Rare Metals最新文献_第3页

Unraveling the cryogenic formability in high entropy alloy sheets under complex stress conditions 揭示复杂应力条件下高熵合金板的低温成形性

IF 9.6 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Rare Metals

Pub Date : 2024-11-29 DOI: 10.1007/s12598-024-03075-z

Ke-Yan Wang, Zi-Jian Cheng, Zhi-Liang Ning, Hai-Ping Yu, Parthiban Ramasamy, Jürgen Eckert, Jian-Fei Sun, Alfonso H. W. Ngan, Yong-Jiang Huang

This work investigates how temperature and microstructural evolution affect the formability of face-centered cubic (fcc) structured CoCrFeNiMn_0.75Cu_0.25 high entropy alloy (HEA) sheets under complex stress conditions. Erichsen cupping tests were conducted to quantitatively evaluate the deformation capacity at room temperature (298 K) and cryogenic temperatures. The findings reveal a strong temperature dependence on the formability of the HEA. A decrease in the deformation temperature from 298 to 93 K causes a significant increase in both the Erichsen index (IE) (from 9.8 to 12.4 mm) and the expansion rate (δ) of surface area (from 51.6% to 76.3%), as well as a reduction in the average deviation (η) of thickness (from 55.1% to 44.4%), signifying its ultrahigh formability and uniform deformation capability at cryogenic temperature. This enhancement is attributed to the transition in the deformation mechanism from single dislocation slip at 298 K to a cooperative of plastic deformation mechanisms at 93 K, involving dislocation slip, stacking faults (SFs), Lomer-Cottrell (L-C) locks and multi-scale nanotwins. The lower stacking fault energy of the alloy facilitates these deformation mechanisms, particularly the formation of SFs and nanotwins, which enhance ductility and strength by providing additional pathways for plastic deformation. These mechanisms collectively contribute to delaying plastic instability, thereby improving the overall formability. This work provides a comprehensive understanding of the underlying reasons for the enhanced formability of HEAs at cryogenic temperatures, offering valuable insights for their practical use in challenging environments.

Graphical abstract

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引用次数: 0

A novel CoCrNi-based medium-entropy alloy self-lubricating composite with superior wear performance

IF 9.6 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Rare Metals

Pub Date : 2024-11-29 DOI: 10.1007/s12598-024-03067-z

Ming-Da Xie, Wen-Ting Ye, Qing Zhou, Lei Jia, Biao Chen, Meng-Qian Zhang, Hai-Feng Wang

CoCrNi medium-entropy alloy has demonstrated remarkable mechanical properties, suggesting its potential as a structural material. Nevertheless, the challenge lies in achieving an elusive combination of high hardness and inherent self-lubrication on the worn surface, which is crucial for attaining exceptional tribological performance in medium-entropy alloy (MEA). This study reports the preparation of a novel CoCrNi-based self-lubricating composite by powder metallurgy, which is reinforced simultaneously with Ag solid lubricating phase and SiC ceramic particles. During the sintering process, SiC decomposes to form high hardness in situ Cr₂₃C₆, enabling the composite to achieve high load-bearing capacity. During the sliding process, thick and dense Ag self-lubricating film is successfully achieved due to the mechanical and thermal effects. The protective tribo-layer effectively mitigates surface stress concentration induced by wear, thereby inhibiting surface coarsening and substantially enhancing the tribological performance. The results showed that compared with CoCrNi MEA, the wear rate and friction coefficient of CoCrNi/SiC/Ag composite are reduced by 88.1% and 32.8%, respectively, showing superior tribological properties over most MEA-based self-lubrication composites. This study further elucidates the wear mechanism of CoCrNi/SiC/Ag composite, providing a new strategy for developing self-lubricating materials with excellent comprehensive performance, which overcomes the inherent trade-off between wear resistance and lubrication.

