High-Temperature Low-Cycle Fatigue Behaviour of MAR-M247 Coated with Newly Developed Thermal and Environmental Barrier Coating

Figure 1

The microstructure of the TEBC system deposited onto the MAR-M247 superalloy substrate. List of insets: (a) detail of the mullite + hexacelsian upper layer; (b) the mullite + hexacelsian/YSZ interface; (c) detail of the YSZ interlayer; (d) the YSZ/BC interface; (e) the CoNiCrAlY BC; (f) the BC/MAR-M247 interface with Al₂O₃ grit particle.