Laser-Assisted Field Evaporation of Chromia with Deep Ultraviolet Laser Light
Artikel i vetenskaplig tidskrift, 2024

In this work, samples of chromia (Cr2O3) scale have been prepared for atom probe tomography and field evaporated with deep ultraviolet laser light (258 nm wavelength). The investigated range of laser energies spans more than three orders of magnitude between 0.03 and 90 pJ. Furthermore, the effects of detection rate and temperature were investigated. Simultaneous voltage and laser pulses were employed on additional needle specimens to reduce the standing voltage and minimize background noise during the measurement. Smooth evaporation with minimal mass spectrum peak tails was maintained over the whole range of measurement parameters. High laser energies result in significant underestimation of the oxygen content. Only laser energies below 1 pJ resulted in measured values near the expected oxygen content of 60 at%, the closest being about 58 at%.

oxide

atom probe tomography

chromia

oxygen quantification

laser-assisted atom probe tomography

parameter study

Författare

Severin Jakob

Chalmers, Fysik, Mikrostrukturfysik

Andrea Fazi

Chalmers, Fysik, Mikrostrukturfysik

Mattias Thuvander

Chalmers, Fysik, Mikrostrukturfysik

Microscopy and Microanalysis

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

Vol. In Press

Ämneskategorier

Bearbetnings-, yt- och fogningsteknik

Atom- och molekylfysik och optik

DOI

10.1093/mam/ozae111

PubMed

39541182

Mer information

Senast uppdaterat

2024-11-27