Graphical abstract

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引用次数: 0

Chemical synthesis of Pt/rare-earth nanoalloys with exclusive ligand effect boosting oxygen electrocatalysis

IF 9.6 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Rare Metals

Pub Date : 2024-11-25 DOI: 10.1007/s12598-024-03059-z

Ya-Feng Zhang, Yan-Yan Zhao, Kai Ye, Yang Zhao, Si Zhou, Feng Yin

Pt–rare-earth (PtRE) alloys are considered to be highly promising catalysts for oxygen reduction reaction (ORR) in acidic electrolytes. However, the wet-chemical synthesis of PtRE nanoalloys still faces significant challenges. The precise reaction mechanism for ORR of these catalysts is still unclear on significant aspects involving the rate-determining step and the nature of the ligand effect. Herein, we report a class of solvothermal synthesis of PtRE (RE is Dy or La) nanoalloys. Such PtRE nanoalloys here are active and stable in acidic media, with both high mass activities enhanced by 2–5 times relative to commercial Pt/C catalyst and high stabilities indicative of the little activity decay and negligible structure change after 10,000 cycles. Density functional theory calculations firmly confirm that the ligand effect of RE elements accelerates an O–O bond scission and steers the rate-determining steps from OH* + H⁺ + e⁻ → H₂O (on pure Pt surface) to HOOH* + H⁺ + e⁻ → OH* + H₂O (on the PtRE nanoalloy surface) for the fast reaction kinetics, which could be fine-tuned by regulating the RE electronic structures and consequently endows the maximal rate of ORR catalysis with PtDy alloy catalysts.

Graphical abstract

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引用次数: 0

Kirkendall effect-assisted electrospinning porous FeCo/Zn@C nanofibers featuring well-dispersed FeCo nanoparticles for ultra-wide electromagnetic wave absorption

IF 9.6 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Rare Metals

Pub Date : 2024-11-22 DOI: 10.1007/s12598-024-02988-z

Qi-Hui Sun, Hao-Cheng Zhai, Yi-Fan Liu, Chun-Sheng Li, Jun-Wei Wang, Xian Jian, Nasir Mahmood

Ultra-wide absorption band and flexibility are needed in multi-scenario applications, however, current electromagnetic wave absorption materials (EMWAMs) are not capable enough to deliver due to rigid structure. Here, we have designed a porous flexible mat composed of Zn-doped carbon (Zn@C) nanofibers (NFs) having encapsulated uniformly dispersed FeCo nanoparticles (NPs) (FeCo/Zn@C) as ultra-wideband absorber. During the electrospinning, the Fe³⁺, Co²⁺ and Zn²⁺ are uniformly immobilized within the NFs nanocrystallization process. Subsequently, the Kirkendall effect is deployed to trigger the generation of FeCo NPs and porous framework under thermal annealing. The FeCo/Zn@C NFs effectively favor magnetic-dielectric synergies due to the coexistence of magnetic FeCo NPs and dielectric carbon components. One-dimensional porous fiber prolongs the attenuation path and enhances multi-scattering and reflection. While the FeCo NPs encapsulated in Zn-doped carbon NFs provide abundant dipole and interfacial polarization. These favorable factors synergistically enhance absorption performance, resulting in a reflection loss value of − 71.58 dB. Moreover, by varying the thickness of absorbers, effective absorption bandwidth spans from 4.26 to 18.00 GHz. Hence, this work offers innovative insights for fabricating advanced EMWAMs.

超宽吸收带和柔韧性在多场景应用中被需要，但目前的电磁波吸收材料由于固有的硬性结构而无法实现。在这里，我们设计了由锌掺杂碳(Zn@C)纳米纤维组成的多孔柔性垫，其封装均匀分散的FeCo纳米颗粒(FeCo/Zn@C)作为超宽带吸收剂。在静电纺丝过程中，Fe³⁺、Co²⁺和Zn²⁺在纳米晶化过程中被均匀固定。随后，在热退火条件下，利用柯肯达尔效应触发FeCo纳米颗粒和多孔骨架的生成。FeCo/Zn@C纳米纤维由于磁性FeCo纳米颗粒和介电特性的碳组分共存而有效地促进了磁-介电协同作用。一维多孔纤维延长了衰减路径，增强了多次散射和反射。包裹在锌掺杂碳纤维中的FeCo纳米颗粒则提供了丰富的偶极子和界面极化。这些有利因素协同提高了电磁波吸收性能，导致反射损耗值为-71.58 dB。此外，通过调节吸收层的厚度，有效吸收带宽在4.26–18.00 GHz之间。因此，这项工作为制造先进的电磁波吸收材料提供了创新的见解。

