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Identification, optimisation et mise en forme de matériaux intermétalliques pour la conversion thermomagnétique de la chaleur

Abstract : This PhD work aimed to select and shape suitable materials for thermomagnetic recovery of low energy fatal heat (T ≤ 232 °C). Thermomagnetic effect is explained as a consequence of the magnetic field and temperature dependence of the magnetization. This effect enables specific materials to convert heat into magnetic energy. This work laid emphasis on four types of intermetallic compounds with TC in 50-150 °C range. Derivatives compounds of LaFe13-χSiχ ternary alloy and three pseudo-binaries series Y2Fe17-xCoχ, Fe5-xMnχSn3 and Fe5-xMnχSi3. Publications show that, for LaFe13-χSiχ type, substitution of iron by cobalt and hydruration make the TC rise to the targeted range of temperature. Three nuances have been ordered to Erasteel and shaped by tape casting. All of the other compounds have been synthesized by ourself.Magnetic and thermomagnetic properties of compounds matching the targeted temperature range were measured. We synthesised large quantity of three nuances of Y2Fe17-xCoχ and they were sintered by thermal treatment following cold compression forming or SPS direct method. A thermomagnetic heat recovery demonstrator, relying on the Curie wheel principle, was made in the laboratory. We carried out thermal and magnetic simulations of the thermomagnetic heat recovery system. We enlightened the paramount importance of thermal engineering for the design of thermomagnetic heat recovery systems
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https://tel.archives-ouvertes.fr/tel-01868664
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Submitted on : Wednesday, September 5, 2018 - 4:28:07 PM
Last modification on : Monday, April 6, 2020 - 2:44:04 PM
Long-term archiving on: : Thursday, December 6, 2018 - 7:32:13 PM

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  • HAL Id : tel-01868664, version 1

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Alexy Dianoux. Identification, optimisation et mise en forme de matériaux intermétalliques pour la conversion thermomagnétique de la chaleur. Matériaux. Université de Lorraine, 2018. Français. ⟨NNT : 2018LORR0075⟩. ⟨tel-01868664⟩

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