al3(Zr1 xTix) (L12) precipitates to their respective equilibrium D023 structures is investigated in conventionally solidified Al–0.1Zr and Al–0.1Zr–0.1Ti (at.%) alloys aged isothermally at 500 C or aged isochronally in the range 300– 600 C. Titanium additions delay neither coarsening of the metastable L12 precipitates nor their transformation to the D023 st...

a Institute of Materials Science and Technology, TU Wien, A-1060 Vienna, Austria b Christian Doppler Laboratory for Application Oriented Coating Development, TU Wien, A-1060 Vienna, Austria c Department of Physical Metallurgy and Materials Testing, Montanuniversität Leoben, A-8700 Leoben, Austria d Helmholtz-Zentrum Berlin für Materialien und Energien, 12489 Berlin, Germany e Department of Mate...

Coatings are vital to protect and to increase the productivity of cutting tools in high speed and dry cutting applications. During the cutting operation the temperature may exceed 1000 oC it is therefore necessary that the coatings withstand high temperatures. A lot of development and research has been carried out during the last 30 years on finding new coating material systems providing enhanc...

plasmid DNA. Those fragments represent the homologous Ti-plasmid DNA segment 8,um long (1 5 % of the Ti-plasmid). An argument that this region of the plasmid contains genes essential for the expression of oncogenicity came from the analysis of a deletion mutant in the Ti-plasmid (Hernalsteens et al., 1975). Since this deletion mutant is unable to confer oncogenicity and has lost exactly those t...