Partager

Conductivité thermique à faible température de l'alliage d'aluminium 5056.

Low temperature thermal conductivity of aluminum alloy 5056.

Auteurs : BAUDOUY B., FOUR A.

Type d'article : Article

Résumé

The thermal conductivity of 5056 aluminum alloy was determined from 4.2 K to 120 K using a differential steady-state method. This method has been implemented in a low temperature cryostat using a Gifford–McMahon cryocooler as heat sink. The thermal conductivity of the 5056 H39 aluminum alloy was determined since it was under consideration as a part of a thermal link for the Planck research satellite. As expected, below 10 K the thermal conductivity is exclusively given by the electron-defect scattering term. At higher temperature, the other terms from the electronic and the lattice contributions come into play but the electronic thermal conductivity term is still dominant. A workable fit, based on theory, is presented and can be used up to 300 K. Our measurements are compared with data at lower temperature and available fits from the literature.

Détails


Liens


Voir d'autres articles du même numéro (7)
Voir la source

Indexation