For protection of metal compaction tools we used the a-CN/TiAlN coating which proved successful results. Such hybrid coating combines the advantages of a very hard, thermally stable TiAlN with the sliding and lubricating properties of top carbon based coating. Depositions of both layers were performed by sputter deposition in CC800/9 sinOx ML system.
COBISS.SI-ID: 24027175
The removal rate of carbon from amorphous graphite–tungsten composite during cleaning in oxygen plasma was studied. The composite was prepared by sputter deposition from C and WC-targets in Ar atmosphere. The samples were treated in a weakly ionized highly dissociated oxygen plasma created in a microwave discharge. The temperature of the samples during treatment was about 580 °C. After plasma treatment the samples were analyzed by AES depth profiling, XPS, SEM and AFM. It was found that during the plasma treatment preferential etching of the carbon occurred.
COBISS.SI-ID: 23158567
Picosecond (40 ps) pulsed Nd:YAG laser irradiation of a WTi thin film on silicon with a wavelength of 532 nm and a fluence 2.1 J/cm2 was performed in air. This led to significant changes of the chemical composition and morphology on the surface of the WTi thin film. The results show an increase in surface roughness, due to formation of conical structures, about 50 nm wide in the base, and a very thin oxide layer composed of WO3 and TiO2. The thickness of the oxide layer was dependent on the number of laser pulses.
COBISS.SI-ID: 23406375
One of the key technologies for enhancement of tool surface properties is the plasma surface engineering. A thin film with a thickness of only a few micrometers consisting of a very hard ceramic material is deposited on the tool surface. Using tools protected by advanced nanostructured hard coatings, hard tool steels can be machined as well as various composites, nickel and titanium alloys, which are very difficult to machine. Plasma techniques are also applied for protection of hard lubricant coatings on components of the internal combustion engines, on hard discs and in medicine.
COBISS.SI-ID: 23706919
We confront two paradigms of R&D internationalization (traditional and new one) and we determine what are the main motives that drive R&D internationalization of TNCs. Based on a modern innovation theory, we derive a cluster approach as a specific method of analyzing modern R&D internationalization. We then present an analysis of two high-tech clusters (Cambridge, Bangalore) and we show that some TNCs allocate their foreign R&D units into those clusters, in order to make use of available external knowledge from academic institutions through intensive R&D collaborations.
COBISS.SI-ID: 3739607