Abstract
The ablation behaviors of an as-annealed aluminized Ir (IrAl/Ir) coating sample and two aluminized Ir (IrAl 2.7(3) /IrAl/Ir) coating samples were investigated in a plasma wind tunnel for up to 2000s. The IrAl/Ir and IrAl 2.7(3) /IrAl/Ir coating samples showed quite different thermal responses, with ablation resistance limits of ~3.35 MW/m2 and ~3.75 MW/m2 , respectively, due to their different oxidation mechanisms. The failure mechanisms of both Ir–Al intermetallic coating samples were closely related to the melting of Al2 O3 coating due to over-temperature. The results indicated that the Ir–Al is a promising non-ablative thermal protection coating material used in non-equilibrium oxidizing environment up to 2000 °C.
Original language | English |
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Pages (from-to) | 302-310 |
Journal | Surface and Coatings Technology |
Volume | 367 |
Online published | 6 Apr 2019 |
DOIs | |
Publication status | Published - 15 Jun 2019 |
Externally published | Yes |
Research Keywords
- Ablation resistance
- Intermetallic coating
- Oxidation
- Plasma wind tunnel