Understanding the initial stage oxidation and microstructural evolution of detonation sprayed NiCoCrAlY bond coat using in-situ high-temperature X-ray diffraction

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dc.contributor.authorKala, V.
dc.contributor.authorSanthy, K.
dc.contributor.authorGovindarajan, G.
dc.contributor.authorRajasekaran, B.
dc.date.accessioned2026-02-04T12:27:42Z
dc.date.issued2022
dc.description.abstractThis study focuses on in-situ high-temperature X-ray diffraction (HT-XRD) investigation to understand the oxidation, microstructural evolution, and recrystallization of the NiCoCrAlY bond coat. HT-XRD analysis was carried out at a constant temperature of 1423 K for 3 h in a 10−4 Pa vacuum. The formation of α-Al<inf>2</inf>O<inf>3</inf>, Cr<inf>2</inf>O<inf>3</inf>, Co<inf>3</inf>O<inf>4</inf>, and NiCr<inf>2</inf>O<inf>4</inf> oxides and microstructural evolution, such as homogenization of phases (γ and β) during in-situ HT-XRD, has been analyzed with FE-SEM (EDS), Density Functional Theory calculations and Rietveld refinement's support. β-(Ni,Co)Al phase depletion (by 77%) was found at 1423 K during the HT-XRD; however, no TGO formation was noticed. © 2022 Elsevier Ltd
dc.identifier.citationCorrosion Science, 2022, 207, , pp. -
dc.identifier.issn0010938X
dc.identifier.urihttps://doi.org/10.1016/j.corsci.2022.110521
dc.identifier.urihttps://idr.nitk.ac.in/handle/123456789/22388
dc.publisherElsevier Ltd
dc.subjectAlumina
dc.subjectAluminum alloys
dc.subjectAluminum oxide
dc.subjectChromium alloys
dc.subjectCobalt alloys
dc.subjectDensity functional theory
dc.subjectMicrostructural evolution
dc.subjectOxidation
dc.subjectRietveld refinement
dc.subjectSuperalloys
dc.subjectTernary alloys
dc.subjectAnd selective oxidation (C)
dc.subjectHigh-temperature X-ray diffraction
dc.subjectNickel (A)
dc.subjectRietveld refinement (B)
dc.subjectSelective oxidation
dc.subjectSEM (B)
dc.subjectSuperalloy (A)
dc.subjectXRD
dc.subjectXRD (B)
dc.subjectNickel
dc.titleUnderstanding the initial stage oxidation and microstructural evolution of detonation sprayed NiCoCrAlY bond coat using in-situ high-temperature X-ray diffraction

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