The Nanostructure of the Oxide Formed on Fe-10Cr-4Al Exposed in Liquid Pb
Journal article, 2021

An Fe-10Cr-4Al alloy containing reactive elements developed for application in high-temperature liquid lead environments was analyzed after exposure in 600 and 750°C lead with dissolved oxygen for 1,000-2,000 h. Atom probe tomography, transmission electron microscopy, and X-ray scattering were all used to study the protective oxide formed on the surface. Exposure at 750°C resulted in a 2-μm thick oxide, whereas the 600°C exposure resulted in a 100-nm thick oxide. Both oxides were layered, with an Fe-Al spinel on top, and an alumina layer toward the metal. In the 600°C exposed material, there was a Cr-rich oxide layer between the spinel and the alumina. Metallic lead particles were found in the inner and middle parts of the oxide, related to pores. The combination of the experimental techniques, focusing on atom probe tomography, and the interpretations that can be done, are discussed in detail.

liquid lead

atom probe tomography

FeCrAl

reactive elements

oxide

Author

Kristina Lindgren

Chalmers, Physics, Microstructure Physics

Peter Dömstedt

Royal Institute of Technology (KTH)

Peter Szakalos

Royal Institute of Technology (KTH)

Mattias Thuvander

Chalmers, Physics, Microstructure Physics

Microscopy and Microanalysis

1431-9276 (ISSN) 1435-8115 (eISSN)

Vol. In Press

Subject Categories

Inorganic Chemistry

Materials Chemistry

Corrosion Engineering

Driving Forces

Sustainable development

Areas of Advance

Energy

Materials Science

Infrastructure

Chalmers Materials Analysis Laboratory

DOI

10.1017/S1431927621000337

More information

Latest update

5/11/2021