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Advances in Amorphous Alloy
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Advances in Amorphous Alloy

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

Deadline for manuscript submissions: closed (15 December 2024) | Viewed by 9268

Special Issue Editor

Prof. Dr. Lei Xia

E-Mail Website
Guest Editor
Institute of Materials, Shanghai University, Shanghai 200072, China
Interests: amorphous alloy; glass forming ability; physical properties; microstructure

Special Issue Information

Dear Colleagues,

Amorphous alloys, as a kind of material without long-range ordered atomic configuration, have attracted intensive interests in the last several decades because of their outstanding physical, chemical and mechanical properties. The development of new amorphous alloy systems and the investigation of their unique properties are still at the cutting edge of metastable metallic alloys and condensed matter physics because of the potential merits in both the fundamental studies and commercial application perspectives in military, aerospace, biomedicine, sporting goods, electric power industry, and so on.

This Special Issue aims to present the latest advances in amorphous alloys, including the glass-forming ability; mechanical, physical and chemical properties of the metallic glasses; microstructure and its relationship to the properties; deformation behavior and the mechanism involved; application of amorphous structural/functional materials; and other related items of the amorphous alloys. Based on your scientific reputation and research interests, I am pleased to invite you to submit a manuscript for this Special Issue. Articles, reviews and communications are all welcome.

Prof. Dr. Lei Xia
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

  • metallic glass
  • amorphous alloy
  • glass-forming ability
  • mechanical properties
  • physical properties
  • chemical properties
  • microstructure
  • cluster
  • phase evolution
  • shear band
  • magnetocaloric effect
  • magnetostriction

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Published Papers (6 papers)

