Nano Structured Materials



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Research Area

Activities in field of nanocrystalline metal matrix materials are oriented on their synthesis via mechano-chemical methods (patent No. 282462 and patent No. 285928, both based on preparation of nanocrystalline powder systems with copper matrix) and fundamental understanding of the relationships between the processing, microstructure and mechanical properties of the bulk nanocrystalline materials designed for high temperature applications.
Basic research in the area of microstructure simulation and analysis of physical and mechanical properties of metal based composites. Generation of complex microstructural model verified on real materials. Evaluation of creep in metal based composites in dependence on the external factors and on microstructure parameters. Analysis of the role of interphase boundaries and design of strain and fracture models valid for metal based composites at elevated temperatures.
The research of nanocrystalline materials is oriented on the development of nanomaterials by SPD (severe plastic deformation) methods, physical and mechanical properties of selected metal materials as well as on analysis of nanosized structure parameters with the aim to determine mechanisms of the process.


Recent Projects

          National:

  • VEGA SR 2/0167/10: Structure stability of nanocrystalline metal materials prepared by progressive powder technologies, 2010-2012

  • VEGA SR 2/0105/08: Microstructure and nanostructure metallic materials prepared by SPD methods, 2008-2010

  • VEGA SR 2/0025/11: Effect of dispersion particles on structure formation and properties of nanocomposites prepared by SPD method, 2011-2013


    International:

  • 7 th FP EU: PITN-GA-2008-211536: Macro, Micro and Nano Aspects of Machining (MAMINA), IMR SAS partner of the project, 2008-2012

Research Methods

The microstructure of the powder mixtures and macroscopic samples is analysed by light microscopy, scanning electron microscopy (SEM) with EDX and EBSD analysis, transmission electron microscopy (TEM) and electron diffraction of selected area (SAD) and X-ray diffraction (XRD) at room temperature and elevated temperatures. The tensile tests of the standard specimens of bulk dispersion strengthened nanocrystalline materials are performed at room and elevated temperatures.
By ECAP (Equal channel angular pressing) method and application of intensive plastic deformations (IPD) nanostructure of composite materials is formed.
A method of "small punch" is used to obtain creep characteristics of alloys and composite materials based on Al, extruded and ECAPed (micro and nano materials).

 

Selected Publications

  • ĎURIŠIN, J. - OROLÍNOVÁ, M.  - ĎURIŠINOVÁ, K.: Powder Metallurgy of Aluminium. Aluminium Materials and Technologies from A to Z. Ed. Š.Michna a kol.. Děčín : Alcan, s.r.o., 2007, p.520-542
  • NAGLER, B. - SAKSL, K.: Turning Solid Aluminium Transparent by Intense Soft X-Ray Photoionization. Nature Physics, 5, 2009, p.693-696
  • ĎURIŠIN, J. - ĎURIŠINOVÁ, K. - OROLÍNOVÁ, M. - SAKSL, K.: Preparation and Microstructure Evolution of Nanocomposite Powder Copper. International Journal of Materials and Product Technology, 23, 2005, 1/2a, p.42-68
  • ĎURIŠIN, J. - ĎURIŠINOVÁ, K. - OROLÍNOVÁ, M. - BESTERCI, M.: Microstructure Stability of Al – Al4C3 Materials at Elevated Temperatures. High Temperature Materials and Processes, 25, 2006, 3, p.149-155
  • SAKSL, K. - ĎURIŠIN, J. - OROLÍNOVÁ, M. - ĎURIŠINOVÁ, K. - LAZÁR, P.: Structural Study on Al-26 Mass% Si-8 Mass% Ni Powder. Journal of Materials Science, 40, 2005, p.1975-1978
  • ĎURIŠIN, J.  - OROLÍNOVÁ, M.  - ĎURIŠINOVÁ, K.  - BESTERCI, M.: Texture of Extruded Al-Al4C3 Material. Kovové materiály, 45, 2007, p.269-274
  • OROLÍNOVÁ, M. - ĎURIŠIN, J. - ĎURIŠINOVÁ, K. - BESTERCI, M.  - SAKSL, K.: Structural Analyses on AlSi26Ni8 Rapidly Solidified Alloys. High Temperature Materials and Processes, 27, 2008, p.61-72
  • COUET, S. - SCHLAGE, K. - SAKSL, K. - RÖHLSBERGER, R.: Morphology of the Interfaces between Transition Metals and Their Native Oxides: Role of Interdiffusion Processes. Physical Review B, 79, 2009, 085417
  • JÓVÁRI, P. - SAKSL, K. - PRYDS, N. - LEBECH, B. - BAILEY, N. - MELLERGARD, A. - DELAPLANE, R. - FRANZ, H.: Atomic Structure of Glassy Mg60Cu30Y10 Investigated with EXAFS, X-Ray and Neutron Diffraction, and Reverse Monte Carlo Simulations. Physical Review B, 76, 2007, 054208
  • SAKSL, K. - VOJTĚCH, D. - ĎURIŠIN, J.: In-Situ XRD Studies on Al-Ni and Al-Ni-Sr Alloys Prepared by Rapid Solidification. Journal of Alloys and Compounds, 464, 2008, p.95-100
  • BESTERCI, M. - KVAČKAJ, T. - KOVÁČ, L. - SÜLLEIOVÁ, K.: Nanostructures and Mechanical Properties Developed in Cu by Severe Plastic Deformations. Kovové mateiály, 44, 2006, p.101-106
  • BESTERCI, M. - VELGOSOVÁ, O.: The Influence of Factors on Superplastic Deformation of Al-Al4C3 Composites. Materials and Design, 27, 2006, p.789-793
  • BALLÓKOVÁ, B. - HVIZDOŠ, P. - BESTERCI, M. - ZUMDICK, M. - BÖHM, A.: Creep Testing of MoSi2 - Bases Composites. High Temperature Materials and Processes, 25, 2006, 3, p.139-142
  • BESTERCI, M. - VELGOSOVÁ, O.: The Influence of External Factors on Enhanced Plasticity of Al-Al4C3 Materials. Science and Engineering of Composite Materials, 13, 2006, 4, p.283-290
  • BESTERCI, M. -  ĎURIŠIN, J. - SÜLLEIOVÁ, K. - OROLÍNOVÁ, M. - ĎURIŠINOVÁ, K.:  Microstructure Analysis of Carbonization Kinetics of Al-C System. High Temperature Materials and Processes, 26, 2007, 2, p.161-165
  • BESTERCI, M. - HVIZDOŠ, P. - SÜLLEIOVÁ, K. - EDTMEIER, CH.: Processing, Microstructure and Creep Testing of Pt-Y2O3 Composite. Materials and Design, 28, 2007, p.2540-2543
  • BESTERCI, M. - KOHÚTEK, I. - VELGOSOVÁ, O.: Microstructural Parameters of Dispersion Strengthened Cu-Al2O3 Materials. Journal of Materials Science, 43, 2008, p.900-905
  • BESTERCI, M. - SÜLLEIOVÁ, K. - KVAČKAJ, T.: Fracture Micromechanisms of Cu Nanomaterials Prepared by ECAP. Kovové mataeriály, 46, 2008, p.309-311
  • BESTERCI, M. - VELGOSOVÁ, O. - IVAN, J. - HVIZDOŠ, P. - KVAČKAJ, T. -  KULU, P.: Fracture Mechanism of Al-Al4C3 Nanomaterials Studies by "in Situ Tensile Test in SEM". Kovové materiály, 47, 2009, p.221-225
  • BALLÓKOVÁ, B. - BESTERCI, M. - ŠAROUN, J. - HVIZDOŠ, P. : Microstructure Evaluation of MoSi2 Based Composite Materials by SANS Investigations. Kovové materiály, 47, 2009, p.375-380
  • BESTERCI, M. - VELGOSOVÁ, O. - IVAN, J. - KVAČKAJ, T.: The Mechanism of the Failure of the Dispersion-Strengthened Cu-Al2O3 Nanosystem. Journal of Materials Science, 45, 2010, p.4073-4077
  • DOBEŠ, F. - MILIČKA, K. - BESTERCI, M. - KVAČKAJ, T.: The Influence of ECAP on the Small Punch Creep of Al-4 vol%Al4C3 Composite. Journal of Materials Science, 45, 2010, p.5171-5176
  • BALLÓKOVÁ, B. - BESTERCI, M. - HVIZDOŠ, P.: High Temperature Properties of MoSi_2 and MoSi_2-SiC Nanocomposites. High Temperature Materials and Processes , 28, 2009, p.271-276
     









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