NiTi shape memory alloys have attracted significant interest due to their unique
superelasticity and high damping performance. In this work, the effect of SiC particle size on both
physical and mechanical properties of NiTi matrix composite was investigated. Ni and Ti powders
with particle sizes of 40 μm were used with the SiC addition with varying particle sizes of 20 μm
and 40 μm, respectively. Composites of NiTi with 1wt. % SiC were fabricated by powder
metallurgy technique. The effects of SiCp addition on hardness, relative density and wear behavior
of NiTi composites have been investigated. The samples were examined by scanning electron
microscope, for microstructural studies and phase development. The results showed that the
distribution of the reinforced particle was uniform. Moreover, as the SiC particle size decreases,
hardness and wear resistance increase. It was demonstrated that SiC particle size significantly
enhanced the wear resistance of NiTi composite.
Keywords: NiTi shape memory alloy, SiC, powder metallurgy, wear.