Functionally graded materials (FGM) are the new group of advanced materials which exhibit gradual transitions in the microstructure. In such material, the volume fraction of the phase reinforcement varies continuously in a given direction. One of the most effective methods for processing FGMs made of aluminum matrix composites (AMCs) is centrifugal casting process. In such method centrifugal forces cause heavier ceramic particles in the liquid metal to be displaced towards the outer surface of the casting.
Casting of composite suspension for the rotating moulds is the subject of research the authors conducted for many years. In the paper the structure of aluminium functionally graded composites reinforced with SiC ceramic particles and spherical glassy carbon particles obtained by centrifugal casting. This casting method of hybrid suspensions composite is ideal for creating the functional gradient composite layers. This is achieved by using reinforcement with different properties, shape, size, morphology and volume fraction of particles. The article will be presented to the assumptions of applications, technological aspects, macrostructure and microstructure of the Al/SiCp+Cp hybrid composites.
ACKNOWLEDGEMENTS
Scientific work financed from funds allocated for National Science Center, Project No. 6305/B/T02/2011/40