An atom probe tomography study of the oxide–metal interface of an oxide intrusion ahead of a crack in a polycrystalline Ni-based superalloy. (1st March 2015)

• Record Type: Journal Article
• Authors: Kitaguchi, H.S.; Moody, M.P.; Li, H.Y.; Evans, H.E.; Hardy, M.C.; Lozano-Perez, S.
• Is Part Of: Scripta materialia. Volume 97(2015)
• Page Start: 41
• Page End: 44
• Publication Date: 2015-03-01
• Subjects: Superalloys -- Cracks -- Oxide intrusions -- High-temperature oxidation -- Atom probe tomography; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2014.10.025
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract : Intergranular oxide intrusions formed ahead of a crack in a Ni-based superalloy at 650 °C have been examined using three-dimensional atom probe tomography. Of two scans undertaken, a thin (∼5 nm) alumina layer was observed next to the alloy substrate in one, overlaid by a chromia layer. In the second, chromia penetrated to the alloy interface. The chromia layer contained Ti in solution as well as discrete particles of TiO2 .