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Projects / Programmes source: ARIS

Razvoj nove generacije trdih prevlek s pulznim naprševanjem (Slovene)

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Research activity

Code Science Field Subfield
2.04.01  Engineering sciences and technologies  Materials science and technology  Inorganic nonmetallic materials 

Code Science Field
2.05  Engineering and Technology  Materials engineering 
Evaluation (rules)
source: COBISS
Evaluation of bibliographic research performance indicators according to ARIS methodology
Citations Citations for bibliographic records in COBIB.SI that are linked to records in citation databases
source: WoS source: Scopus source: COBISS
Researchers (12)
no. Code Name and surname Research area Role Period No. of publications
1.  10369  PhD Ivan Anžel  Materials science and technology  Researcher  2009 - 2012  715 
2.  14334  PhD Tonica Bončina  Materials science and technology  Researcher  2009 - 2012  400 
3.  18271  PhD Miha Čekada  Materials science and technology  Researcher  2009 - 2012  439 
4.  15601  Jožko Fišer    Technical associate  2009 - 2012  12 
5.  12616  PhD Darinka Kek Merl  Materials science and technology  Researcher  2009 - 2012  129 
6.  06883  PhD Janez Kopač  Manufacturing technologies and systems  Researcher  2009  1,837 
7.  15602  Damjan Matelič    Technical associate  2009 - 2012  1 
8.  26463  PhD Matjaž Panjan  Electronic components and technologies  Researcher  2009 - 2012  221 
9.  09090  PhD Peter Panjan  Materials science and technology  Head  2009 - 2012  792 
10.  29536  PhD Srečko Paskvale  Materials science and technology  Junior researcher  2009 - 2012  47 
11.  09001  PhD Mirko Soković  Manufacturing technologies and systems  Researcher  2009 - 2012  1,076 
12.  12295  PhD Franc Zupanič  Materials science and technology  Researcher  2009 - 2012  483 
Organisations (3)
no. Code Research organisation City Registration number No. of publications
1.  0106  Jožef Stefan Institute  Ljubljana  5051606000  90,664 
2.  0782  University of Ljubljana, Faculty of Mechanical Engineering  Ljubljana  1627031  29,205 
3.  0795  University ob Maribor, Faculty of mechanical engineering  Maribor  5089638010  23,905 
Significance for science
One important step in plasma surface engineering is the development of nanostructerd coatings. The nanostructured materials are predominantly marked by the interfaces. Interfaces between individual layer in nanolayer structure or nanocrystallites (3-10 nm) of ceramic phases incorporated into an amophous matrix delimit the dislocation mobility and limit the crack propagation. The high ratio of grain boundaries causes a macroductility. This results in coatings with a high toughness. High power pulsed magnetron sputtering (HPPMS) is a new not still very established technique for preparation of advanced hard coatings. Its main feature is pulsed power supply, which generates pulses with a peak power of around one megawatt, but with duration of only a few tens of microseconds. At such a high power density, the target material is almost completely ionized, which enables the formation of coating with a nanocrystalline microstructure and superb adhesion. Pulsed magnetron sputtering at low power is a useful method for preparation of hard coatings on temperature sensitive materials like Al- and Cu-alloys and steel substrates tempered at temperature bellow 200 °C. The deep knowledge of physical processes which are responsible for heating of substrates in a low pressure plasma is necessary. We also have to know how the energy of sputtered species influences the microstructure and adhesion of hard coatings and how can we control this energy. Benefit directly resulting from this research is a generation of new knowledge and development of innovative technologies related to advanced PVD hard coatings. Recent advances in science and engineering stimulate the development of new hard coating materials and surface engineering processes that provide an ever increasing performance of cutting and other types of tools. This includes enhanced tribological properties (high hardness, abrasion and erosion resistance, low sliding wear and low coefficients of friction), excellent corrosion protection, high temperature stability, controlled thermal conductivity and others. Many of these requirements are defined by the need in machining industry where hard coatings are applied on cutting tools to increase their service life (productivity), machining speed and decrease costs. The field of coating and surface engineering technologies is evolving very rapidly thanks to the synergy between the progress in materials science, development of new fabrication processes. The results of the this project (10 scientific papers, 2 PhD theses, 1 patent, introduction of 4 new coatings in industrial use) contribute to the research of the nanostructured coatings, as well to the applications of the coatings for the protection of the tools and the components. There are numerous problems related to the deposition process (the influence of substrate rotation mode on uniformity of multi- and nanolayer coatings, the influence of growth defects on tribological properties of coatings) as well as the formation and the properties of the nanostructured coating that were solved in the framework of this project.
Significance for the country
High quality tools are necessary for machining of very different kind of materials. Only with high quality tools a reliabe industrial production of high quality products at high productivity are possible. Machining of new difficult to machine materials, new products, higher productivity and larger tool life demand a dvelopment of new tool materials as well as new techniques for tool wera protection. Thus the use of hard coatings for wear protection of tool is inevitable today. One of the key technologies for enhancement of tool surface properties is the plasma surface engineering. Using this technique, 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 engineering is thus the foundation of modern tool industry. Plasma surface engineering may be defined as the design of both surface and substrate in a functional system with a cost-effective performance enhancement of which neither is capable on its own. In order to obtain the selected properties of the tool it is not necessary to change the properties of the bulk material. It is enough to adapt the surface properties with appropriate plasma surface engeineering technique. One of them is deposition of PVD-hard coating with suitable properties. The Department for thin films and surface at Jožef Stefan Institute has performed research on deposition and characterization of hard protective coatings for over 30 years. We already intensively collaborate with Slovenian industry. Among applied research three generation of PVD hard coatings have been developed for the protection of tools for various production processes in industry. More than150 industrial partners (especially automotive industry, electronics sector, and pharmaceutical industry) in Slovenia and abroad are using our PVD hard coatings for wear and corrosion protection of different tools. Such protective coatings improve the tool lifetime and productivity in selected machining process. Although the general purpose of hard protective coatings appears economy-driven (i.e. improvement of tool lifetime), it has severalother socio-economic benefits. In first place it reduces the need for raw materials, especially for strategic materials, such as cobalt or tungsten. Ecological benefits include a decreaseof energy consumption (protective coatings reduce the friction coefficient and thus the cutting or forming forces), a decrease in use of lubricants and cooling liquids (which can bein certain applications omitted entirely), and replacement of ecologically problematic galvanic technologies (e.g. hard chromium) with clean ones. A contribution to public health isrelated to the reduction of aerosol lubricants, to which the workers in steel industry are constantly exposed today (especially in the case of high-speed machining). Hard protective coatings and tooling industry in general are high added value production. At present they are one of the most competitive parts of Slovenian industry on the world market, while tool industry is the one economic activity, where Slovenia has been among the most competitive in Europe. The knowledge obtained in the framework of this project enableed us to develope a new PVD high power pulsed magnetron sputtering (HPPMS) deposition technique and thus a preparation of a new generation of hard protective coatings. Part of them we already introduced into industrial use.
Most important scientific results Annual report 2009, 2010, 2011, final report, complete report on dLib.si
Most important socioeconomically and culturally relevant results Annual report 2009, 2010, 2011, final report, complete report on dLib.si
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