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Crystals
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Magnesium-Based Alloys with Rare Earth Elements
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Magnesium-Based Alloys with Rare Earth Elements

A special issue of Crystals (ISSN 2073-4352). This special issue belongs to the section "Crystalline Metals and Alloys".

Deadline for manuscript submissions: closed (31 December 2023) | Viewed by 1182

Special Issue Editor

Dr. Kai Guan

E-Mail Website
Guest Editor
School of Materials Science and Engineering, Jilin University, Changchun, China
Interests: metals; Mg alloys; rare earth elements; microstructure characterization; mechanical property
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Magnesium alloys can be used in a wide range of applications, from lightweight construction to biomaterials. However, the low strength and poor heat and corrosion resistance of common magnesium alloys are still bottlenecks restricting the large-scale application of magnesium alloys. Rare earth elements generally provide good strengthening effects, aging resistance effects and grain refinement effects, which can greatly improve the high-temperature strength and creep resistance of magnesium alloys.

This Special Issue of Materials seeks to highlight recent successes and developments in magnesium-based alloys. The focus of this Special Issue is the relationship between the processing and properties of magnesium alloys containing rare earth elements. Contributions are intended to show the influence of the manufacturing process, e.g., casting, extrusion, heat treatment, and processing parameters, e.g., temperature, time, cooling, on the property profile of these alloys. This encompasses microstructural developments such as changes in grain size or texture, as well as mechanical properties, but also corrosion properties for mechanical engineering applications. Manuscripts dealing with the fabrication of magnesium-based materials with rare earth elements, including alloys, composites and coatings, as well as their microstructure, multifunctional properties, and design, are welcome. It is our pleasure to invite all contributions covering these topics in their entirety.

Dr. Kai Guan
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at mdpi.longhoe.net 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. Crystals 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 2100 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

  • mechanical properties
  • magnesium
  • microstructure evolution
  • alloy development
  • rare earth elements
  • additive manufacturing

Published Papers (1 paper)

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Research

10 pages, 19571 KiB  
Article
{Ca, Eu, Yb}23Cu7Mg4 as a Step towards the Structural Generalization of Rare Earth-Rich Intermetallics
by Pavlo Solokha, Riccardo Freccero and Serena De Negri
Crystals 2024, 14(2), 156; https://doi.org/10.3390/cryst14020156 - 31 Jan 2024
Cited by 1 | Viewed by 911
Abstract
The R23Cu7Mg4 (R = Ca, Eu) intermetallics, studied by single-crystal X-ray diffraction, were found to be isostructural with the Yb23Cu7Mg4 prototype (hP68, k4h2fca, space group [...] Read more.
The R23Cu7Mg4 (R = Ca, Eu) intermetallics, studied by single-crystal X-ray diffraction, were found to be isostructural with the Yb23Cu7Mg4 prototype (hP68, k4h2fca, space group P63/mmc), forming a small group inside the bigger 23:7:4 family, otherwise adopting the hP68-Pr23Ir7Mg4 crystal structure. The observed structural peculiarity is connected with the divalent character of the R component and with a noticeable volume contraction, resulting in the clear clustering of title compounds inside the whole 23:7:4 family. The occurrence of fragments typical of similar compounds, particularly Cu-centered trigonal prisms and Mg-centered core–shell polyicosahedral clusters with R at vertices, induced the search of significant structural relationships. In this work, a description of the hexagonal crystal structure of the studied compounds is proposed as a linear intergrowth along the c-direction of the two types of slabs, R10CuMg3 (parent type: hP28-kh2ca, SG 194) and R13Cu6Mg (parent type: hR60-b6a2, SG 160). The ratio of these slabs in the studied structure is 2:2 per unit cell, corresponding to the simple equation, 2 × R10CuMg3 + 2 × R13Cu6Mg = 2 × R23Cu7Mg4. This description assimilates the studied compounds to the {Ca, Eu, Yb}4CuMg ones, where the same slabs (of p3m1 layer symmetry) are stacked in a different way/ratio and constitutes a further step towards a structural generalization of R-rich ternary intermetallics. Full article
(This article belongs to the Special Issue Magnesium-Based Alloys with Rare Earth Elements)
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