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1515 |
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Wednesday, June 04, 2008, Room 04 1:40 PM Gasturbines 5 Coatings for mobile and stationary turbines, protection against wear, high temperature corrosion and thermal stresses, clearance control coatings for a better efficiency |
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New generation perovskite thermal barrier coating materials |
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Wen Ma / School of Materials Science and Engineering, Inner Mongolia University of Technology, China Maria Ophelia Jarligo* / Forschungszentrum Jülich GmbH, Institute of Energy Research (IEF), IEF-1: Materials Synthesis and Processing, Germany Daniel Mack/ Forschungszentrum Jülich GmbH, Institute of Energy Research (IEF), IEF-1: Materials Synthesis and Processing, Germany Robert Vaßen/ Forschungszentrum Jülich GmbH, Institute of Energy Research (IEF), IEF-1: Materials Synthesis and Processing, Germany Detlev Stöver/ Forschungszentrum Jülich GmbH, Institute of Energy Research (IEF), IEF-1: Materials Synthesis and Processing, Germany |
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Advanced ceramic materials of perovskite structure have been developed for potential application in thermal barrier coating systems in an effort to improve the properties of the pre-existing ones like yttria stabilized zirconia. Yb2O3 and Gd2O3 doped strontium zirconate (SrZrO3) and barium magnesium tantalate (Ba(Mg1/3Ta2/3)O3) of the ABO3 and complex A(B1/3B?2/3)O3 systems respectively, have been synthesized through mechanical milling prior to solid state sintering. Thermal and mechanical investigations show desirable properties for high temperature coating applications. On atmospheric plasma spraying, the newly developed TBCs reveal promising thermal cycle lifetime above 1300oC. |