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Metals
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Amorphous Alloys — Properties, Modeling and Applications
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Amorphous Alloys — Properties, Modeling and Applications

A special issue of Metals (ISSN 2075-4701).

Deadline for manuscript submissions: closed (31 August 2019) | Viewed by 5664

Special Issue Editor

Prof. Dr. Michael Regev

E-Mail Website
Guest Editor
Department of Mechanical Engineering, Braude College of Engineering, Karmiel 2161401, Israel
Interests: metallurgy; magnesium alloys; amorphous alloys; friction stir welding and processing of Al, Cu, Mg and Ti alloys; high temperature mechanical properties; joining processes
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The search for new materials with improved properties never stops, as we all know. Amorphous alloys are among the new and promising material groups; these alloys have been attracting attention since their discovery in the 1960s. Contrary to crystalline materials, amorphous alloys lack crystallographic long-range order, and they are attractive due to their improved mechanical, electronic, magnetic, and chemical properties. Historically, amorphous alloys were first produced by rapid quenching methods, namely, cooling was carried out fast enough so that crystallization could not take place. Such a rapid cooling, of about 106 K·s−1, enabled the production of thin sections only. However, recent research yielded compositions that can be cooled at much slower rates and still result in an amorphous structure. In addition, an amorphous structure can be obtained also by other production techniques such as electrodeposition, solid state methods, mechanical milling, etc. These techniques, as well as composition modifications, make much larger sections possible to obtain.

It is my pleasure to invite you to submit a manuscript for this Special Issue. Full papers, communications, and reviews are all welcome.

Prof. Dr. Michael Regev
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

  • amorphous alloys
  • bulk metallic glass
  • melt spinning
  • electrodeposition
  • mechanical milling
  • solid state methods
  • deposition
  • mechanical properties
  • chemical properties

Published Papers (2 papers)

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Research

8 pages, 2119 KiB  
Article
Shear Punching of Amorphous Alloys under High-Frequency Vibrations
by Hongzhen Li, Yuqiang Yan, Fei Sun, Kangsen Li, Feng Luo and Jiang Ma
Metals 2019, 9(11), 1158; https://doi.org/10.3390/met9111158 - 28 Oct 2019
Cited by 12 | Viewed by 2854
Abstract
Although amorphous alloys possess many excellent properties, their practical application is limited due to the difficulty of plastic forming. In this work, an effective shear punching of amorphous alloys under high-frequency vibrations was proposed. Under the high-frequency vibration of the punch, the plastic [...] Read more.
Although amorphous alloys possess many excellent properties, their practical application is limited due to the difficulty of plastic forming. In this work, an effective shear punching of amorphous alloys under high-frequency vibrations was proposed. Under the high-frequency vibration of the punch, the plastic powder was melted into a flexible punch due to the frictional heat generation effect and the viscoelastic heat effect and continued to flow downward under the extrusion of the ultrasonic head to plastically deform the amorphous alloy ribbon. The disordered structure of the amorphous alloys helps them get soft in a localized region during high-frequency vibrations, which can result in low-stress deformations that are different from amorphous alloys in the conventional state. We manufactured various shapes with area of 5 mm2 using high-frequency vibrations and a molten plastic viscous medium. The molds were shaped into the letters “B”, “M”, and “G” and the Chinese characters “工” and “大”. The shapes were made from Fe-based, Al-based, La-based, and Cu-based amorphous alloys. Our results show that shear punching of amorphous alloys under high-frequency vibrations is an effective and low-cost production method of amorphous alloy, which also provides a basis for the wide application of amorphous alloy. Full article
(This article belongs to the Special Issue Amorphous Alloys — Properties, Modeling and Applications)
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12 pages, 3616 KiB  
Article
Effect of Ni Addition on Catalytic Performance of Fe87Si5B2P3Nb2Cu1 Amorphous Alloys for Degrading Methylene Blue Dyes
by Jinfang Shi, Bingying Ni, Jingjing Zhang, Chen Wu, Daowen Cheng, Yue Chi, Hongli Wang, Minggang Wang and Zhankui Zhao
Metals 2019, 9(3), 341; https://doi.org/10.3390/met9030341 - 18 Mar 2019
Cited by 8 | Viewed by 2278
Abstract
Fe-based amorphous alloys have shown great potential in degrading azo dyes and other organic pollutants. It has been widely investigated as a kind of environmentally friendly material for wastewater remediation. In this paper, we studied the effect of Ni addition on the catalytic [...] Read more.
Fe-based amorphous alloys have shown great potential in degrading azo dyes and other organic pollutants. It has been widely investigated as a kind of environmentally friendly material for wastewater remediation. In this paper, we studied the effect of Ni addition on the catalytic performance of Fe87Si5B2P3Nb2Cu1 amorphous alloy for degradation of methylene blue dyes and analyzed the reaction mechanism. (Fe87Si5B2P3Nb2Cu1)86Ni14 amorphous powder with desirable performance was produced by specific ball milling durations. Characterization of the Fe87Si5B2P3Nb2Cu1 and (Fe87Si5B2P3Nb2Cu1)86Ni14 amorphous alloys prepared by ball milling was performed by XRD and SEM. Fe87Si5B2P3Nb2Cu1 and (Fe87Si5B2P3Nb2Cu1)86Ni14 amorphous alloys were used as catalysts to catalyze the degradation of methylene blue dyes, which were detected by UV-VIS near-infrared spectrophotometer. By a series of comparative experiments, it was found that a catalyst dosage of 0.2 g and a reaction temperature of 80 °C were conditions that produced the best catalytic effect. The degradation rate of (Fe87Si5B2P3Nb2Cu1)86Ni14 amorphous alloy to methylene blue dyes prepared by ball milling increased from 67.76% to 99.99% compared with the Fe87Si5B2P3Nb2Cu1 amorphous alloy under the same conditions. Full article
(This article belongs to the Special Issue Amorphous Alloys — Properties, Modeling and Applications)
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