Functional, thermal and rheological properties of polymer-based magnetic composite filaments for additive manufacturing

Díaz-García, Álvaro; Law, Jia Yan; Félix, Manuel; Guerrero, Antonio Bernal; Franco, V.

doi:10.1016/j.matdes.2022.110806

Cited by 17 publications

(13 citation statements)

References 51 publications

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“…For the polymeric matrix of the composite filaments, (PLA) was chosen given its ease of processing and printing, both in its pure state and in combination with different types of fillers. 29,44,51,52 The manufacturing of the composite filaments was done according to the encapsulation procedure presented previously in Ref. 49.…”

Section: Methodsmentioning

confidence: 99%

“…This is because filling polymer with some types of spherical particles can cause the viscosity of the composite to drop below that of the pure polymer due to the so-called "ball-bearing" effect since these particles can reduce friction between different polymer layers. 51,53 In this case, lowering the extrusion temperature would be able to restore the viscosity to appropriate values. This may significantly lower energy consumption and cost during mass production.…”

Section: Methodsmentioning

confidence: 99%

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Polymer‐based filaments with embedded magnetocaloric Ni‐Mn‐Ga Heusler alloy particles for additive manufacturing

Díaz‐García,

Law,

Żrodowski

et al. 2024

Polymer Composites

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One important issue associated to magnetocaloric materials that hinders its technological application is the poor processability and structural integrity of those with the highest performance, usually intermetallics undergoing first‐order magnetic phase transitions. Additionally, the performance of these magnetocaloric materials highly depends on the structural stability of the magnetocaloric phase, which is, in many cases, very sensitive to temperature and mechanical processes. Additive manufacturing via the extrusion of polymer‐based composites is regarded as a promising way to overcome these issues. A recently presented manufacturing method of encapsulating functional fillers into polymer capsules has been used to produce a composite filament with a large load of magnetocaloric off‐stoichiometric Ni2MnGa Heusler alloy fillers with a uniform distribution throughout the polymer matrix as demonstrated by x‐ray tomography characterization. The incorporation of these metallic particles causes changes in the thermal behavior of the polymer as well as an increase in the flowability of the composite with respect to the polymer at the same temperature. The increased flowability of the composites found during manufacturing can be compensated by lowering the extrusion temperatures, making this technique even more convenient for preserving the filler properties, which is an important concern when additive manufacturing magnetocaloric materials. This is confirmed by the magnetic and magnetocaloric behavior of the composites, with responses proportional to the fraction of fillers.Highlights Ultrasonic‐atomization produces highly spherical Ni‐Mn‐Ga Heusler alloy particles. Ni‐Mn‐Ga filled polymer capsules allow a direct extrusion of composites for AM. X‐ray tomography shows uniform volumetric filler distribution within the filaments. Decreased viscosity of the matrix favors the lowering of the processing temperature. The low processing temperatures avoid altering the MCE of the alloy fillers.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Polymer‐based filaments with embedded magnetocaloric Ni‐Mn‐Ga Heusler alloy particles for additive manufacturing

Díaz‐García,

Law,

Żrodowski

et al. 2024

Polymer Composites

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“…This result was seen for both shear rheology at lower shear rates as well as high shear capillary viscosity. [ 121 ] Such characterization studies are important to set the input parameters of any 3D printing process.…”

Section: Advancement Of 3d Printing Of Polymers and Their Compositesmentioning

confidence: 99%

“…as high shear capillary viscosity. [121] Such characterization studies are important to set the input parameters of any 3D printing process.…”

Section: Printability Of Nanocompositesmentioning

confidence: 99%

High Thermal Conductivity Polymer Composites Fabrication through Conventional and 3D Printing Processes: State‐of‐the‐Art and Future Trends

Vijaybabu¹,

Ramesh

Pandipati

et al. 2023

Macro Materials & Eng

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The lifespan and the performance of flexible electronic devices and components are affected by the large accumulation of heat, and this problem must be addressed by thermally conductive polymer composite films. Therefore, the need for the development of high thermal conductivity nanocomposites has a strong role in various applications. In this article, the effect of different particle reinforcements such as single and hybrid form, coated and uncoated particles, and chemically treated particles on the thermal conductivity of various polymers are reviewed and the mechanism behind the improvement of the required properties are discussed. Furthermore, the role of manufacturing processes such as injection molding, compression molding, and 3D printing techniques in the production of high thermal conductivity polymer composites is detailed. Finally, the potential for future research is discussed, which can help researchers to work on the thermal properties enhancement for polymeric materials.

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“…Composites made from magnetocaloric powders embedded in a polymer or metal matrix have been recently proposed and developed to overcome the intrinsic brittleness of the bulk alloys [12,13]. In particular, the use of 3D printable composites in order to obtain complex geometries enhancing the multifunctional properties of MSMA is currently being actively explored [14,15].…”

Section: Introductionmentioning

confidence: 99%

Monitoring structural transformations in metamagnetic shape memory alloys by non-contact GMI technology

Beato-López,

La Roca,

Algueta-Miguel

et al. 2023

Smart Mater. Struct.

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Different applications based on Metamagnetic Shape Memory Alloy require monitoring the evolution of the martensitic transformation to optimize the actuation mechanism. To avoid interaction with the active material, a non-contact technique would be ideal. Nevertheless, non-contact detection involves complex methods like diffraction, optical analysis, or electromagnetic technology. The present work demonstrates that the martensitic transformation can be monitored without interaction with the active material using a low-cost technology based on the Giant Magnetoimpedance (GMI) effect. The GMI sensor is based on a (CoFe)SiB soft magnetic wire submitted to an alternating current and whose second harmonic voltage variation allows to detect changes in the strength of the stray magnetic fields linked to the metamagnetic phase transition. The sensor has been tested using the martensitic transformation of a NiMnInCo Metamagnetic Shape Memory Alloys. A specific application for environmental temperature control using the non-contact GMI sensor is proposed.

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Functional, thermal and rheological properties of polymer-based magnetic composite filaments for additive manufacturing

Cited by 17 publications

References 51 publications

Polymer‐based filaments with embedded magnetocaloric Ni‐Mn‐Ga Heusler alloy particles for additive manufacturing

Polymer‐based filaments with embedded magnetocaloric Ni‐Mn‐Ga Heusler alloy particles for additive manufacturing

High Thermal Conductivity Polymer Composites Fabrication through Conventional and 3D Printing Processes: State‐of‐the‐Art and Future Trends

Monitoring structural transformations in metamagnetic shape memory alloys by non-contact GMI technology

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