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Journal of Materials Science

, Volume 46, Issue 13, pp 4568–4573 | Cite as

Formation of sphalerite and wurtzite ZnO in Pd–Zn alloy after internal oxidation at elevated temperatures

  • Kei Watanabe
  • Norihito Sakaguchi
  • Seiichi Watanabe
Article

Abstract

The crystalline structures of zinc oxide (ZnO) formed by the internal oxidation of a Pd–Zn alloy were examined at elevated temperatures. Metastable sphalerite ZnO with a tetrahedral shape preferentially nucleated in the Pd matrix, while plate-like precipitates consisting of a wurtzite ZnO phase preferentially grew at a high temperature. Unique ZnO precipitates with trapezoidal cross-section and consisting of inter-layered sequences with sphalerite ZnO and wurtzite ZnO were also examined at an intermediate temperature. It is inferred that the formation of stacking faults in the sphalerite ZnO is strongly related to the nucleation of the wurtzite-type ZnO sequence.

Keywords

Orientation Relationship Volume Energy HRTEM Image Internal Oxidation Misfit Dislocation 

Notes

Acknowledgements

The authors would like to thank Mr. K. Sugawara and Mr. K. Ohkubo at HVEM laboratory, CAREM, Hokkaido University for their technical supports in the HVEM observations.

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Copyright information

© Springer Science+Business Media, LLC 2011

Authors and Affiliations

  • Kei Watanabe
    • 1
  • Norihito Sakaguchi
    • 2
  • Seiichi Watanabe
    • 2
  1. 1.Division of Materials Science and Engineering, Graduate School of EngineeringHokkaido UniversitySapporoJapan
  2. 2.Center for Advanced Research of Energy and Materials, Faculty of EngineeringHokkaido UniversitySapporoJapan

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