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Journal of Materials Science

, Volume 54, Issue 7, pp 5813–5824 | Cite as

An improved method for the matrix dissolution extraction of nanoparticles from microalloyed steel

  • Andreas Hegetschweiler
  • Thorsten Staudt
  • Tobias KrausEmail author
Metals
  • 159 Downloads

Abstract

The chemical extraction of niobium and titanium carbonitride precipitates from microalloyed steels was studied. Steel samples and chemically synthesized reference nanoparticles were subjected to commonly used extraction protocols, and conditions were systematically varied. High acid concentrations led to particle etching with losses above 10%; long extraction times and small etchant volumes led to the formation of dense SiOx networks that engulfed the extracted particles. The addition of surfactants was found to reduce agglomeration and limit etching. We developed an optimized extraction protocol that can extract and retain particles with diameters below 10 nm with reduced etching and negligible network formation. The resulting particle dispersions are suitable both for efficient electron microscopy of large particle numbers in a single run and colloidal analysis of large numbers of particles in dispersion.

Notes

Acknowledgements

The authors would like to thank Eduard Arzt for his continuing support of the project. Andrea Jung is also acknowledged for the elementary analysis, Kathrin Alt for particle dissolution experiments, and Bastian Philippi for Matcalc Simulations.

Funding

This work was funded by the “AG der Dillinger Hüttenwerke” in Germany and a patent for a particle extraction procedure aided by a dispersant was submitted.

Supplementary material

10853_2018_3263_MOESM1_ESM.docx (20 kb)
Supplementary material 1 (DOCX 18 kb)

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  • Andreas Hegetschweiler
    • 1
  • Thorsten Staudt
    • 2
  • Tobias Kraus
    • 1
    • 3
    Email author
  1. 1.INM - Leibniz Institute for New MaterialsSaarbrückenGermany
  2. 2.AG der Dillinger HüttenwerkeDillingen/SaarGermany
  3. 3.Colloid and Interface ChemistrySaarland UniversitySaarbrückenGermany

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