title: Interpreting atom probe data from chromium oxide scales.
abstract: Picosecond-pulsed ultraviolet-laser (UV-355 nm) assisted atom probe tomography (APT) was used to analyze protective, thermally grown chromium oxides formed on stainless steel. The influence of analysis parameters on the thermal tail observed in the mass spectra and the chemical composition is investigated. A new parameter termed "laser sensitivity factor" is introduced in order to quantify the effect of laser energy on the extent of the thermal tail. This parameter is used to compare the effect of increasing laser energy on thermal tails in chromia and chromite samples. Also explored is the effect of increasing laser energy on the measured oxygen content and the effect of specimen base temperature and laser pulse frequency on the mass spectrum. Finally, we report a preliminary analysis of molecular ion dissociations in chromia.
authors: School of Aerospace, Mechanical, Mechatronic Engineering, The University of Sydney, NSW 2006, Australia; Australian Centre for Microscopy and Microanalysis, The University of Sydney, NSW 2006, Australia.
authors: Alexandre
authors: A
authors: La Fontaine
authors: Department of Materials, University of Oxford, Parks Road, Oxford OX1 3PH, UK.
authors: Baptiste
authors: B
authors: Gault
authors: School of Aerospace, Mechanical, Mechatronic Engineering, The University of Sydney, NSW 2006, Australia; Australian Centre for Microscopy and Microanalysis, The University of Sydney, NSW 2006, Australia.
authors: Andrew
authors: A
authors: Breen
authors: School of Aerospace, Mechanical, Mechatronic Engineering, The University of Sydney, NSW 2006, Australia; Australian Centre for Microscopy and Microanalysis, The University of Sydney, NSW 2006, Australia.
authors: Leigh
authors: L
authors: Stephenson
authors: School of Aerospace, Mechanical, Mechatronic Engineering, The University of Sydney, NSW 2006, Australia; Australian Centre for Microscopy and Microanalysis, The University of Sydney, NSW 2006, Australia.
authors: Anna V
authors: AV
authors: Ceguerra
authors: School of Aerospace, Mechanical, Mechatronic Engineering, The University of Sydney, NSW 2006, Australia; Australian Centre for Microscopy and Microanalysis, The University of Sydney, NSW 2006, Australia.
authors: Limei
authors: L
authors: Yang
authors: School of Materials Science and Engineering, University of New South Wales, Sydney, NSW 2052, Australia.
authors: Thuan Dinh
authors: TD
authors: Nguyen
authors: School of Materials Science and Engineering, University of New South Wales, Sydney, NSW 2052, Australia.
authors: Jianqiang
authors: J
authors: Zhang
authors: School of Materials Science and Engineering, University of New South Wales, Sydney, NSW 2052, Australia.
authors: David J
authors: DJ
authors: Young
authors: School of Aerospace, Mechanical, Mechatronic Engineering, The University of Sydney, NSW 2006, Australia; Australian Centre for Microscopy and Microanalysis, The University of Sydney, NSW 2006, Australia. Electronic address: julie.cairney@sydney.edu.au.
authors: Julie M
authors: JM
authors: Cairney
keywords: Atom probe tomography; Corrosion; Field evaporation; Oxides