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Metals
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Soft Magnetic Alloys and Composites
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Soft Magnetic Alloys and Composites

A special issue of Metals (ISSN 2075-4701). This special issue belongs to the section "Entropic Alloys and Meta-Metals".

Deadline for manuscript submissions: closed (30 April 2022) | Viewed by 4614

Special Issue Editor

Prof. Dr. Joan-Josep Suñol

E-Mail Website
Guest Editor
Department of Physics, University of Girona, Campus Montilivi s/n, 17003 Girona, Spain
Interests: Powder Metallurgy; Structural Analysis; Thermal Analysis; Mechanical Alloying; Nanocrystalline
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Interest in soft magnetic alloys and composites is due to their many applications, as well as the possibility of obtaining materials with the desired magnetic properties by controlling the processing conditions and the microstructure. Soft magnetic alloys and composites will play an important role to improve the energy efficiency of energy conversion devices. They are mostly amorphous or nanocrystalline Fe-, Co-, and/or Ni-based compounds. Among the magnetic properties to be optimized, it is worth highlighting the magnetization of saturation, coercivity, remanence, magneto-impedance, saturation polarization, magneto-crystalline anisotropy, and losses, in addition to other properties, such as resistance to corrosion and resistivity. There are multiple aspects that need to be analyzed, such as the nanomagnetism, the influence of heat/stress/field treatments, and the addition of minor elements. Regarding composites, apart from the traditional polymer-based ones, there are also soft–hard composites for the optimization of permanent magnets, or those obtained by means of innovative additive manufacturing techniques. Their applications are also diverse, franging from materials for a sustainable and electrified world, to sensors and actuators, catalysis, and magnetocaloric effects. Likewise, theoretical or simulation studies are also well-valued topics.

Prof. Dr. Joan-Josep Suñol
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Metals is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • soft magnetic
  • composites
  • nanomagnetism
  • sensors
  • energy efficiency
  • energy conversion

Published Papers (2 papers)

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Research

10 pages, 4928 KiB  
Article
Influence of Sintering Temperature on the Structural, Morphological, and Electrochemical Properties of NiO-YSZ Anode Synthesized by the Autocombustion Route
by Muneeb Irshad, Muhammad Rafique, Asif Nadeem Tabish, Abdul Ghaffar, Ahmad Shakeel, Khurram Siraj, Qurat ul Ain, Rizwan Raza, Mohammed Ali Assiri and Muhammad Imran
Metals 2022, 12(2), 219; https://doi.org/10.3390/met12020219 - 24 Jan 2022
Cited by 3 | Viewed by 2519
Abstract
In this study, nickel oxide–Y2O3-doped ZrO2 (NiO-YSZ) composite powder as an anode material was synthesized using a cost-effective combustion method for high-temperature solid oxide fuel cell (SOFC). Further, the effects of sintering temperatures (1200, 1300, and 1400 °C) [...] Read more.
In this study, nickel oxide–Y2O3-doped ZrO2 (NiO-YSZ) composite powder as an anode material was synthesized using a cost-effective combustion method for high-temperature solid oxide fuel cell (SOFC). Further, the effects of sintering temperatures (1200, 1300, and 1400 °C) were studied for its properties in relation to the SOFC performance. The prepared and sintered NiO-YSZ materials were characterized for their surface morphology, composition, structure, and conductivity. The cubic crystalline nature of NiO and YSZ was sufficed by X-ray diffraction, and SEM images revealed an increase in the densification of microstructure by an increase in the sintering temperature. EDX spectrum confirmed the presence of nickel, yttrium, and zirconia without any impurity. Conductivity measurements, under a hydrogen environment, revealed that NiO-YSZ, sintered at 1400 °C, exhibits better conductivity compared to the samples sintered at lower temperatures. Electrochemical performance of button-cells was also evaluated and peak power density of 0.62 Wcm−2 is observed at 800 °C. The citrate combustion method provided peak performance for cells containing anode sintered at 1200 °C, which was previously reported at higher sintering temperatures. Therefore, the citrate combustion method is found to be a suitable route to synthesize NiO-YSZ at low sintering temperature. Full article
(This article belongs to the Special Issue Soft Magnetic Alloys and Composites)
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11 pages, 6162 KiB  
Article
Characterization and Analysis of Nanocrystalline Soft Magnetic Alloys: Fe Based
by Jason Daza, Wael Ben Mbarek, Lluisa Escoda and Joan-Josep Suñol
Metals 2021, 11(12), 1896; https://doi.org/10.3390/met11121896 - 25 Nov 2021
Cited by 3 | Viewed by 1391
Abstract
Soft magnetic nanocrystalline alloys have been widely analysed and studied during the past years. However, optimisation of specific chemical compositions is still being developed. The applicability of these soft nanocrystalline alloys depends mainly on the presence of the desired nanocrystalline phases within the [...] Read more.
Soft magnetic nanocrystalline alloys have been widely analysed and studied during the past years. However, optimisation of specific chemical compositions is still being developed. The applicability of these soft nanocrystalline alloys depends mainly on the presence of the desired nanocrystalline phases within the alloy. In this study, the analysed alloys are manufactured by mechanical alloying. The analyses performed on the samples include a microstructural analysis, a thermal analysis, and a complementary functional analysis in the form of the thermomagnetic response of some samples. Regarding Fe-based alloys, thermal stability for samples containing B was higher than those containing P (crystal growth peaks in the range between 895–905 K and 775–800 K respectively). The higher magnetization of saturation, Ms, was found in Fe–Mn alloys, whereas the addition of boron provoked a decrease of Ms and the nanocrystals size. Full article
(This article belongs to the Special Issue Soft Magnetic Alloys and Composites)
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