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Synthesis, Characterization and Properties of Multifunctional Metallic Materials and Metal-Based...
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Synthesis, Characterization and Properties of Multifunctional Metallic Materials and Metal-Based Composites

A special issue of Metals (ISSN 2075-4701). This special issue belongs to the section "Metal Matrix Composites".

Deadline for manuscript submissions: closed (5 August 2022) | Viewed by 6352

Special Issue Editor

Dr. Sofiya Aydinyan

E-Mail Website
Guest Editor
Department of Industrial and Mechanical Engineering, Tallinn University of Technology, Ehitajate 5, 19086 Tallinn, Estonia
Interests: combustion synthesis (CS) of nanomaterials; bio-inspired ceramics; catalytic systems; biomaterials; metals; high-entropy materials; pseudoalloys; characterization by X-ray diffraction; scanning electron microscope; gas chromatography; chemical, atomic absorption, and thermal analysis methods; spark plasma sintering and selective laser melting/sintering of metals, ceramics, and cermets
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

It is my great pleasure to invite you to submit a manuscript to the forthcoming Special Issue, “Synthesis, Characterization and Properties of Multifunctional Metallic Materials and Metal-Based Composites”, of the journal Metals.

With the continuous upsurge in technological advances and global market demand, multifunctional metallic materials and metal-based composites are being increasingly required to operate under extreme environmental conditions as well as in multipurpose (catalytic, magnetic, electric, and shape-memory) applications. Although multifunctional metallic materials are always at the technological forefront, traditional efforts, however, have limited capabilities to address current issues, which are focused on both industrial and scientific drivers.

New ways of designing metallic materials and metal-based composites have already highlighted the potential of hybrid materials, with a length scale defined by their inner architecture (so-called architected materials). The search for solutions to meet the challenging requirements for the development of architected metal-based composites of combined specifications has the potential to ensure meeting predefined industrial needs. Multifunctional metallic materials and metal-based composites often exhibit a combination of unusual properties, leading to emerging yet exciting new fields for boundless exploration. The spectacular field of multifunctional metallic materials for multipurpose applications in hydrogen storage, radiation resistance, diffusion barriers for electronics, precision resistors, electromagnetic shielding, soft magnetic, thermoelectrics, functional coatings, etc., as well as the evolution of microstructure, its defects, and the mechanical and physical properties of the produced materials are the topics of particular interest for this Special issue. The generation of new knowledge and discussion of new ways for metal and metal-based materials development, control of material quality, and process simulation are the main motivations of the current issue.

Dr. Sofiya Aydinyan
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

  • multifunctional metallic materials
  • metal-based composites
  • architected metallic materials
  • hybrid materials
  • physical and mechanical properties
  • shape-memory alloys
  • high-entropy alloys

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Published Papers (3 papers)

