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Improvement in oxidation resistance of Ni3Al based single crystal superalloy IC32 by NiAlHfSi coating

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

In order to improve the oxidation performance of IC32, the NiAlHfSi coating was deposited on the alloy by electron beam physical vapor deposition (EB-PVD) method. The oxidation resistance of the coated alloy at 1423 K was investigated. The microstructures of the samples before and after oxidation were examined by SEM, XRD and EPMA. It was found that the oxide scales compactly formed on the surface of the coating, and the oxidation mainly consisted of Al2O3 and NiAl2O4. Phase transformation occurred from β-NiAl to γ′-Ni3Al in the coating after oxidation for extend periods. The diffusion and oxidation of Mo were prevented effectively by the coating, which improved the oxidation performance of IC32 significantly.

Original languageEnglish
Title of host publicationHigh Performance Structure Materials
EditorsYafang Han, Junpin Lin, Chengbo Xiao, Xiaoqin Zeng
PublisherTrans Tech Publications Ltd
Pages604-612
Number of pages9
ISBN (Print)9783037856086
DOIs
StatePublished - 2013
EventChinese Materials Congress 2012, CMC 2012 - Taiyuan, China
Duration: 13 Jul 201218 Jul 2012

Publication series

NameMaterials Science Forum
Volume747-748
ISSN (Print)0255-5476
ISSN (Electronic)1662-9752

Conference

ConferenceChinese Materials Congress 2012, CMC 2012
Country/TerritoryChina
CityTaiyuan
Period13/07/1218/07/12

Keywords

  • IC32
  • Molybdenum
  • NiAlHfSi coating
  • Oxidation resistance

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