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Research

11 pages, 10097 KiB  
Article
Centrifugal Atomization and Characterization of Fe-Si-B Amorphous Alloys
by Sasha A. Cegarra, Héctor Maicas and Jordi Pijuan
Materials 2025, 18(3), 510; https://doi.org/10.3390/ma18030510 - 23 Jan 2025
Viewed by 622
Abstract
The centrifugal atomization process is a rapid solidification method that achieves high cooling rates. Although this technique is typically used to produce common metal powders, it has not been extensively explored for amorphous powder production, despite its clear advantage of generating nearly perfect [...] Read more.
The centrifugal atomization process is a rapid solidification method that achieves high cooling rates. Although this technique is typically used to produce common metal powders, it has not been extensively explored for amorphous powder production, despite its clear advantage of generating nearly perfect spherical particles, which is beneficial for subsequent powder consolidation. In this paper, a characterization of three iron-based alloys from the Fe-Si-B system, specifically Fe91.72Si5.32B2.96 (wt%), Fe87.37Si6.94B2.49Cr2.46C0.75 (wt%), and Fe89.41Si2.02B1.13P5.89C1.55 (wt%), produced by centrifugal atomization, is presented. The amorphous fractions of the powders were quantified using DSC, with further characterization performed via optical microscopy, SEM, and XRD. The amorphous fractions increased with the addition of Cr, C, and P, reaching up to 90% in the Fe89.41Si2.02B1.13P5.89C1.55 alloy for particles of <100 μm. The onset cooling rates were estimated to be approximately 10⁶ K/s for Fe91.7Si5.32B3, 10⁵ K/s for Fe87.36Si6.9B2.48Cr2.45C0.75, and 10⁴ K/s for Fe89.41Si2.02B1.13P5.89C1.55, respectively. Full article
(This article belongs to the Special Issue Advances in Amorphous Alloy)
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13 pages, 7180 KiB  
Article
Mechanism for Improved Curie Temperature and Magnetic Entropy Change in Sm-Doped Fe88Zr8B4 Amorphous Alloys
by Zhe-Rui Zhang, Xiang-Jie Liu, He-Teng Zhang, Qiang Wang, Ding Ding, Ben-Zhen Tang, Peng Yu, Jin-Lei Yao and Lei Xia
Materials 2023, 16(23), 7274; https://doi.org/10.3390/ma16237274 - 22 Nov 2023
Cited by 2 | Viewed by 1199
Abstract
In the present work, Fe88Zr8−xSmxB4 (x = 2, 4) amorphous alloys (AAs) were successfully synthesized into the shape of 40-micrometer-thick ribbons and their magnetic properties were measured. The Fe88Zr8−xSmxB4 [...] Read more.
In the present work, Fe88Zr8−xSmxB4 (x = 2, 4) amorphous alloys (AAs) were successfully synthesized into the shape of 40-micrometer-thick ribbons and their magnetic properties were measured. The Fe88Zr8−xSmxB4 (x = 2, 4) AAs exhibited a rather high maximum magnetic entropy change (−ΔSmpeak): ~3.53 J/(K × kg) near 317 K for x = 2 and ~3.79 J/(K × kg) near 348 K for x = 4 under 5 T. The effects of a Sm substitution for Zr on the Curie temperature (Tc) and −ΔSmpeak were studied and compared to those of Nd and Pr substitutions, for the purpose of revealing the mechanism involved in more detail. Full article
(This article belongs to the Special Issue Advances in Amorphous Alloy)
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11 pages, 5439 KiB  
Article
Tailoring Mechanical and Magnetic Properties in Dual-Phase FeCoNi(CuAl)0.8 High-Entropy Alloy
by Xiaohua Tan, Lingmiao Chen, Mengxin Lv, Wenfeng Peng and Hui Xu
Materials 2023, 16(22), 7222; https://doi.org/10.3390/ma16227222 - 18 Nov 2023
Cited by 3 | Viewed by 1561
Abstract
For tailoring the mechanical and magnetic properties of dual-phase high-entropy alloys (HEAs), it is crucial to understand the effect of each phase on the overall properties. In this paper, the effects of individual FCC and BCC phases on the mechanical and magnetic properties [...] Read more.
For tailoring the mechanical and magnetic properties of dual-phase high-entropy alloys (HEAs), it is crucial to understand the effect of each phase on the overall properties. In this paper, the effects of individual FCC and BCC phases on the mechanical and magnetic properties of the FeCoNi(CuAl)0.8 HEA are investigated by nanoindentation and first-principles calculations. The nano-hardness of the BCC phase is 8.73 GPa, which is nearly double the 4.60 GPa of the FCC phase, which ascribes to spherical nanoprecipitates that are only observed in the BCC phase leading to precipitation hardening. First-principles calculations on the electronic structure show that calculated saturation magnetization (Ms) of the BCC phase is 0.81 T, higher than 0.77 T of the FCC phase. An approximate yield strength and Ms can be estimated by summing the volume-fraction-weighted contributions from each phase, and are in good agreement with experimental values. It indicates that the overall mechanical and magnetic properties of the dual-phase HEAs can be tailored by tuning the volume fraction of the individual phase. Our findings are helpful to design prospective dual-phase HEAs with both good mechanical properties and soft magnetic performance by adjusting the content of each phase. Full article
(This article belongs to the Special Issue Advances in Amorphous Alloy)
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10 pages, 5198 KiB  
Article
The Effect of Fe Addition on the Curie Temperature and Magnetic Entropy of the Gd45Co50Al5 Amorphous Alloy
