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Projects / Programmes source: ARIS

Prašna metalurgija in intermetalni magneti (Slovene)

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Periods
January 1, 1999 - December 31, 2003
Research activity

Code Science Field Subfield
2.04.00  Engineering sciences and technologies  Materials science and technology   
1.08.00  Natural sciences and mathematics  Control and care of the environment   

Code Science Field
T450  Technological sciences  Metal technology, metallurgy, metal products 
P260  Natural sciences and mathematics  Condensed matter: electronic structure, electrical, magnetic and optical properties, supraconductors, magnetic resonance, relaxation, spectroscopy 
P250  Natural sciences and mathematics  Condensed matter: structure, thermal and mechanical properties, crystallography, phase equilibria 
B260  Biomedical sciences  Hydrobiology, marine biology, aquatic ecology, limnology 
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 (6)
no. Code Name and surname Research area Role Period No. of publications
1.  02556  PhD Goran Dražić  Materials science and technology  Researcher  2001 - 2003  1,029 
2.  04355  PhD Spomenka Kobe  Materials science and technology  Head  2001 - 2003  764 
3.  18594  PhD Paul John Mc Guiness  Materials science and technology  Researcher  2001 - 2003  338 
4.  06425  Anton Porenta  Chemical engineering  Researcher  2001 - 2003  10 
5.  10570  PhD Boris Saje  Materials science and technology  Researcher  2001 - 2003  87 
6.  18824  PhD Kristina Žužek  Materials science and technology  Researcher  2001 - 2003  362 
Organisations (1)
no. Code Research organisation City Registration number No. of publications
1.  0106  Jožef Stefan Institute  Ljubljana  5051606000  90,753 
Abstract
Research program in the field of modern powder metallurgy and intermetallic magnets is based on the research experience and expertise of the members of the group on the broader area of powder metallurgy, intermetallic magnets, hydrogenation and nitration at elevated temperatures and microstructural characterisation of various materials. Beside research work in the field of permanent metallic magnets, carried out for many years, the group started with investigations of magnetic materials based on the exchange interaction between valence electrons. As a processing method mechanical alloying of intermetallic alloys of rare earth and transition elements are used. Members of the group will continue to contribute to the basic knowledge in the fields of magnetic materials and powder metallurgy. Emphasis is on the study of materials based on intermetallic alloys RE-TM among which RETM5, RE2TM17, RE2TM14B are the most promising materials. Interstitially modified RE2-TM17N3-d has also exceptional magnetic properties. These materials are used in areas with high degree of miniaturisation, such as computers, telecommunications and medicine. New ecologically less problematic methods for the synthesis of nanopowders used for bonded magnets will be studied. Investigations of the influence of chemical composition and process parameters on the sintering, phase composition and the microstructure will be continued with the aim to improve coercitivity and energy product of the magnets. Using analytical electron microscopy microstructural features, such as grain boundaries, precipitates and crystal defects will be investigated. Analytical electron microscopy is practically the only adequate method for the study of nanocrystalline magnet powders. The preparation of TEM samples of magnetic powders consisting of nanometer sized crystals is extremely difficult problem. HDDR process was found to be the most efficient for the preparation of nanocrystalline powders based on RE-TM. The possibility of applying the HDDR method on other materials that have the capability of hydrogen absorption will also be investigated. Experimental results will be compared to the magnetic properties calculated ab initio within the framework of the density functional theory. The use of the modern magnet materials for environmental applications will also be studied.
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