A.G. Evans et al. Journal of the European Ceramic Society 28(2008)1405-1419 1407 EXPLODED DESIGNATION REQUIREMENTS VIEW T, >T THERMAL Low Thermal Conductivity. OXIDE Microstructural Stability Chemical Compatibility MAy30MAYMAT2 Scale Change -A2O3 THERMALLY Minimum Thickness GROWN OXIDE TGO) Controlled defects Adherent With BC TGO Chemically Homogeneous orms o-A22O Devoid Of Segregants Creep Resistant. (b) TBC ond Coat Superalloy 50u on zone 20 um Fig. 2. An exploded view of the tri-layer thermal barrier system indicating the functionalities of each of the layers. Cross sections of actual systems are included.A.G. Evans et al. / Journal of the European Ceramic Society 28 (2008) 1405–1419 1407 Fig. 2. An exploded view of the tri-layer thermal barrier system indicating the functionalities of each of the layers. Cross sections of actual systems are included