FP6 priority
1.1.3   Nanotechnologies and Nanosciences, Knowledge-based Multifunctional Materials and New Production Processes and Devices
Title of the proposal

Development and Characterization of Advanced Ceramic Nanocomposites

Slovak Academy of Sciences, Institute of Materials Reserarch
Watsonova 47, 043 53 Kosice Slovak Republic
Assoc.Prof. Dr. Jan DUSZA, DrSc.,
+421 55 6338115

Research subject for a potential FP6 project

Microstructure analysis of nanocomposites prepared by different processing route, having a “designed microstructure”, with nanoparticles located predominantly intergranularly or intragranu-larly according to the physical properties of the matrix and nanoparticles. Statistical evaluation of the grain size of matrix grains and nanoparticles and the location of nanoparticles. Characterization of the chemical composition and geometry of intergranular phase.
Analysis of residual stresses.
Testing of mechanical properties as bending strength, fracture toughness, static/cyclic fatigue, creep, etc. and the oxidation behaviour of the materials.
Fractographic failure analysis.Optimalization of the technological process based on the results of the microstructure analysis and the measured fracture - mechanical properties.

Recent international cooperation of the research team

QMW College, London, UK; ISFK Leoben, Austria; University Wien, Austria; ELTE Budapest, Hungary; UPC Barcelona, Spain; K.U.Leuven, Belgie; DLR-IMR Koeln, Germany;

Proposer´s relevant publications related to the research subject

J.Dusza, P.Sajgalik, M.Steen, Fracture toughness of a silicon nitride/silicon carbide nanocomposite at 1350 °C, Journal of the American Ceramic Society, 82, 1999, 12, 3613-3615

J.Dusza, P.Sajgalik, M.Steen, E.Semerad, Dynamic fatigue of a Si3N4+SiC nanocomposite at 1350 °C, Mater. Sci. Eng, A291, 2000, 250-255.
J.Dusza, P.Sajgalik, M.Steen, E.Semerad, Low-cycle fatigue strength of a Si3N4+SiC nanocomposite at 1350 °C, J.Mater. Sci. 2001, 4469-4477.

P.Sajgalik. – M.Hnatko, F.Lofaj. – P.Hvizdos. - J.Dusza, J – P.Warbichler. – F.Hofer. – R.Riedel – E.Lecomte – M.Hoffmann.: SiC/Si3N4 nano/micro-composite - processing, RT and HT mechanical Properties. In: Journal of the European Ceramic Society, 20, 2000, 453-462.
J.Dusza, M.Steen, Fractography and fracture mechanics property assessment of advanced structural ceramics, International Materials Reviews, 165-216, 1999, 44, 165-216.

J.Dusza. – P.Sajgalik.: Fracture Characteristics of Layered and Nano-Particle Reinforced Si3N4. In:Advanced Multilayered and Fibre-Reinforced Composites. NATO ASI Series. Kiev, 2.- 6.6.1997. Dordrecht, Kluwer Acad.Publ. 1998, s. 187-205.
J.Dusza. – P.Sajgalik. – M.Steen – E.Senerad: Fracture characteristics of a Si3N4+SiC nanocomposite at 1350 C, In: Fractography of Glasses and Ceramics IV, American Ceramics Society, 2001, 417-429