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Recent Advances in Multi-Functional Coatings for Soft Magnetic Composites

During the past 50 years, the aim to reduce the eddy current losses in magnetic cores to a minimum led to the formulation of new materials starting from electrically insulated iron powders, today called Soft Magnetic Composites (SMC). Nowadays, this promising branch of materials is still held back b...

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Autores principales: Pošković, Emir, Franchini, Fausto, Ferraris, Luca, Fracchia, Elisa, Bidulska, Jana, Carosio, Federico, Bidulsky, Robert, Actis Grande, Marco
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8623683/
https://www.ncbi.nlm.nih.gov/pubmed/34832247
http://dx.doi.org/10.3390/ma14226844
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author Pošković, Emir
Franchini, Fausto
Ferraris, Luca
Fracchia, Elisa
Bidulska, Jana
Carosio, Federico
Bidulsky, Robert
Actis Grande, Marco
author_facet Pošković, Emir
Franchini, Fausto
Ferraris, Luca
Fracchia, Elisa
Bidulska, Jana
Carosio, Federico
Bidulsky, Robert
Actis Grande, Marco
author_sort Pošković, Emir
collection PubMed
description During the past 50 years, the aim to reduce the eddy current losses in magnetic cores to a minimum led to the formulation of new materials starting from electrically insulated iron powders, today called Soft Magnetic Composites (SMC). Nowadays, this promising branch of materials is still held back by the mandatory tradeoff between energetic, electrical, magnetic, and mechanical performances. In most cases, the research activity focuses on the deposition of an insulating/binding layer, being one of the critical points in optimizing the final composite. This insulation usually is achieved by either inorganic or organic layer constituents. The main difference is the temperature limit since most inorganic materials typically withstand higher treatment temperatures. As a result, the literature shows many materials and process approaches, each one designed to meet a specific application. The present work summarizes the recent advances in state of the art, analyzing the relationship among material compositions and magnetic and mechanical properties. Each coating shows its own processing sets, which vary from simple mechanical mixing to advanced chemical methods to metallurgical treatments. From state of the art, Aluminum coatings are characterized by higher current losses and low mechanical properties. In contrast, higher mechanical properties are obtained by adopting Silicon coatings. The phosphates coatings show the best-balanced overall properties. Each coating type was thoroughly investigated and then compared with the literature background highlighting. The present paper thus represents a critical overview of the topic that could serve as a starting point for the design and development of new and high-performing coating solutions for SMCs. However, global research activity continuously refines the recipes, introducing new layer materials. The following steps and advances will determine whetherthese materials breakthrough in the market.
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spelling pubmed-86236832021-11-27 Recent Advances in Multi-Functional Coatings for Soft Magnetic Composites Pošković, Emir Franchini, Fausto Ferraris, Luca Fracchia, Elisa Bidulska, Jana Carosio, Federico Bidulsky, Robert Actis Grande, Marco Materials (Basel) Review During the past 50 years, the aim to reduce the eddy current losses in magnetic cores to a minimum led to the formulation of new materials starting from electrically insulated iron powders, today called Soft Magnetic Composites (SMC). Nowadays, this promising branch of materials is still held back by the mandatory tradeoff between energetic, electrical, magnetic, and mechanical performances. In most cases, the research activity focuses on the deposition of an insulating/binding layer, being one of the critical points in optimizing the final composite. This insulation usually is achieved by either inorganic or organic layer constituents. The main difference is the temperature limit since most inorganic materials typically withstand higher treatment temperatures. As a result, the literature shows many materials and process approaches, each one designed to meet a specific application. The present work summarizes the recent advances in state of the art, analyzing the relationship among material compositions and magnetic and mechanical properties. Each coating shows its own processing sets, which vary from simple mechanical mixing to advanced chemical methods to metallurgical treatments. From state of the art, Aluminum coatings are characterized by higher current losses and low mechanical properties. In contrast, higher mechanical properties are obtained by adopting Silicon coatings. The phosphates coatings show the best-balanced overall properties. Each coating type was thoroughly investigated and then compared with the literature background highlighting. The present paper thus represents a critical overview of the topic that could serve as a starting point for the design and development of new and high-performing coating solutions for SMCs. However, global research activity continuously refines the recipes, introducing new layer materials. The following steps and advances will determine whetherthese materials breakthrough in the market. MDPI 2021-11-12 /pmc/articles/PMC8623683/ /pubmed/34832247 http://dx.doi.org/10.3390/ma14226844 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Review
Pošković, Emir
Franchini, Fausto
Ferraris, Luca
Fracchia, Elisa
Bidulska, Jana
Carosio, Federico
Bidulsky, Robert
Actis Grande, Marco
Recent Advances in Multi-Functional Coatings for Soft Magnetic Composites
title Recent Advances in Multi-Functional Coatings for Soft Magnetic Composites
title_full Recent Advances in Multi-Functional Coatings for Soft Magnetic Composites
title_fullStr Recent Advances in Multi-Functional Coatings for Soft Magnetic Composites
title_full_unstemmed Recent Advances in Multi-Functional Coatings for Soft Magnetic Composites
title_short Recent Advances in Multi-Functional Coatings for Soft Magnetic Composites
title_sort recent advances in multi-functional coatings for soft magnetic composites
topic Review
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8623683/
https://www.ncbi.nlm.nih.gov/pubmed/34832247
http://dx.doi.org/10.3390/ma14226844
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