Creep is a hazardous phenomenon, predominant in components subjected to extreme working conditions such as high temperatures and loads. It is responsible for the formation of primary cracks in components, which ultimately leads to the failure of entire component. The blade materials in gas turbines are subjected to creep during operating conditions. The creep behavior of turbine blades made of Nickel (Ni) based super-alloys, subjected to high temperatures and mechanical loads are analyzed. The Bailey-Norton model is used to characterize the creep behavior of the blade. Usually, ceramic matrix composites (CMC) are materials with better creep resisting properties compared to other materials. In this study, Silicon Carbide (SiC) fibers reinforced in SiC matrix are used as a coating for Ni based super-alloys to reduce the creeping behavior. The influence of CMC coating on attenuating the creep deformation of the turbine blade is studied. A comparative study is made between the alternative materials used for turbine blades, to find an optimal material in terms of creep life for gas turbine.

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