{"title":"Kirkendall effect-assisted electrospinning porous FeCo/Zn@C nanofibers featuring well-dispersed FeCo nanoparticles for ultra-wide electromagnetic wave absorption","authors":"Qi-Hui Sun, Hao-Cheng Zhai, Yi-Fan Liu, Chun-Sheng Li, Jun-Wei Wang, Xian Jian, Nasir Mahmood","doi":"10.1007/s12598-024-02988-z","DOIUrl":"10.1007/s12598-024-02988-z","url":null,"abstract":"<p>Ultra-wide absorption band and flexibility are needed in multi-scenario applications, however, current electromagnetic wave absorption materials (EMWAMs) are not capable enough to deliver due to rigid structure. Here, we have designed a porous flexible mat composed of Zn-doped carbon (Zn@C) nanofibers (NFs) having encapsulated uniformly dispersed FeCo nanoparticles (NPs) (FeCo/Zn@C) as ultra-wideband absorber. During the electrospinning, the Fe<sup>3+</sup>, Co<sup>2+</sup> and Zn<sup>2+</sup> are uniformly immobilized within the NFs nanocrystallization process. Subsequently, the Kirkendall effect is deployed to trigger the generation of FeCo NPs and porous framework under thermal annealing. The FeCo/Zn@C NFs effectively favor magnetic-dielectric synergies due to the coexistence of magnetic FeCo NPs and dielectric carbon components. One-dimensional porous fiber prolongs the attenuation path and enhances multi-scattering and reflection. While the FeCo NPs encapsulated in Zn-doped carbon NFs provide abundant dipole and interfacial polarization. These favorable factors synergistically enhance absorption performance, resulting in a reflection loss value of − 71.58 dB. Moreover, by varying the thickness of absorbers, effective absorption bandwidth spans from 4.26 to 18.00 GHz. Hence, this work offers innovative insights for fabricating advanced EMWAMs.</p><p>超宽吸收带和柔韧性在多场景应用中被需要，但目前的电磁波吸收材料由于固有的硬性结构而无法实现。在这里，我们设计了由锌掺杂碳(Zn@C)纳米纤维组成的多孔柔性垫，其封装均匀分散的FeCo纳米颗粒(FeCo/Zn@C)作为超宽带吸收剂。在静电纺丝过程中，Fe<sup>3+</sup>、Co<sup>2+</sup>和Zn<sup>2+</sup>在纳米晶化过程中被均匀固定。随后，在热退火条件下，利用柯肯达尔效应触发FeCo纳米颗粒和多孔骨架的生成。FeCo/Zn@C纳米纤维由于磁性FeCo纳米颗粒和介电特性的碳组分共存而有效地促进了磁-介电协同作用。一维多孔纤维延长了衰减路径，增强了多次散射和反射。包裹在锌掺杂碳纤维中的FeCo纳米颗粒则提供了丰富的偶极子和界面极化。这些有利因素协同提高了电磁波吸收性能，导致反射损耗值为-71.58 dB。此外，通过调节吸收层的厚度，有效吸收带宽在4.26–18.00 GHz之间。因此，这项工作为制造先进的电磁波吸收材料提供了创新的见解。</p>","PeriodicalId":749,"journal":{"name":"Rare Metals","volume":"44 3","pages":"1856 - 1868"},"PeriodicalIF":9.6,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143667994","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Synthesis of single-crystal two-dimensional α-Al2O3 via a precipitation-oxidation process

