Vacancy site occupation by Co and Ir in half-Heusler ZrNiSn and conversion of the thermoelectric properties from n-type to p-type

被引：58

作者：

Kimura, Yoshisato ^{[1
]}

Tanoguchi, Toshiyasu ^{[1
]}

Kita, Takuji ^{[2
]}

机构：

[1] Tokyo Inst Technol, Interdisciplinary Grad Sch Sci & Engn, Dept Mat Sci & Engn, Midori Ku, Yokohama, Kanagawa 2268502, Japan

[2] Toyota Motor Co Ltd, Higashifuji Tech Ctr, Adv Mat Engn Div, Shizuoka 4101193, Japan

来源：

ACTA MATERIALIA | 2010年 / 58卷 / 13期

关键词：

Thermoelectric properties; Thermal conductivity; Intermetallic compounds; Crystal structure; Directional solidification; TRANSPORT-PROPERTIES; M-A; M-B; ZR; HF;

D O I：

10.1016/j.actamat.2010.04.028

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The n-type thermoelectric properties of the half-Heusler compound ZrNiSn can be converted to p-type by the addition of Co and Ir. We found that Co and Ir atoms preferably occupy the vacancy sites instead of substituting at Ni sites. This implies that the phase stability of the compound gradually changes towards that of the Heusler compound Zr(Ni,M)(2)Sn, where M is Co and/or Ir. The occupation of vacancy sites by Co and Ir atoms leads to a drastic reduction in lattice thermal conductivity owing to the enhancement of phonon scattering by the solid solution effect. (C) 2010 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

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页码：4354 / 4361

页数：8

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