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Journal of Electronic Materials

, Volume 39, Issue 9, pp 2008–2012 | Cite as

Reduced Grain Size and Improved Thermoelectric Properties of Melt Spun (Hf,Zr)NiSn Half-Heusler Alloys

  • Cui Yu
  • Tie-Jun Zhu
  • Kai Xiao
  • Jun-Jie Shen
  • Sheng-Hui Yang
  • Xin-Bing Zhao
Article

Half-Heusler thermoelectric materials Hf(/Zr)NiSn were prepared by levitation melting followed by melt-spinning to refine the boundary structures, and then they were consolidated by spark plasma sintering. X-ray diffraction analysis and scanning electron microscopy showed that single phased half-Heusler compounds without compositional segregation had been obtained. It was found that the thermoelectric properties, especially the thermal conductivity, depended strongly on the boundary structures. The melt-spinning samples with refined boundary structures had a lower thermal conductivity but a power factor comparable to that of the sample prepared by levitation melting, thus providing good thermoelectric properties.

Keywords

Half-Heusler thermoelectric melt-spinning 

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ACKNOWLEDGEMENTS

The work was supported by the National Basic Research Program of China (2007CB607502), the National “863” Hi-tech. Program of China (2007AA03Z234) and the Natural Science Foundation of China (50601022).

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Copyright information

© TMS 2009

Authors and Affiliations

  • Cui Yu
    • 1
  • Tie-Jun Zhu
    • 1
  • Kai Xiao
    • 1
  • Jun-Jie Shen
    • 1
  • Sheng-Hui Yang
    • 1
  • Xin-Bing Zhao
    • 1
  1. 1.State Key Laboratory of Silicon Materials, Department of Materials Science and EngineeringZhejiang UniversityHangzhouChina

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