Ablation behaviors of Ir–Al intermetallic coatings in a plasma wind tunnel

Yuanlin Ai, Shuxin Bai, Li'an Zhu*, Yicong Ye, Hong Zhang, Shun Li, Yu Tang, Kaili Zhang, Ruixin Wang

*Corresponding author for this work

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

11 Citations (Scopus)

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 languageEnglish
Pages (from-to)302-310
JournalSurface and Coatings Technology
Volume367
Online published6 Apr 2019
DOIs
Publication statusPublished - 15 Jun 2019
Externally publishedYes

Research Keywords

  • Ablation resistance
  • Intermetallic coating
  • Oxidation
  • Plasma wind tunnel

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