Peculiarities of thermoelectric half-Heusler phase formation in Zr-Co-Sb ternary system

被引:20
|
作者
Romaka, V. V. [1 ,3 ]
Romaka, L. [2 ]
Rogl, P. [3 ]
Stadnyk, Yu [2 ]
Melnychenko, N. [2 ,4 ]
Korzh, R. [1 ]
Duriagina, Z. [1 ]
Horyn, A. [2 ]
机构
[1] Lviv Polytech Natl Univ, Dept Appl Mat Sci & Mat Engn, UA-79013 Lvov, Ukraine
[2] Ivan Franko Lviv Natl Univ, Dept Inorgan Chem, UA-79005 Lvov, Ukraine
[3] Univ Vienna, Inst Phys Chem, A-1090 Vienna, Austria
[4] Army Acad, UA-79012 Lvov, Ukraine
关键词
Antimonides; Phase diagrams; X-ray diffraction; Half-Heusler phases; Electronic structure; ZIRCONIUM; TRANSPORT; TITANIUM; CRYSTAL; ALLOYS; MGAGAS; COBALT;
D O I
10.1016/j.jallcom.2013.09.097
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The phase equilibria in the Zr-Co-Sb ternary system were studied at 873 K by means of X-ray and metallographic analyses in the whole concentration range. The interaction between the elements results the formation of four ternary compounds at investigated temperature: ZrCoSb (MgAgAs-type), Zr6CoSb2 (K2UF6-type), Zr5CoSb3 (Hf5CuSn3-type) and Zr5Co0.5Sb2.5 (W5Si3-type). The limited composition Zr5CoSb3 of the solid solution based on the Zr5Sb3 4 binaries is considered as compound with Hf5CuSn3 structure type. The influence of the disordering and defects in the crystal structure of ZrCoSb on the physical properties was analyzed. The performed electronic structure calculations are in good agreement with electrical and magnetic studies. (C) 2013 Elsevier B. V. All rights reserved.
引用
收藏
页码:448 / 454
页数:7
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