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Metallurgy of II-VI Groups Metals
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Metallurgy of II-VI Groups Metals

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Metals and Alloys".

Deadline for manuscript submissions: closed (20 August 2022) | Viewed by 3781

Special Issue Editor

Prof. Dr. Alexander A. Gromov

E-Mail Website
Guest Editor
MISIS Catalysis Laboratory, National University of Science and Technology MISIS, 119991 Moscow, Russia
Interests: additive manufacturing; metals; oxidation; combustion; powders
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Modern metallurgy of the metals of II-VI groups of Mendeleev Periodic Table in the 21st century has progressed significantly from the end of the 19th century, when the metallurgical processes of, for example, aluminum production was so expensive that the French Emperor Napoleon III ate off of aluminum plates, while the gold and silver ones were for his guests. At present, zero-emission aluminum production has been successfully tested by several large companies. However, a great deal of energy is still required for the metallurgy of metals in the II-VI groups of the Mendeleev Periodic Table. The trend toward energy-saving for this field is of primary importance. Another important problem is the simplification of the new fast and energy-saving methods for the production of high-tech devices made of II-VI metals: additive manufacturing for complex-shape articles, micron-sized and nanometal powders production, characterization, application, and modern powder metallurgy, new sintering and processing methods like additive manufacturing, spark plasma sintering, self-propagated high-temperature synthesis, mechanical alloying and mechanosynthesis, etc. The above-mentioned innovative metallurgy processes, including low-carbon and zero-emission processes, will be covered in this Special Issue. The problems associated with the treatment of secondary metals of II-VI groups are also of interest. The amount of accumulated metallic wastes on our planet has recently been determined to be on the order of a billion tons. Thus, the ecological aspects of their utilization and re-use require special attention and will be one of the topics for this Special Issue.

Prof. Dr. Alexander A. Gromov
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. Materials is an international peer-reviewed open access semimonthly 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

  • II-VI metals
  • light metals
  • metallurgy
  • metal wastes
  • SPS
  • SHS
  • metallic wastes

Published Papers (2 papers)

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Research

19 pages, 12463 KiB  
Article
Hydrogen Recovery from Waste Aluminum–Plastic Composites Treated with Alkaline Solution
by Olesya A. Buryakovskaya and Mikhail S. Vlaskin
Materials 2022, 15(23), 8699; https://doi.org/10.3390/ma15238699 - 06 Dec 2022
Cited by 4 | Viewed by 2215
Abstract
An alternative solution to the problem of aluminum–plastic multilayer waste utilization was suggested. The process can be used for hydrogen generation and layer separation. Three different sorts of aluminum–plastic sandwich materials were treated with an alkali solution. In the temperature range of 50–70 [...] Read more.
An alternative solution to the problem of aluminum–plastic multilayer waste utilization was suggested. The process can be used for hydrogen generation and layer separation. Three different sorts of aluminum–plastic sandwich materials were treated with an alkali solution. In the temperature range of 50–70 °C, for tablet blisters of polyvinylchloride and aluminum (14.8 wt.%), the latter thoroughly reacted in 15–30 min. For sheets of paper, polyethylene, and aluminum (20 wt.%), full hydrogen ‘recovery’ from reacted aluminum component took 3–8 min. From the lids of polyethylene terephthalate, aluminum (60 wt.%), and painted polyethylene with perforations, the aluminum was consumed after 45–105 min. The effect of perforations was the reduction of the process duration from nearly 90 min for the lids with no perforations to nearly 45 min for the perforated ones (at 70 °C). Perforations provided better contact between the aluminum foil, isolated between the plastic layers, and the alkali solution. Hydrogen bubbles originating near those perforations provided foil separation from the upper painted plastic layer by creating gas gaps between them. The remaining components of the composite multilayer materials were separated and ready for further recycling. Full article
(This article belongs to the Special Issue Metallurgy of II-VI Groups Metals)
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27 pages, 8052 KiB  
Article
Microstructural Transformation and Hydrogen Generation Performance of Magnesium Scrap Ball Milled with Devarda’s Alloy
by Olesya A. Buryakovskaya and Mikhail S. Vlaskin
Materials 2022, 15(22), 8058; https://doi.org/10.3390/ma15228058 - 15 Nov 2022
Cited by 4 | Viewed by 1198
Abstract
A method for magnesium scrap transformation into highly efficient hydroreactive material was elaborated. Tested samples were manufactured of magnesium scrap with no additives, or 5 and 10 wt.% Devarda’s alloy, by ball milling for 0.5, 1, 2, and 4 h. Their microstructural evolution [...] Read more.
A method for magnesium scrap transformation into highly efficient hydroreactive material was elaborated. Tested samples were manufactured of magnesium scrap with no additives, or 5 and 10 wt.% Devarda’s alloy, by ball milling for 0.5, 1, 2, and 4 h. Their microstructural evolution and reaction kinetics in 3.5 wt.% NaCl solution were investigated. For the samples with additives and of scrap only, microstructural evolution included the formation of large plane-shaped pieces (0.5 and 1 h) with their further transformation into small compacted solid-shaped objects (2 and 4 h), along with accumulation of crystal lattice imperfections favoring pitting corrosion, and magnesium oxidation with residual oxygen under prolonged (4 h) ball milling, resulting in the lowest reactions rates. Modification with Devarda’s alloy accelerated microstructural evolution (during 0.5–1 h) and the creation of ‘microgalvanic cells’, enhancing magnesium galvanic corrosion with hydrogen evolution. The 1 h milled samples, with 5 wt.% Devarda’s alloy and without additives, provided the highest hydrogen yields of (95.36 ± 0.38)% and (91.12 ± 1.19)%; maximum reaction rates achieved 470.9 and 143.4 mL/g/min, respectively. Such high results were explained by the combination of the largest specific surface areas, accumulated lattice imperfections, and ‘microgalvanic cells’ (from additive). The optimal values were 1 h of milling and 5 wt.% of additive. Full article
(This article belongs to the Special Issue Metallurgy of II-VI Groups Metals)
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