Investigation of the Evolution of the Oxide Scale Formed on 310 Stainless Steel Oxidized at 600 °C in Oxygen with 40% Water Vapour Using FIB and TEM
Artikel i vetenskaplig tidskrift, 2009

Detailed microstructure investigations were performed on oxide scales formed on 310 stainless steel exposed isothermally at 600 °C to O2 with 40% water vapour for 1–336 h. FIB microscopy was used to study the evolution of the surface morphology and to prepare cross-section TEM thin foils of the oxide scales. The foils were investigated by analytical transmission electronmicroscopy. The results showed that a thin protective base oxide scale had formed after 1 h. Due to Cr loss from the oxide scale through water vapour induced Cr evaporation, local breakaway oxidation occurs, resulting in the formation of oxide nodules. The development of these nodules depends on whether a new Cr-rich healing layer is formed or not. A model for the evolution of the oxide scale is proposed based on the results regarding the composition and distribution of various phases in the oxide scale and subjacent steel.

Water vapour

EDX

Fe–Cr–Ni alloy

FIB

Microstructure

High temperature oxidation

TEM

Författare

Fang Liu

Chalmers, Teknisk fysik, Mikroskopi och mikroanalys

Jun Eu Tang

Chalmers, Teknisk fysik, Mikroskopi och mikroanalys

Henrik Asteman

Chalmers, Kemi- och bioteknik, Oorganisk miljökemi

Jan-Erik Svensson

Chalmers, Kemi- och bioteknik, Oorganisk miljökemi

Lars-Gunnar Johansson

Chalmers, Kemi- och bioteknik, Oorganisk miljökemi

Mats Halvarsson

Chalmers, Teknisk fysik, Mikroskopi och mikroanalys

Oxidation of Metals

0030-770X (ISSN) 1573-4889 (eISSN)

Vol. 71 77-105

Ämneskategorier

Annan materialteknik

DOI

10.1007/s11085-008-9130-1