IF 9.6 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Rare Metals

Pub Date : 2024-11-18 DOI: 10.1007/s12598-024-03040-w

Xiao-Ming Tu, Chang-Qing Shen, Chun-Lin Liu, Fang-Zhu Qing, Xue-Song Li

The growth of single-crystal α-Al₂O₃ is crucial for a variety of applications in electronics and other fields, while the synthesis of its two-dimensional (2D) form is not easy due to the high activation energy. Here, we demonstrate the growth of single-crystal 2D α-Al₂O₃ by high temperature (high-T) annealing of Ni foils. Tens of micrometers of 2D α-Al₂O₃ flakes grow on the surface of Ni foils, which is attributed to the precipitation of Al atoms from the Ni foil bulk to its surface, followed by the oxidation of Al atoms on the surface. In principle, the Ni foil acts as a solvent, where diluted metal atoms precipitate onto the surface and react with oxygen from the atmosphere to grow single-crystal 2D metal oxides. Our findings may also provide a promising method for synthesizing other single-crystal 2D metal oxides.

Graphical Abstract

引用次数: 0

A ZnFeNiCoCr high-entropy alloy for efficient bifunctional oxygen electrocatalysis

IF 9.6 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Rare Metals

Pub Date : 2024-11-18 DOI: 10.1007/s12598-024-03079-9

Juan Li, Bing Li, Pei-Tong Li, Ning Zhang, Hui-Shan Shang

The dearth of efficacious and economic bifunctional oxygen electrocatalysts has constituted a significant impediment to the actual implementation of high-performance metal-air batteries. Here, we construct an efficacious bifunctional oxygen electrocatalyst ZnFeNiCoCr high-entropy alloy (HEA) nanoparticles for oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) using a facile sol–gel strategy. The synthesized ZnFeNiCoCr HEA exhibits excellent bifunctional properties due to the synergistic effect between the metal elements. The overpotential of 305 mV at 10 mA·cm⁻² for OER and a half-wave potential of 0.864 V for ORR, which is excellent to that of commercial RuO₂ and Pt/C. Consequently, ZnFeNiCoCr HEA is utilized as a cathode catalyst for zinc-air batteries. The specific capacity of a zinc-air battery based on this HEA is 743 mAh·g⁻¹ and the battery undergoes a continuous charge/discharge cycle for over 400 h. The ZnFeNiCoCr HEA catalyst holds significant application potential in diverse electrochemical energy storage and conversion devices.

Graphical abstract

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引用次数: 0

Modification strategies of molybdenum sulfide towards practical high-performance lithium-sulfur batteries: a review

IF 9.6 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Rare Metals

Pub Date : 2024-11-18 DOI: 10.1007/s12598-024-03033-9

Xin Xu, Yan Guo, Hua-Jun Zhao, Yi-Ke Huang, Jun-Po Guo, Huai-Yu Shao

Lithium-sulfur batteries (LSBs) have undoubtedly become one of the most promising battery systems due to their high energy density and the cost-effectiveness of sulfur cathodes. However, challenges, such as the shuttle effect from soluble long-chain lithium polysulfides (LiPSs) and the low conductivity of active materials, hinder their commercialization. Under this circumstance, molybdenum sulfide (MoS₂) has attracted widespread attention due to its unique physicochemical properties, particularly its capability to mitigate the shuttle effect in LSBs through electrostatic or chemical bonds. Nonetheless, the industrial application of MoS₂ in LSBs is limited by the inertness of its basal surface and inadequate electron transfer properties. This review mainly introduces various modification strategies of MoS₂ materials in LSBs and their effects on electrochemical and catalytic performance. Unlike previous reviews and related papers, detailed discussions were conducted on the specific mechanisms of each modification strategy, including (1) shape manipulation, (2) support engineering, (3) heterostructure engineering, (4) defect engineering, (5) interlayer engineering, (6) phase engineering, (7) strain engineering, (8) hybridization. Comprehensive conclusions and outlook on the development of MoS₂ as an abundant electrocatalyst for LSBs are also discussed in the end.

