MECHANICAL PROPERT IES OF MULTI-COMPONENT POLYMERIC COMPOSITE WITH PART ICLES OF AL2O3/SIC

Composite materials, due to their specific properties, are widely applicable in many industrial branches. They consist of minimally two components influencing their resulting properties. Properties required for a given application can be reached by a combination of the individual components. During the presented experiment, microparticles of Al2O3 and SiC were added into the composite material in order to improve mechanical properties (wear resistance, hardness, and tensile properties) of a suggested composite system. Composite materials were prepared using various ratios of individual components of Al2O3 and SiC and various particle sizes with the aim to set an optimum proportion of the components in dependence upon the required mechanical quality. Such composite systems can be utilized e.g. for a renovation of agricultural machines and machine parts. To verify the procedure in practice, a chosen composite system was applied on the knives of a rotary cultivator and their service life was compared with that of standard knives.