Abstract
This research work investigates a new type of polymer-based magnetocaloric composite. Using PMMA as polymeric matrix and the magnetocaloric material Gd5.09Ge2.03Si1.88 as reinforcement,no influence of the presence of polymer on the magnetic properties of Gd5.09Ge2.03Si1.88 were observed. Three types of composites with different PMMA content were fabricated by mixing the components and curing the composite. The composites were evaluated by their mechanical, physicochemical and morphological properties.The proposed PMMA composite MC10 presented the smallest elastic modulus but highest Vickers hardness (6.61 ± 0.08 GPa and 22.10 ± 1.29 HV, respectively). The composites showed asatisfactorymagnetocaloriceffect (MCE)“peak” of -7 J/kgK. With the results, this composite can be a potential candidate for applications as Active Magnetic Regenerator in magnetic heat pumps.
Highlights
After the discovery of the giant magnetocaloric effect (GMCE) in the Gd5Ge2Si2alloy by Pecharsky and Gschneidnerin[1,2], interest and research about magnetic heat pumps increased significantly, resulting in the development of novel magnetocaloric materials and prototypes[3,4,5,6]
The present paper reports and discusses the mechanical and magnetic properties of a magnetocaloric composite, which was processed with a polymer matrix based on poly(methyl methacrylate) (PMMA) and Gd5.09Ge2.03Si1.88 magnetocaloric
Thermogravimetric analysis (TGA) analysis showed that the manufactured samples had between 15% and 18% of polymer, different from the proposed, indicating no interpretations based on concentration
Summary
After the discovery of the giant magnetocaloric effect (GMCE) in the Gd5Ge2Si2alloy by Pecharsky and Gschneidnerin[1,2], interest and research about magnetic heat pumps increased significantly, resulting in the development of novel magnetocaloric materials and prototypes[3,4,5,6]. One of the main advantages of materials based on the magnetocaloric effect (MCE) is its potential application in solid-state magnetic cooling, since most refrigeration technology relies on the conventional gas compression technique, which has drawn increasing criticisms due to its lack of efficiency and use of air-pollutant gases[7,8,9]. The present paper reports and discusses the mechanical and magnetic properties of a magnetocaloric composite, which was processed with a polymer matrix based on poly(methyl methacrylate) (PMMA) and Gd5.09Ge2.03Si1.88 magnetocaloric. The isothermal entropy variation for the composite, which is a characterization of the MCE, is presented and compared with the as-cast alloy
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
