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Projects / Programmes source: ARIS

Tehnologije metastabilnih materialov s kovinsko osnovo (Slovene)

Periods
Research activity

Code Science Field Subfield
2.10.00  Engineering sciences and technologies  Manufacturing technologies and systems   
2.04.00  Engineering sciences and technologies  Materials science and technology   

Code Science Field
2.05  Engineering and Technology  Materials engineering 
Evaluation (rules)
source: COBISS
Researchers (16)
no. Code Name and surname Research area Role Period No. of publicationsNo. of publications
1.  10369  PhD Ivan Anžel  Materials science and technology  Head  2009 - 2012  712 
2.  20229  PhD Mihael Brunčko  Materials science and technology  Researcher  2009 - 2012  250 
3.  33259  PhD Janko Ferčec  Materials science and technology  Junior researcher  2010 - 2012  45 
4.  05168  PhD Vladimir Gliha  Manufacturing technologies and systems  Researcher  2009 - 2012  338 
5.  16185  PhD Leo Gusel  Manufacturing technologies and systems  Researcher  2009 - 2012  153 
6.  01375  PhD Janez Kramberger  Mechanical design  Researcher  2009 - 2012  534 
7.  11951  PhD Gorazd Lojen  Materials science and technology  Researcher  2009 - 2012  253 
8.  35509  PhD Peter Majerič  Manufacturing technologies and systems  Junior researcher  2012  189 
9.  34919  Ida Rajić Kranjac    Technical associate  2012 
10.  28409  PhD Niko Rozman  Materials science and technology  Junior researcher  2009 - 2010  36 
11.  14335  PhD Rebeka Rudolf  Manufacturing technologies and systems  Researcher  2009 - 2012  1,085 
12.  09376  Viljem Šprah    Technical associate  2009 - 2012  46 
13.  17123  Rok Šulek    Technical associate  2009 - 2012  71 
14.  15682  PhD Tomaž Vuherer  Manufacturing technologies and systems  Researcher  2011 - 2012  512 
15.  24826  PhD Tjaša Zupančič Hartner  Materials science and technology  Junior researcher in economics  2009 - 2012  85 
16.  12295  PhD Franc Zupanič  Materials science and technology  Researcher  2009 - 2012  483 
Organisations (1)
no. Code Research organisation City Registration number No. of publicationsNo. of publications
1.  0795  University ob Maribor, Faculty of mechanical engineering  Maribor  5089638010  23,701 
Significance for science
Researches in the fields of manufacturing, characterization and properties of metastable materials are important for engineering, as well as for the natural sciences (e.g. materials science, physics, chemistry...). In the results of research program gave our program group the answers to some open scientific questions and explained the mechanisms of certain processes and phenomena in metastable metallic materials. With these results a significant step further in development new metastable materials and technologies for their production has been attained. Among the open questions for which our program group tried to find the answers in the frame of the research program work belongs also the mechanism for plastic deformation in nano-structured composite materials. It is well-known that the dislocation theory (valid for crystal-structured metals and alloys) can not be applied to the metastable nano-structured materials. Consequently, the research of these mechanisms can be considered as a top-ranking topic of crucial importance for further development in this field. The experiments performed on the samples of which the core consisted of Cu based solid solution and the coat presented the metal-ceramic composite Cu-Al2O3, revealed two mechanisms of plastic deformation in the composite coat, while the plastic flow in core proceeds by dislocation sliding. In the composite coat plastic deformation proceeds by dislocation sliding as long as deformation strengthening in the volume of grains triggers energetically more favorable mechanism of grain boundary sliding. For the progress in science were also important the investigations and the new cognitions about the influence of lattice-defects in the microstructures of metastable materials on chemical reactions and phase transformations in solid state. Researches confirmed the hypothesis that chemical reactions, which can not be expected in thermodynamically stable microstructures, occur in metastable microstructures with increased concentrations of lattice-defects. So, for the instance, formation of fine nano-sized oxide-particles throughout the crystal grains has been found out during annealing of rapidly solidified micro alloyed gold. This phenomenon can be regarded as a peculiar paradox as thermodynamical conditions for this chemical reaction are not fulfilled. The potential of dispersion strengthened gold alloy produced in this way from the metastable state of the microstructure, has been confirmed in thin surface layers on medical implants. Significant step further in the field of development of new technologies for production the nanostructural metastable states present the experiments of producing the gold nano-particles with technology of ultrasonic spray pyrolysis. The researches have shown that with this technology it is possible to control the size, morphology and topology of nanoparticles, the important characteristics which influence their functional properties. The research work in the field of aluminium alloys with quasicrystalline phases gave important results for development of the science in this field. The influence of addition of the third and fourth alloying elements on the stability of quasicrystals and kinetics of their decomposition has been analyzed. The phase composition of the Al-Mn-Be-Cu alloy, as a function of solidification conditions has been also defined, and the impact of added alloying elements on the stability of quasicrystalline phases was explained. The strength properties of these alloys reach the values of high-strength aluminium alloys and they show slightly higher elongation, which present a good potential for their implementation in the ndustrial production.
Significance for the country
Numerous research projects are running all over the world dealing with the development of technology and materials that are in a metastable state. Moreover, there are a lot of applied projects and the founding of spin-offs and other companies that are concerned with the production of suchlike materials. The added-value of this high tech production is very high. Momentarily, there are in Slovenia, a lot of very successful companies concerned with production, processing and founding of aluminium, copper and noble metals. These companies master the technology of valued alloys; however, they attain poor added-value on the market. To stay competitive in the future they must also be qualified for the production of technologically-advanced materials and products. In these companies those long-term research activities that are important for growth are often disregarded, due to limited financial funds and a few engineers who are occupied with current and short-term problems. From this point of view, we believe that with deeper theoretical knowledge of materials and technologies and also with development and mastering of modern materials technology, we obtained high level of knowledge for quality support to Slovenian industry which is already confronted with demand for initiation of new technologies and materials. As a program group at the Faculty of Mechanical Engineering, University of Maribor we carry acquired knowledge on pedagogical process and for our students who will in a few years employ themselves and will represent the carriers of progress to our companies. Already previous work on a research program has enabled us, due to curiosity and the usefulness of the topic, establishment of contacts, and collaboration with numerous local and foreign companies, as well as research groups. Moreover, these connections would be widened and consolidated with the continuation of our research program.
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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