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A Thermodynamic Database For Simulation Of Cmas And Tbc Interactions, Lina Kjellqvist, Johan Brattberg, Ake Jansson, Huahai Mao
A Thermodynamic Database For Simulation Of Cmas And Tbc Interactions, Lina Kjellqvist, Johan Brattberg, Ake Jansson, Huahai Mao
Thermal Barrier Coatings IV
A thermodynamic database has been developed for calculating thermochemical interaction of thermal barrier coatings, namely 7YSZ (yttria partially stabilized zirconia), with CaO-MgO-Al2O3-SiO2 (CMAS) deposits. CaO-MgO-Al2O3-SiO2-Y2O3-ZrO2 is thus the core system for understanding and modeling of processes occurring between CMAS and TBC. A good thermodynamic description of all phases in the system is essential in modeling related to materials design and process optimization. An efficient technique used to obtain a self-consistent thermodynamic database is called the CALPHAD method [1], where the Gibbs energy of each phase is described with a mathematical model. The Gibbs energy of the total system is then …