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Solubility of Carbon in Nanocrystalline α-Iron

Published online by Cambridge University Press:  10 April 2013

Alexander Kirchner ,
Konrad Eymann ,
Peter Quadbeck ,
Alexander Strauß  and
Bernd Kieback
Alexander Kirchner
Affiliation:
Institute of Materials Science, Technische Universität Dresden, 01062 Dresden, Germany
Konrad Eymann
Affiliation:
Institute of Materials Science, Technische Universität Dresden, 01062 Dresden, Germany
Peter Quadbeck
Affiliation:
Fraunhofer Institute for Manufacturing Technology and Advanced Materials (IFAM), Winterbergstrasse 28, 01277 Dresden, Germany
Alexander Strauß
Affiliation:
Fraunhofer Institute for Manufacturing Technology and Advanced Materials (IFAM), Winterbergstrasse 28, 01277 Dresden, Germany
Bernd Kieback
Affiliation:
Institute of Materials Science, Technische Universität Dresden, 01062 Dresden, Germany Fraunhofer Institute for Manufacturing Technology and Advanced Materials (IFAM), Winterbergstrasse 28, 01277 Dresden, Germany
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Abstract

By using a thermodynamic model of nanocrystalline alloys the grain size effect on the solubility of carbon in α-iron is calculated. More specifically the enrichment at grain boundaries is predicted to result in a solubility enhancement. An experimental setup is devised to measure carbon solubility in nanocrystalline iron powder in equilibrium with graphite. At 390 °C a solubility of 0.514 at% is determined for nanocrystalline iron with a grain size of 23 nm.

Keywords

nanoscalegrain boundariesphase equilibria
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1526: Symposium TT – Defects and Microstructure Complexity in Materials , 2013 , mrsf12-1526-tt07-07
Copyright
Copyright © Materials Research Society 2013

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References

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