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.

NiTi shape memory alloys have attracted significant attention due to their unique shape memory effect, superelasticity, and excellent mechanical performance. In addition, the fact that NiTi alloys have high resistance to cavitation and corrosion makes them ideal candidate materials in advanced tribological and biomedical applications. The NiTi alloy composite reinforced by fine grain-sized SiC particles was successfully fabricated using powder metallurgy process. In this process, elemental Ni-Ti metal powder mixes reinforced with 0, 1, and 5 % SiC particulates were pressed uniaxial and sintered at 1100 • C in an argon atmosphere for 3 h. The effect of the SiC additions on the mechanical properties, porosity degree, and phase formation of the porous NiTi alloys was studied. After characterization, the bioactivity of the SiC/NiTi exposed samples was evaluated in simulated body fluid test. The microstructure characterization and phase identification of the apatite layer formed in SBF on their surface were also evaluated.

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