Küçük ölçekli insansız hava aracı motor pistonlarının alüminyum matrisli kompozit ile üretimi ve karakterizasyonu

Conventional pistons are produced from the Al-Si alloy which has high-temperature resistance with the addition of 1 wt.% each of Cu, Mg, and Ni. These elements are added to increase the strength of the alloy. High Si content provides a lower expansion coefficient and higher wear resistance; however, it decreases the strength of the piston. The heat treatment of piston alloy is generally T5 and T6. This modification can be modal or compositional. That is to say, to increase the piston life, either the design of the piston should be changed, or the material of piston should be improved. Therefore, in this study, the material of the piston head was replaced with the metal matrix composite material. The characterizations of the new pistons and conventional ones were done. The results were collected and compared to their performances, physical, and chemical properties. Then, the results show that the composite pistons, especially produced by the Rheo-sintering technique, have superior mechanical properties such as higher wear resistance, higher fatigue life, and higher flexural strength.