by Luyi Li, Benzhen Tang, Weijie Fu, Ying Lu, Yunqing Fu, Ding Ding, Lei Xia and Peng Yu
Materials 2023, 16(13), 4571; https://doi.org/10.3390/ma16134571 - 24 Jun 2023
Cited by 1 | Viewed by 1451
Abstract
The new magnetic refrigeration (MR) technology, which uses the magnetocaloric effect (MCE) of materials for refrigeration, has shown apparent advantages over the compression refrigeration of freon and other gases. Therefore, how to obtain materials with excellent magnetic entropy change near room temperature is [...] Read more.
The new magnetic refrigeration (MR) technology, which uses the magnetocaloric effect (MCE) of materials for refrigeration, has shown apparent advantages over the compression refrigeration of freon and other gases. Therefore, how to obtain materials with excellent magnetic entropy change near room temperature is of great significance for the realization of MR. In order to achieve high Tc of a Gd-based amorphous alloy, Gd45Co50Al5 amorphous alloy with good room temperature MCE was selected, and a series of Gd45Co50−xFexAl5 (x = 2, 5, 10) amorphous alloys were prepared by adding Fe instead of Co. In this paper, the effect of Fe addition on the Curie temperature, and the magnetic entropy change in the alloys, were studied thoroughly. The results show that the Curie temperature is increased to 281 K by adding 5% Fe elements, which is mainly related to the enhanced 3d-3d interaction of transition elements caused by Fe addition, and the maximum value of magnetic entropy change is 3.24 J/(kg·K) under a field of 5 T. The results are expected to provide guidance for further improving the room temperature MCE of Gd-based amorphous alloys. Full article
(This article belongs to the Special Issue Advances in Amorphous Alloy)
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9 pages, 1975 KiB  
Article
Excellent Magnetocaloric Performance of the Fe87Ce13−xBx (x = 5, 6, 7) Metallic Glasses and Their Composite
by Shu-Hui Zheng, Qiang Wang, Li-Ze Zhu, Peng-Jie Wang, Ding Ding, Ben-Zhen Tang, Peng Yu, Jin-Lei Yao and Lei Xia
Materials 2023, 16(12), 4393; https://doi.org/10.3390/ma16124393 - 14 Jun 2023
Cited by 5 | Viewed by 1662
Abstract
The novel Fe87Ce13−xBx (x = 5, 6, 7) metallic glass (MG) ribbons were fabricated in this work. The compositional dependence of glass forming ability (GFA), magnetic and magnetocaloric properties of these ternary MGs, and the mechanism involved was [...] Read more.
The novel Fe87Ce13−xBx (x = 5, 6, 7) metallic glass (MG) ribbons were fabricated in this work. The compositional dependence of glass forming ability (GFA), magnetic and magnetocaloric properties of these ternary MGs, and the mechanism involved was investigated. The GFA and Curie temperature (Tc) of the MG ribbons were found to improve with the boron content, and the peak value of magnetic entropy change (−ΔSmpeak) reaches a maximum of 3.88 J/(kg × K) under 5 T when x = 6. Based on the three results, we designed an amorphous composite that exhibits a table-shape magnetic entropy change (−ΔSm) profile with a rather high average −ΔSm (−ΔSmaverage~3.29 J/(kg × K) under 5 T) from 282.5 K to 320 K, which makes it a potential candidate for the highly efficient refrigerant in a domestic magnetic refrigeration appliance. Full article
(This article belongs to the Special Issue Advances in Amorphous Alloy)
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15 pages, 2498 KiB  
Article
Correlation between Magnetocaloric Properties and Magnetic Exchange Interaction in Gd54Fe36B10−xSix Amorphous Alloys
by Huiyan Zhang, Jia Tan, Xue Zhang, Jiazhe Yan, Han Shi, Ye Zhu, Weizhong Cheng, Hailing Li, Weihuo Li and Ailin Xia
Materials 2023, 16(10), 3629; https://doi.org/10.3390/ma16103629 - 10 May 2023
Cited by 3 | Viewed by 1855
Abstract
Gd54Fe36B10−xSix (x = 0, 2, 5, 8, 10) amorphous ribbons were fabricated by melt-spinning technique. Based on the molecular field theory, the magnetic exchange interaction was analyzed by constructing the two-sublattice model and deriving [...] Read more.
Gd54Fe36B10−xSix (x = 0, 2, 5, 8, 10) amorphous ribbons were fabricated by melt-spinning technique. Based on the molecular field theory, the magnetic exchange interaction was analyzed by constructing the two-sublattice model and deriving the exchange constants JGdGd, JGdFe and JFeFe. It was revealed that appropriate substitution content of Si for B can improve the thermal stability, maximum magnetic entropy change and widened table-like magnetocaloric effect of the alloys, while excessive Si will lead to the split of the crystallization exothermal peak, inflection-like magnetic transition and deterioration of magnetocaloric properties. These phenomena are probably correlated to the stronger atomic interaction of Fe-Si than that of Fe-B, which induced the compositional fluctuation or localized heterogeneity and then caused the different way of electron transfer and nonlinear variation in magnetic exchange constants, magnetic transition behavior and magnetocaloric performance. This work analyzes the effect of exchange interaction on magnetocaloric properties of Gd-TM amorphous alloys in detail. Full article
(This article belongs to the Special Issue Advances in Amorphous Alloy)
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