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Thermoelectric properties control of Half-Heusler compounds by lattice defects and interfaces introduced based on the close relationship with Heusler compounds

Published online by Cambridge University Press:  06 February 2015

Yoshisato Kimura ,
Yaw-Wang Chai ,
Toshinori Oniki ,
Takahiko Itagaki  and
Shinya Otani
Yoshisato Kimura
Affiliation:
Tokyo Institute of Technology, Materials Science and Engineering, 4259-J3-19 Nagatsuta-cho, Midori-ku, Yokohama 226-8502, Japan.
Yaw-Wang Chai
Affiliation:
Tokyo Institute of Technology, Materials Science and Engineering, 4259-J3-19 Nagatsuta-cho, Midori-ku, Yokohama 226-8502, Japan.
Toshinori Oniki
Affiliation:
Tokyo Institute of Technology, Materials Science and Engineering, 4259-J3-19 Nagatsuta-cho, Midori-ku, Yokohama 226-8502, Japan.
Takahiko Itagaki
Affiliation:
Tokyo Institute of Technology, Materials Science and Engineering, 4259-J3-19 Nagatsuta-cho, Midori-ku, Yokohama 226-8502, Japan.
Shinya Otani
Affiliation:
Tokyo Institute of Technology, Materials Science and Engineering, 4259-J3-19 Nagatsuta-cho, Midori-ku, Yokohama 226-8502, Japan.
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Abstract

Half-Heusler MNiSn (M=Ti, Zr, Hf) compounds are well-known, excellent n-type thermoelectric materials. The n-type Seebeck coefficients of ZrNiSn are reduced because of the precipitation of the metallic Heusler ZrNi2Sn phase. An excellent n-type Seebeck coefficient can be converted to p-type based on the vacancy site occupation by the solute Co atoms in the half-Heusler TiNiSn phase as well as ZrNiSn. The Heusler phase precipitates, including their precursor nano-structure in the half-Heusler matrix and the vacancy site occupation of the half-Heusler phase, are regarded as lattice defects based on the crystallographically and thermodynamically close relationship between half-Heusler and Heusler phases.

Keywords

thermoelectriccrystallographic structurephase equilibria
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1760: Symposium YY – Advanced Structural and Functional Intermetallic-Based Alloys , 2015 , mrsf14-1760-yy05-26
Copyright
Copyright © Materials Research Society 2015 

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References

REFERENCES

for example , Aliev, F.G., Brandt, N.B., Moshchalkov, V.V., Kozyrkov, V.V., Skolozdra, R.V., and Belogorokhov, A.I., Phys. Z. B: Condens. Matter., 75 (1989), 167.CrossRefGoogle Scholar
Kimura, Y., Kuji, T., Zama, A., Shibata, Y. and Mishima, Y., MRS Symp. Proc.. vol. 886, Mater Res. Soc., Pittsburgh, PA, (2006), p.331.Google Scholar
Chai, Y. W. and Kimura, Y., Acta Mater., 61 (2013), 6684.CrossRefGoogle Scholar
Chai, Y. W., Yoshioka, K. and Kimura, Y., Scripta Mater., 83 (2014), 13.CrossRefGoogle Scholar
for example , Sahoo, P., Liu, Y., Poudeu, P.F., J. Mater. Chem. A, 2 (2014), 9298.CrossRefGoogle Scholar
Kimura, Y., Tanoguchi, T., and Kita, T., Acta Mater., 58 (2010), 4354.CrossRefGoogle Scholar
Kimura, Y., Tanoguchi, T., Sakai, Y., Chai, Y.W. and Mishima, Y., MRS Symp. Proc., vol.1295, Mater. Res. Soc., Pittsburgh, PA, (2011), p. 335.Google Scholar
Miyazaki, H., Nakano, T., Inukai, M., Soda, K., Izumi, Y., Muro, T., Kim, J.G., Takata, M., Matsunami, M., Kimura, S. and Nishino, Y., Mater. Trans., 55 (2014), 1209.CrossRefGoogle Scholar
Katsuyama, S., Matsushima, H. and Ito, M., J. Alloys and Compounds, 385 (2004), 232.CrossRefGoogle Scholar
Kimura, Y. and Zama, A., Appl. Phys. Lett., 89 (2006), 172110.CrossRefGoogle Scholar