Open AccessDevelopment of laser-based joining technology for the fabrication of ceramic thermoelectric modules
Author(s) -
FlorianaDana Börner,
Max Schreier,
Bing Feng,
Wolfgang Lippmann,
HansPeter Martin,
A. Michaelis,
Antonio Hurtado
Publication year - 2014
Publication title -
journal of materials research/pratt's guide to venture capital sources
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.788
H-Index - 148
eISSN - 0884-2914
pISSN - 0884-1616
DOI - 10.1557/jmr.2014.216
Subject(s) - materials science , fabrication , ceramic , thermoelectric effect , thermoelectric materials , engineering physics , laser , nanotechnology , metallurgy , systems engineering , composite material , engineering , optics , thermal conductivity , medicine , alternative medicine , physics , pathology , thermodynamics
The process of laser-induced brazing constitutes a potential option for connecting several ceramic components (n- and p-type ceramic bars and ceramic substrate) of a thermoelectric generator (TEG) unit. For the construction of the TEGs, TiOx and BxC were used as thermoelectric bars and AlN was used as substrate material. The required process time for joining is well below that of conventional furnace brazing processes and, furthermore, establishes the possibility of using a uniform filler system for all contacting points within the thermoelectric unit. In the work reported here, the application-specific optimization of the laser-joining process is presented as well as the adapted design of the thermoelectric modules. The properties of the produced bonding were characterized by using fatigue strength and microstructural investigations. Furthermore, the operational reliability of the modules was verified
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