Graphical abstract

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引用次数: 0

Comparative enhancement of H+ and OH− treatment on electromagnetic interference shielding in aligned and compact Ti3C2Tx MXene film

IF 9.6 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Rare Metals

Pub Date : 2024-11-16 DOI: 10.1007/s12598-024-03045-5

Zhao-Yang Li, Wei-Jun Zhao, Yu Sun, Bing Zhou, Yue-Zhan Feng, Chun-Tai Liu

The pressing demand for ultrathin and flexible shields to counter electromagnetic interference (EMI) has sparked interest in Ti₃C₂T_x MXene materials due to their exceptional electrical conductivity, tunable surface chemistry, and layered structure. However, pure Ti₃C₂T_x MXene films often lack the mechanical properties required for practical engineering applications, and traditional reinforcement methods tend to reduce electrical conductivity. This work demonstrates an effective strategy to enhance the alignment and densely packed layered structure of Ti₃C₂T_x MXene films by regulating the acidity and alkalinity of Ti₃C₂T_x MXene aqueous solutions. This approach simultaneously improves mechanical strength and electromagnetic interference shielding effectiveness (EMI SE). Compared with original Ti₃C₂T_x MXene films, MXene films modified with ammonia solution (NH₃·H₂O) via OH⁻ show a significant improvement in tensile strength (27.7 ± 1.9 MPa). Meanwhile, MXene films treated with hydrochloric acid (HCl) via H⁺ reach an even higher tensile strength of 39 ± 1.5 MPa. Moreover, the EMI SE values of the treated MXene films increase significantly, each reaching 66.2 and 58.4 dB. The maximum improvements in EMI SE values for the acid- and alkali-treated samples are 17.9% and 4%, respectively. In conclusion, the simultaneous enhancement of mechanical strength and EMI shielding efficacy highlights the potential of acid- and alkali-treated Ti₃C₂T_x MXene films for applications in ultrathin and flexible EMI shielding materials.

{"title":"Comparative enhancement of H+ and OH− treatment on electromagnetic interference shielding in aligned and compact Ti3C2Tx MXene film","authors":"Zhao-Yang Li, Wei-Jun Zhao, Yu Sun, Bing Zhou, Yue-Zhan Feng, Chun-Tai Liu","doi":"10.1007/s12598-024-03045-5","DOIUrl":"10.1007/s12598-024-03045-5","url":null,"abstract":"<p>The pressing demand for ultrathin and flexible shields to counter electromagnetic interference (EMI) has sparked interest in Ti<sub>3</sub>C<sub>2</sub>T<sub><i>x</i></sub> MXene materials due to their exceptional electrical conductivity, tunable surface chemistry, and layered structure. However, pure Ti<sub>3</sub>C<sub>2</sub>T<sub><i>x</i></sub> MXene films often lack the mechanical properties required for practical engineering applications, and traditional reinforcement methods tend to reduce electrical conductivity. This work demonstrates an effective strategy to enhance the alignment and densely packed layered structure of Ti<sub>3</sub>C<sub>2</sub>T<sub><i>x</i></sub> MXene films by regulating the acidity and alkalinity of Ti<sub>3</sub>C<sub>2</sub>T<sub><i>x</i></sub> MXene aqueous solutions. This approach simultaneously improves mechanical strength and electromagnetic interference shielding effectiveness (EMI SE). Compared with original Ti<sub>3</sub>C<sub>2</sub>T<sub><i>x</i></sub> MXene films, MXene films modified with ammonia solution (NH<sub>3</sub>·H<sub>2</sub>O) via OH<sup>−</sup> show a significant improvement in tensile strength (27.7 ± 1.9 MPa). Meanwhile, MXene films treated with hydrochloric acid (HCl) via H<sup>+</sup> reach an even higher tensile strength of 39 ± 1.5 MPa. Moreover, the EMI SE values of the treated MXene films increase significantly, each reaching 66.2 and 58.4 dB. The maximum improvements in EMI SE values for the acid- and alkali-treated samples are 17.9% and 4%, respectively. In conclusion, the simultaneous enhancement of mechanical strength and EMI shielding efficacy highlights the potential of acid- and alkali-treated Ti<sub>3</sub>C<sub>2</sub>T<sub><i>x</i></sub> MXene films for applications in ultrathin and flexible EMI shielding materials.</p>","PeriodicalId":749,"journal":{"name":"Rare Metals","volume":"44 3","pages":"1833 - 1843"},"PeriodicalIF":9.6,"publicationDate":"2024-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s12598-024-03045-5.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143668320","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Unlocking the structure and anion synergistic modulation of MoSe2 anode for ultra-stable and high-rate sodium-ion storage

