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Ultra‐Fast One‐Step Fabrication of Cu 2 Se Thermoelectric Legs With Ni–Al Electrodes by Plasma‐Activated Reactive Sintering Technique
Author(s) -
Wu Linchun,
Su Xianli,
Yan Yonggao,
Uher Ctirad,
Tang Xinfeng
Publication year - 2016
Publication title -
advanced engineering materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 114
eISSN - 1527-2648
pISSN - 1438-1656
DOI - 10.1002/adem.201500548
Subject(s) - materials science , thermoelectric effect , fabrication , sintering , electrode , thermoelectric materials , electrical resistivity and conductivity , metallurgy , thermoelectric generator , spark plasma sintering , composite material , thermal conductivity , electrical engineering , thermodynamics , chemistry , medicine , physics , engineering , alternative medicine , pathology
In this study, a novel ultra‐fast method is developed to fabricate thermoelectric (TE) legs and electrodes from raw elemental materials in just one‐step plasma‐activated reactive sintering (PARS) process. We have demonstrated this approach with TE legs made of Cu 2 Se and the Ni–Al multiphase composite electrode. The obtained Cu 2 Se material shows a maximum ZT value of 0.9 at 773 K. The lowest specific interfacial resistivity of the as‐prepared Cu 2 Se/electrode junction is about 30 mΩ cm 2 at room temperature. The interfacial bonding strength is about 10 MPa. This method shows great prospects for large‐scale, low‐cost, and rapid fabrication of thermoelectric modules.