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résistance thermique de contact (rtc)

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Faisabilité d'une méthode d'évaluation de la résistance thermique de contact entre une lamelle céramique écrasée sur un substrat métallique
A. Grimaud, M. Bouneder, S. Menecier, M. ElGanaoui
Journal:

Mechanics & Industry / Volume 8 / Issue 1 / January 2007

Published online by Cambridge University Press:

21 June 2007, pp. 71-75

Print publication:

January 2007
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On se propose d'évaluer une procédure de détermination expérimentale de la Résistance Thermique de Contact (RTC) entre une lamelle de céramique (de 1 μm d'épaisseur) obtenue par projection plasma et un substrat métallique lisse. La procédure consiste à soumettre la lamelle à un flux thermique et à déterminer expérimentalement le temps nécessaire à sa fusion et à effectuer le calcul du champ de température de la configuration dépôt-substrat, paramétré par la valeur de la RTC. Le flux thermique est apporté par un faisceau laser et la durée d'irradiation de la lamelle est donnée par la vitesse de déplacement de ce faisceau. Des résistances thermiques de contact de l'ordre de 10-4 m2.K/W ont été mesurées, ce qui étend la gamme des méthodes d'identification des RTC aux grandes valeurs.