Akademik Veri Yönetim Sistemi
6TH INTERNATIONAL CONFERENCE ON LIFE AND ENGINEERING SCIENCES, Antalya, Türkiye, 2 - 05 Kasım 2023, ss.51-52, (Özet Bildiri)
Materials that can be used in high temperature gas reactors and turbine blades must have high mechanical strength and good corrosion resistance at temperatures above 1000 ºC. It is known that Ni-based superalloys are generally used for this purpose. There are a very limited number of studies on Ni3Al structures, which are among the Ni-based superalloys that have come to the fore recently. In this study, the effects of Cr, Mo, Nb, and W heavy metal doping on the crystallographic and morphological properties of Ni3Al alloy were investigated. Powder metallurgy step sintering method was used to produce the alloys. Six different alloys with the compositions of Ni3Al, Al9.5Cr16Nb1Mo1W1Ni28.5, Al9Cr15.5Nb1Mo1W1Ni27, Al9.5Cr15Nb1Mo1W1Ni28.5, Al10Cr14Nb1Mo1W1Ni30 and Al9.5Cr14.5Nb1Mo1.5W1Ni28.5 were produced. XRD measurements were carried out between 2θ=15⁰-90⁰. The surface morphologies of the synthesized alloys were imaged by scanning electron microscope (Zeiss Sigma 300). XRD results showed that both the pure Ni3Al structure and the doped alloys are in polycrystalline structure. In the pure Ni3Al alloy, in addition to NiAl and Ni3Al structures, peaks belonging to the NiO compound were observed. In case of heavy metal doping, it has been determined that a low amount of Cr2O3 compound is formed. SEM images revealed that the surfaces of the alloys were generally homogeneous and pyramidal structures were obtained, which were oriented outward from the surface. The data obtained in the study provide promising results that if the produced alloys can be synthesized as single crystals, they may be a new alternative alloy system that can be used in high temperature applications.