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:	Emir Pošković, Fausto Franchini, Luca Ferraris, Elisa Fracchia, Jana Bidulska, Federico Carosio, Robert Bidulsky, Marco Actis Grande
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	powder metallurgy Soft Magnetic Composite (SMC) organic and inorganic layers metal oxides resins iron losses Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
Acceso en línea:	https://doaj.org/article/95111d7902434178a8abfec07fa107ab
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spelling	oai:doaj.org-article:95111d7902434178a8abfec07fa107ab2021-11-25T18:14:04ZRecent Advances in Multi-Functional Coatings for Soft Magnetic Composites10.3390/ma142268441996-1944https://doaj.org/article/95111d7902434178a8abfec07fa107ab2021-11-01T00:00:00Zhttps://www.mdpi.com/1996-1944/14/22/6844https://doaj.org/toc/1996-1944During 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.Emir PoškovićFausto FranchiniLuca FerrarisElisa FracchiaJana BidulskaFederico CarosioRobert BidulskyMarco Actis GrandeMDPI AGarticlepowder metallurgySoft Magnetic Composite (SMC)organic and inorganic layersmetal oxidesresinsiron lossesTechnologyTElectrical engineering. Electronics. Nuclear engineeringTK1-9971Engineering (General). Civil engineering (General)TA1-2040MicroscopyQH201-278.5Descriptive and experimental mechanicsQC120-168.85ENMaterials, Vol 14, Iss 6844, p 6844 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	powder metallurgy Soft Magnetic Composite (SMC) organic and inorganic layers metal oxides resins iron losses Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
spellingShingle	powder metallurgy Soft Magnetic Composite (SMC) organic and inorganic layers metal oxides resins iron losses Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85 Emir Pošković Fausto Franchini Luca Ferraris Elisa Fracchia Jana Bidulska Federico Carosio Robert Bidulsky Marco Actis Grande Recent Advances in Multi-Functional Coatings for Soft Magnetic Composites
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.
format	article
author	Emir Pošković Fausto Franchini Luca Ferraris Elisa Fracchia Jana Bidulska Federico Carosio Robert Bidulsky Marco Actis Grande
author_facet	Emir Pošković Fausto Franchini Luca Ferraris Elisa Fracchia Jana Bidulska Federico Carosio Robert Bidulsky Marco Actis Grande
author_sort	Emir Pošković
title	Recent Advances in Multi-Functional Coatings for Soft Magnetic Composites
title_short	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_sort	recent advances in multi-functional coatings for soft magnetic composites
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/95111d7902434178a8abfec07fa107ab
work_keys_str_mv	AT emirposkovic recentadvancesinmultifunctionalcoatingsforsoftmagneticcomposites AT faustofranchini recentadvancesinmultifunctionalcoatingsforsoftmagneticcomposites AT lucaferraris recentadvancesinmultifunctionalcoatingsforsoftmagneticcomposites AT elisafracchia recentadvancesinmultifunctionalcoatingsforsoftmagneticcomposites AT janabidulska recentadvancesinmultifunctionalcoatingsforsoftmagneticcomposites AT federicocarosio recentadvancesinmultifunctionalcoatingsforsoftmagneticcomposites AT robertbidulsky recentadvancesinmultifunctionalcoatingsforsoftmagneticcomposites AT marcoactisgrande recentadvancesinmultifunctionalcoatingsforsoftmagneticcomposites
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Recent Advances in Multi-Functional Coatings for Soft Magnetic Composites

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