Magnetic Property Changes of CoNiCrAlY Coating Under Cyclic Oxidation and Hot Corrosion

  title={Magnetic Property Changes of CoNiCrAlY Coating Under Cyclic Oxidation and Hot Corrosion},
  author={Kh. Rahmani},
  journal={Oxidation of Metals},
  • Kh. Rahmani
  • Published 25 November 2019
  • Materials Science
  • Oxidation of Metals
In this paper, a non-destructive method for evaluation of a CoNiCrAlY coating applied to gas turbine blades has been studied. The specimens from cast Ni-base superalloy IN738LC were coated with Co–34Ni–18.6Cr–8.7Al–0.5Y by low pressure plasma spray (LPPS) technique. The XRD peaks indicated that CoNiCrAlY coatings are composed of β-NiAl and γ-Co (Ni, Cr) matrix with small amounts of Al 2 O 3 and γ′-Ni 3 Al. The surfaces of the coated specimens were covered with thin salt mixture of Na 2 SO 4… 
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