Atom probe study of chromium oxide spinels formed during intergranular corrosion. (1st April 2015)

• Record Type: Journal Article
• Authors: La Fontaine, Alexandre; Yen, Hung-Wei; Felfer, Peter J.; Ringer, Simon P.; Cairney, Julie M.
• Is Part Of: Scripta materialia. Volume 99(2015)
• Page Start: 1
• Page End: 4
• Publication Date: 2015-04-01
• Subjects: Atom probe tomography -- Corrosion -- Oxidation -- Stainless steel -- Chromium oxide spinels; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2014.09.028
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract : Atom probe microscopy has been used to study the inhomogeneous nature of chromium oxide spinels in intergranular corrosion of a 253 MA austenitic stainless steel after thermal cycling up to 970 °C in air. The results indicate that the non-continuous character of the spinel layers originates from nanoscale phases such as iron-rich oxides along the chromite grain boundaries and silicate particles. Their role in the rate of intergranular corrosion is discussed.