Investigator: RNDr. Antonín Dlouhý, CSc.
Number of Project: 202/09/2073
Agency: Czech Science Foundation
Duration: 01. 01. 2009 - 31. 12. 2011

We would like to take advantage of highly regular and stable microstructure of advanced in-situ composites and use them as model systems to investigate basic (high temperature) deformation mechanisms in two phase solids. Attention will be given mainly to (i) a size effect the (sub)micron sized reinforcement may have on the overall strength of the composite, (ii) the dislocation level understanding of stress redistribution (transfer) from the ductile matrix towards stiffer fibres, (iii) the role of interface phenomena (sliding, dislocation transfer and diffusion controlled recovery) on the composite strength and (iv) the mechanisms of fibre fragmentation due to high temperature exposures. Were the project granted, we may expect the following results: (i) new experimental data on the strength of in-situ composites tested in the CP, CN and TP mode, (ii) new experimental data relating the size and distribution of reinforcement and the high temperature composite strength and (iii) new TEM evidence on the (dislocation) mechanisms of stress redistribution between composite constituents.