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Recherche sur la corrosion et les propriétés magnétiques du composite La(Fe, Si)13HY/10Co4Cr-WC préparé par pulvérisation plasma.
Research on the corrosion and magnetic properties of La(Fe, Si)13HY/10Co4Cr-WC composite prepared by plasma spraying.
Résumé
La(Fe, Si)13Hy has been regarded as one of the most promising magnetocaloric materials near room temperature. However, the corrosion resistance is poor result from the large corrosion potential difference of the multiphase coexisted in La(Fe, Si)13Hy. In this work, the 10Co4Cr-WC coated La(Fe, Si)13Hy composites were prepared by plasma spraying. The corrosion behavior, microstructure and magnetic properties were investigated. The corrosion resistance improves with the increase of 10Co4Cr-WC coating thickness. The corrosion potential (Ecorr) is -21 mV and corrosion current (Icorr) is 4.01×10-7 A/cm2 for the sample with the coating thickness of 90 μm. The Curie temperature TC decrease from 290 K to 262 K with the coating thickness increase from 20 μm to 90 μm caused by partial dehydrogenation during the plasma spraying process. The maximum magnetic entropy change ΔSm is 9.76-11.5 J/kg·K for the La(Fe, Si)13Hy/10Co4Cr-WC composite under the magnetic field of 0-2 T. The composite shows good corrosion resistance and large magnetocaloric effect, which represents plasma spraying is a competitive way to improve the corrosion resistance.
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Détails
- Titre original : Research on the corrosion and magnetic properties of La(Fe, Si)13HY/10Co4Cr-WC composite prepared by plasma spraying.
- Identifiant de la fiche : 30032623
- Langues : Anglais
- Sujet : Technologie
- Source : 10th IIR Conference on Caloric Cooling and Applications of Caloric Materials
- Date d'édition : 24/08/2024
- DOI : http://dx.doi.org/10.18462/iir.thermag.2024.0015
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