IF 9.6 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Rare Metals

Pub Date : 2024-11-15 DOI: 10.1007/s12598-024-03041-9

Kang Xu, Yu-Hui Li, Xin Wang, Yu-Peng Cao, Shuo-Tong Wang, Liang Cao, Qi-Tu Zhang, Zhe-Fei Wang, Jun Yang

The two-dimensional MoSe₂ possesses a large interlayer spacing (0.65 nm) and a narrow bandgap (1.1 eV), showing potential in sodium-ion storage. However, it faces slow kinetics and volume stress during Na⁺ (de)intercalation process, thereby affecting the cycling stability and lifespan of sodium-ion batteries (SIBs). In this work, a novel approach involving anionic doping and structural design has been proposed, wherein a two-step in-situ selenization and surface thermal annealing doping process is applied to fabricate a novel configuration material of fluorine-doped MoSe₂@nitrogen-doped carbon nanosheets (F-MoSe₂@FNC). The obtained F-MoSe₂@FNC, benefiting from the dual advantages of structure and F-doping, synergistically promotes and accelerates the stable (de)intercalation of Na⁺. Henceforth, F-MoSe₂@FNC demonstrates notable characteristics in terms of reversible specific capacity, boasting a high initial coulombic efficiency of 76.97%, alongside remarkable rate capabilities and cyclic stability. The constructed F-MoSe₂@FNC anode-based half cell manifests exceptional longevity, enduring up to 2550 cycles at 10 A·g⁻¹ with a specific capacity of 322.04 mAh·g⁻¹. Its electrochemical performance surpasses that of MoSe₂@NC and Pure MoSe₂, underscoring the significance of the proposed synergistic modulation. Through comprehensive kinetic analyses, encompassing in-situ electrochemical impedance spectroscopy (EIS), it is elucidated that the F-MoSe₂@FNC electrode showcases elevated pseudo-capacitance and rapid diffusion attributes during charge and discharge processes. Furthermore, the assembled full-cell (F-MoSe₂@FNC//Na₃V₂(PO₄)₃) attains a notable energy density of 166.94 Wh·kg⁻¹. This design provides insights for the optimization of MoSe₂ electrodes and their applications in SIBs.

Graphical abstract

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引用次数: 0

Achieving ultrahigh-specific strength and enhanced GFA in Ti-based bulk metallic glasses via a two-step alloying strategy

IF 9.6 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Rare Metals

Pub Date : 2024-11-13 DOI: 10.1007/s12598-024-03036-6

Heng-Tong Bu, Jia-Lun Gu, Yun-Shuai Su, Yang Shao, Ke-Fu Yao

Ti-based bulk metallic glasses (BMGs) have attracted increasing attention due to their high specific strength. However, a fundamental conflict exists between the specific strength and glass-forming ability (GFA) of Ti-based BMGs, restricting their commercial applications significantly. In this study, this challenge was addressed by introducing a two-step alloying strategy to mitigate the remarkable density increment effect associated with heavy alloying elements required for enhancing the GFA. Consequently, through two-step alloying with Al and Fe in sequence, simultaneous enhancements in specific strength and GFA were achieved based on a Ti–Zr–Be ternary metallic glass, resulting in the development of a series of centimeter-sized metallic glasses exhibiting ultrahigh-specific strength. Notably, the newly developed (Ti₄₅Zr₂₀Be₃₁Al₄)₉₄Fe₆ alloy established a new record for the specific strength of Ti-based BMGs. Along with a critical diameter (D_c) of 10 mm, it offers the optimal scheme for balancing the specific strength and GFA of Ti-based BMGs. The present results further brighten the application prospects of Ti-based BMGs as lightweight materials.

Graphical abstract

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引用次数: 0