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Development of laser-based joining technology for the fabrication of ceramic thermoelectric modules

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.

Identiferoai:union.ndltd.org:DRESDEN/oai:qucosa:de:qucosa:39033
Date17 April 2020
CreatorsBörner, Floriana-Dana, Schreier, Max, Feng, Bing, Lippmann, Wolfgang, Martin, Hans-Peter, Michaelis, Alexander, Hurtado, Antonio
PublisherCambridge University Press
Source SetsHochschulschriftenserver (HSSS) der SLUB Dresden
LanguageEnglish
Detected LanguageEnglish
Typeinfo:eu-repo/semantics/publishedVersion, doc-type:article, info:eu-repo/semantics/article, doc-type:Text
Rightsinfo:eu-repo/semantics/openAccess
Relation0884-2914, 2044-5326, 10.1557/jmr.2014.216

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