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Research

12 pages, 4808 KiB  
Article
Kinetic Highlights of the Reduction of Silver Tungstate by Mg + C Combined Reducer
by Marieta Zakaryan, Khachik Nazaretyan, Sofiya Aydinyan and Suren Kharatyan
Metals 2022, 12(6), 1000; https://doi.org/10.3390/met12061000 - 10 Jun 2022
Viewed by 1799
Abstract
The programmed reduction of tungstates and molybdates may yield the production of an intimate mixture of metals, pseudo-alloys or composite powders. As an extension of the study of obtaining powders of tungsten-copper, molybdenum-copper and tungsten-nickel from their respective salts, in the present study [...] Read more.
The programmed reduction of tungstates and molybdates may yield the production of an intimate mixture of metals, pseudo-alloys or composite powders. As an extension of the study of obtaining powders of tungsten-copper, molybdenum-copper and tungsten-nickel from their respective salts, in the present study the reduction of silver tungstate was performed. Considering the extreme conditions for the synthesis of W-Ag alloys in the combustion wave and the limited toolkit for the study of the associated reduction mechanism, the interaction in the Ag2WO4-Mg-C system was modeled at high heating rates closer to the heating rates of reagents in the combustion wave, namely by the high-speed temperature scanner (HSTS). For the effective study of the interaction mechanism and calculation of the kinetic parameters of the individual stages, the heating rate of the reagents was changed in a wide range (from 100 to 1200 °C min−1). The interaction scheme and the sequence of the reactions along with their starting temperatures were deduced; the nature of intermediates formed during the reduction process and the microstructure evolution were monitored. Full article
(This article belongs to the Special Issue Synthesis, Characterization and Properties of Multifunctional Metallic Materials and Metal-Based Composites)
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15 pages, 9077 KiB  
Article
The Interaction Pathway in the Mechano-Ultrasonically Assisted and Carbon-Nanotubes Augmented Nickel–Aluminum System
by Khachik Nazaretyan, Hasmik Kirakosyan, Marieta Zakaryan, Larisa Abovyan, Olga Volobujeva and Sofiya Aydinyan
Metals 2022, 12(3), 436; https://doi.org/10.3390/met12030436 - 1 Mar 2022
Cited by 2 | Viewed by 2261
Abstract
The influence of mechano-ultrasonic activation (MUA) and nano-additives (carbon nanotubes-CNT) on the interaction pathway of nickel–aluminum powder mixture at high heating rates was investigated. The optimum conditions of the mechano-ultrasonic activation, along with the phase and structure formation peculiarities of nickel–aluminum and nickel–aluminum–carbon [...] Read more.
The influence of mechano-ultrasonic activation (MUA) and nano-additives (carbon nanotubes-CNT) on the interaction pathway of nickel–aluminum powder mixture at high heating rates was investigated. The optimum conditions of the mechano-ultrasonic activation, along with the phase and structure formation peculiarities of nickel–aluminum and nickel–aluminum–carbon nanotubes mixtures by thermal analysis method, the so-called high-speed temperature scanner (HSTS), were found out. The optimum duration of mechanical and ultrasonic activation aiming to achieve homogeneous distribution in the agitated mixtures was determined. A shift in characteristic temperatures of MUA mixtures by the influence of both heating rate and ultrasound on the Ni + Al interaction pathway for the mechano-activated (1, 3, 5 min) and 1 wt% CNT containing mixtures was observed. The formation patterns of NiAl + Ni3Al mixture or pure NiAl phase was manifested according to the interaction mechanism (depending on solid–liquid or solid–solid state of intermediates). The effective activation energy values for the Ni + Al exothermic reactions of all studied systems were determined by the isoconversional method of Kissinger. Full article
(This article belongs to the Special Issue Synthesis, Characterization and Properties of Multifunctional Metallic Materials and Metal-Based Composites)
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13 pages, 4022 KiB  
Article
Joint Reduction of NiO/WO3 Pair and NiWO4 by Mg + C Combined Reducer at High Heating Rates
by Marieta Zakaryan, Khachik Nazaretyan, Sofiya Aydinyan and Suren Kharatyan
Metals 2021, 11(9), 1351; https://doi.org/10.3390/met11091351 - 27 Aug 2021
Cited by 7 | Viewed by 1767
Abstract
Functional features of Ni-W composite materials combined with successful performance enabled a breakthrough in their broad application. To disclose the formation pathway of Ni-W composite materials at extreme conditions of combustion synthesis in the NiO-WO3-Mg-C and NiWO4-Mg-C systems for [...] Read more.
Functional features of Ni-W composite materials combined with successful performance enabled a breakthrough in their broad application. To disclose the formation pathway of Ni-W composite materials at extreme conditions of combustion synthesis in the NiO-WO3-Mg-C and NiWO4-Mg-C systems for the optimization of the synthesis procedure, the process was modeled under programmed linear heating conditions by thermal analysis methods. The reduction kinetics of tungsten and nickel oxides mixture and nickel tungstate by Mg + C combined reducer at non-isothermal conditions was studied at high heating rates (100–1200 °C min−1) by high-speed temperature scanner techniques. It was shown that when moving from low heating to high heating rates, the mechanism of both the magnesiothermic and magnesio-carbothermic reductions of the initial mixtures changes; that is, the transition from a solid-solid scheme to a solid-liquid scheme is observed. The strong influence of the heating rate on the reduction degree and kinetic parameters of the systems under study was affirmed. The simultaneous utilization of magnesium and carbon as reducers allowed the lowering of the starting and maximum temperatures of reduction processes, as evidenced by the synergetic effect at the utilization of a combined reducer. The effective values of activation energy (Ea) for the reactions proceeding in the mixtures NiO + WO3 + 4Mg, NiO + WO3 + 2.5Mg + 1.5C, NiWO4 + 4Mg and NiWO4 + 2Mg + 2C were estimated by Kissinger isoconversional method and were 146 ± 10, 141 ± 10, 216 ± 15 and 148 ± 15 kJ mol−1, respectively. Full article
(This article belongs to the Special Issue Synthesis, Characterization and Properties of Multifunctional Metallic Materials and Metal-Based Composites)
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