High-temperature oxidation behavior of laser-aided additively manufactured NiCrAlY coating

M. Ansari, R. Shoja-Razavi, M. Barekat, Hau Chung Man

Research output: Journal article publicationJournal articleAcademic researchpeer-review

35 Citations (Scopus)

Abstract

� 2017 Elsevier Ltd In this study, NiCrAlY coatings were additively manufactured on the surface of IN738 substrate through a laser-aided additive manufacturing approach. The high-temperature oxidation behavior of freestanding coatings at 1200��C was also investigated. The coatings were thick, dense, and well-bonded with dendritic γ/β microstructure. The results proved that the coatings were able to withstand the operating temperature of 1200��C for up to ten cycles. After ten cycles of oxidation, the oxide scales formed on the coatings were mainly composed of α-Al2O3and Al5Y3O12phases; however, NiO, Cr2O3and Ni(Cr,Al)2O4phases were not detected.
Original languageEnglish
Pages (from-to)168-177
Number of pages10
JournalCorrosion Science
Volume118
DOIs
Publication statusPublished - 1 Apr 2017

Keywords

  • A. Metal coatings
  • A. Superalloys
  • C. High temperature corrosion
  • C. Oxidation

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Science(all)

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