Effect of SiC Particle Size on the Physical and Mechanical Properties of NiTi Alloys


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Akkan H., Şimşir M. , Öksüz K. E.

10th International Conference on Materials Science Engineering (Bramat 2017), Brasov, Romanya, 8 - 11 Mart 2017, cilt.907, ss.3-7 identifier

Özet

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.