TY - CONF A1 - Müller, Bernd R. A1 - Mack, D.E. A1 - Laquai, René A1 - Helle, O. A1 - Sebold, D. A1 - Vaßen, R. A1 - Bruno, Giovanni T1 - Evolution of porosity, crack density, and CMAS penetration in thermal barrier coatings subjected to burner rig testing N2 - Degradation of thermal barrier coatings (TBCs) in gas‐turbine engines due to calcium–magnesium–aluminosilicate (CMAS) glassy deposits from various sources has been a persistent issue since many years. In this study, state of the art electron microscopy was correlated with X‐ray refraction techniques to elucidate the intrusion of CMAS into the porous structure of atmospheric plasma sprayed (APS) TBCs and the formation and growth of cracks under thermal cycling in a burner rig. Results indicate that the sparse nature of the infiltration as well as kinetics in the burner rig are majorly influenced by the wetting behavior of the CMAS. Despite the obvious attack of CMAS on grain boundaries, the interaction of yttria‐stabilized zirconia (YSZ) with intruded CMAS has no immediate impact on structure and density of internal surfaces. At a later stage the formation of horizontal cracks is observed in a wider zone of the TBC layer. T2 - Eleventh Joint BER II and BESSY II User Meeting CY - Wilhelm-Conrad-Roentgen-Campus, Berlin-Adlershof, Germany DA - 04.12.2019 KW - Characterization KW - CMAS KW - Synchrotron X-ray refraction radiography KW - Thermal arrier coatings PY - 2019 AN - OPUS4-49857 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -