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Study on the Microstructure of Internally Oxidized Ag–Sn–In Alloys

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Abstract

The microstructures of five internally oxidized Ag–Sn–In materials were investigated using ion polishing, field emission scanning electron microscopy and electron backscatter diffraction. The ion polished sections showed a subtle material contrast in the oxide particles that could be attributed to different oxide phases generated during internal oxidation. The phases could be identified as tetragonal SnO2 that surrounds the cubic In2O3 core of the combined oxide particles. It is shown that In2O3 exhibits an orientation relationship to the Ag matrix and for SnO2 and Ag another orientation relationship is likely. Interrupted internal oxidation experiments were applied to identify the growth mechanism of the oxide particles. A consistent view on the role of In during the internal oxidation of Ag–Sn–In alloys as heterogeneous nucleation agent of SnO2 is presented.

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Acknowledgement

The authors are thankful to the workgroup of Prof. Muecklich of the Saarland University for using their FIB preparation facilities. Thanks also to Mr. Ommer and Mrs. Bretzler of the Research Institute Precious Metals & Metals Chemistry, Schwaebisch Gmuend for their technical assistance.

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Author notes

  1. J. Fischer-Buehner

    Present address: Legor Group Srl, Vicenza, Italy

Authors and Affiliations

  1. Institute of Materials Science and Technology, Friedrich-Schiller-University Jena, Loebdergraben 32, 07743, Jena, Germany

    G. Schimmel & M. Rettenmayr

  2. Umicore AG & Co. KG, Rodenbacher Chaussee 4, 63457, Hanau-Wolfgang, Germany

    B. Kempf

  3. Indutherm GmbH, Walzbachtal, Germany

    J. Fischer-Buehner

Authors
  1. G. Schimmel
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  2. M. Rettenmayr
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  3. B. Kempf
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  4. J. Fischer-Buehner
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Corresponding author

Correspondence to G. Schimmel.

Additional information

J. Fischer-Buehner—Formerly with Research Institute Precious Metals & Metals Chemistry, Katharinenstr. 17, 73525 Schwaebisch Gmuend, Germany.

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Schimmel, G., Rettenmayr, M., Kempf, B. et al. Study on the Microstructure of Internally Oxidized Ag–Sn–In Alloys. Oxid Met 70, 25–38 (2008). https://doi.org/10.1007/s11085-008-9109-y

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  • DOI: https://doi.org/10.1007/s11085-008-9109-y

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