TP53 : Synthesis and investigation of the hot corrosion, oxidation and electrochemical behaviors of the MCrAlY/MAX- Cr2AlC, used in gas turbine copmponents
Thesis > Central Library of Shahrood University > Chemical and Materials Engineering > MSc > 2023
Authors:
Sadegh Khodabandeh loo [Author], [Supervisor], Hamid Haratizadeh[Supervisor]
Abstarct: In the production of widely used equipment, especially rotor and stator blades of gas turbines, there has always been an effort to increase the working time of these parts, in addition to creating economic savings, to achieve higher efficiency for this equipment. Considering that the destruction mechanisms of these parts are guided by the two phenomena of hot corrosion and oxidation at high temperatures and from their surface, for this purpose processes and materials that protect the surface of this equipment against the above factors have a special place in They have this field. The development of different types of thermal barrier coatings (TBC), diffusion coatings (DC), and overlay coatings can be considered as a solution in this field. During the last twenty years, various research has been conducted on their high-temperature applications with the synthesis of nanolaxyer carbides and nitrides called MAX phase ceramics. In the leading research, first by using the mechanical alloying method and solid-state diffusion process, the synthesis of Cr2AlC carbide compound, which is a family of Max phase ceramics, was done, with the help of solution technique, a composite of Cr2AlC Max phase was made with CoNiCrAlY compound in different percentages of 5 % to 15% was produced using the spark plasma sintering (SPS) process, and then with the help of high-temperature tests such as hot corrosion in the presence of Na2SO4 and V2O5 salt and oxidation at 900℃, the high-temperature properties of this composite have been investigated. The performance of the protective oxide laxyer formed during hot corrosion and oxidation tests was investigated and studied using polarization and electrochemical impedance methods.
Keywords:
#Cr2AlC #MAX Phase #high temperature coating #high temperature corrosion #oxidation #Gas turbine #Al2O3 Keeping place: Central Library of Shahrood University
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