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Étude des conditions de brasure entre cuivre et Fe2VAl pour applications thermoélectriques

Nizet, Loic
(2018)

Files

Nizet_43081300_2018.pdf
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Details

Supervisors
Jacques, Pascal
Faculty
Ecole polytechnique de Louvain
Degree label
Master [120] : ingénieur civil en chimie et science des matériaux
Abstract
enThermoelectric applications are taking more and more importance for the industrial envi-ronment during last years, especially due to the use of heat which would be lost without thisapplication. Actually, few technologies could harness heat below 500K, on the contrary of some thermoelectric devices. A lot’s of application are already in the market for this heat recovery. Theses applications are based of traditional materials (Bi2Te3). But the problem of this type of materials is the production cost, even if the thermoelectric performances are good. So, new thermoelectric materials are developed for a few years, with the objective to replace in the long term current materials. One of these candidates is the Fe2VAl. A big problem for the thermoelectric devices based on Fe2VAl is the loss of electrical power inside the device, due to the high value of the electrical contact restistivity between Fe2VAl and the materials which compose the junctions (often copper). Currently, one of the objectives for this type of device is to find the best technical assembly which minimize the electrical contact resistivity. One candidate is the brazing between elements. It’s why the analyze of operatory conditions would be interesting to find the best conditions which minimize the resistivity of electrical contact.