Table 2 Plasma spray parameters
| Parameters | Bond coat (NiCrAlY) | Top coat (ZrO2–8 wt% Y2O3) |
|---|---|---|
| I (A) | 500 | 450 |
| V (V) | 32–35 | 50–60 |
| P (kW) | 17–17.5 | 23–23.5 |
| Primary gas flow rate (Ar) (slpm) | 40 | 40 |
| Secondary gas flow rate (H2) (slpm) | Nil | 0.2 |
| Carrier gas flow (Ar) (slpm) | 5 | 5 |
| Powder feed rate (rpm) | 10 | 10 |
| Spraying distance (in cm) | 10 | 10 |