Synthesis of a high-entropy (TiVCrMo)3AlC2 MAX and its tribological properties in a wide temperature range

Du, Zhi; Xue, Yaqing; Wang, Chuan‐Chao; Zeng, Qingfeng; Wang, Jinjin; Wang, Xiaomei; Xue, Lili; Yu, Hong

doi:10.1016/j.jeurceramsoc.2023.04.027

Cited by 10 publications

(2 citation statements)

References 43 publications

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“…Therefore, the study of M-site high-entropy MAX ceramics urgently needs to address three issues: (i) to ensure the type of solid solution elements (≥ 5) and sufficient solid solution content; (ii) to improve the purity of the high-entropy MAX phase; (iii) to understand the properties of the high-entropy MAX phase ceramics. As a member of the structural material family, medium-entropy designed MAX phases have been studied [30,31]; however, research on highentropy MAX phases has not been reported.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of high entropy (TiVNbTaM) ₂AlC (M = Zr, Hf) ceramics

Cao,

Zhang,

et al. 2024

Journal of Advanced Ceramics

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The high-entropy design of MAX phases is expected to confer superior properties, but its study was hindered by the complex synthesis method and limited purity of samples. In this work, two noteworthy types of high-entropy MAX phase structural ceramics, high-entropy (TiVNbTaM) 2 AlC (M = Zr, Hf), were designed and prepared by the in-situ synthesis using spark plasma sintering (SPS). The microstructure and lattice parameters of sintered samples were determined. Compared with the single-component MAX phases, the highly pure high-entropy (TiVNbTaZr) 2 AlC sample had good physical and mechanical properties, including electrical conductivity of 0.

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Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of high entropy (TiVNbTaM) ₂AlC (M = Zr, Hf) ceramics

Cao,

Zhang,

et al. 2024

Journal of Advanced Ceramics

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“…25 Mo doping was found to improve the lubricating properties and wear resistance of Ti 3 AlC 2 . 26 Additionally, highentropy structures based on Ti 3 AlC 2 such as (TiVCr-Mo) 3 AlC 2 27 and (Mo 0.25 Cr 0.25 Ti 0.25 V 0.25 ) 3 AlC 2 28 have also been prepared. Other investigations into metal doping of MAX phases, such as those focusing on bimetallic MAX phases like (Ti 1−y Nb y ) 2 AlC 29 and (Ti 1−x V x ) 2 AlC, 30 have further elucidated the structural and compositional effects of metal doping.…”

Section: Introductionmentioning

confidence: 99%

Maximizing Potential Applications of MAX Phases: Sustainable Synthesis of Multielement Ti₃AlC₂

Oliveira,

Amousa,

Subramani

et al. 2024

Inorg. Chem.

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This study employs the molten-salt-shielded method to dope the Ti 3 AlC 2 MAX phase with Nb and Mo, aiming to expand the intrinsic potential of the material. X-ray diffraction confirms the preservation of the hexagonal lattice structure of Ti 3 AlC 2 , while Raman and X-ray photoelectron spectroscopic analyses reveal the successful incorporation of dopants with subtle yet significant alterations in the vibrational modes and chemical environment. Scanning electron microscopy with energy-dispersive X-ray spectroscopy characterizations illustrate the characteristic layered morphology and uniform dopant distribution. Density functional theory simulations provide insights into the modified electronic structure, displaying changes in carrier transport mechanisms and potential increases in metallic conductivity, particularly when doping occurs at both the M and A sites. The computational findings are corroborated by the experimental results, suggesting that the enhanced material may possess improved properties for electronic applications. This comprehensive approach not only expands the MAX phase family but also tailors its functionality, which could allow for the production of hybrid materials with novel functionalities not present in the pristine form.

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Electrostatically Shielded Transportation Enabling Accelerated Na⁺ Diffusivity in High‐Performance Fluorophosphate Cathode for Sodium‐Ion Batteries

Wang,

Jing,

Wang

et al. 2024

Adv Funct Materials

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A typical polyanionic based material Na3V2(PO4)2O2F (Na3VPO2F) attracts much interest as a cathode for large‐scale sodium‐ion batteries in consideration of its stable structure and remarkable energy density. Nevertheless, the large coulombic attraction and repulsion suffered by the mobile Na+ from structural anions and surrounding Na+, respectively, result in a torpid reaction kinetics and inferior rate capability. Herein, Br−‐doped and Na+ vacancy preinstalled Na3−yVPO2−xBrxF is prepared to dilute the charges on and inside the Na+ transportation tunnel. In virtue of density functional theory analysis, Na3−yVPO2−xBrxF reveals a reduction in the bandgap and an increase in electronic conductivity. Meanwhile, the almost electrostatically shielded tunnel in Na3−yVPO2−xBrxF alleviates the coulombic hindrance imposed on Na+ during its (de)intercalation, which demonstrates a Na+ diffusivity about five times higher than that of Na3VPO2F. Consequently, the Na3−yVPO2−xBrxF cathode shows a superior rate capacity of 77.7 mAh g−1 under 50 C and great cycling property corresponding to a high capacity retention of 94.4% over 800 cycles at 10 C. The assembled Na3−yVPO2−xBrxF//hard‐carbon sodium‐ion full‐cell presents excellent specific energy/power (226 Wh kg−1@15424.2 W kg−1) as well as outstanding long‐term cyclic stability over 1000 cycles at 5 C.

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Synthesis of a high-entropy (TiVCrMo)3AlC2 MAX and its tribological properties in a wide temperature range

Cited by 10 publications

References 43 publications

Synthesis and characterization of high entropy (TiVNbTaM) ₂AlC (M = Zr, Hf) ceramics

Synthesis and characterization of high entropy (TiVNbTaM) ₂AlC (M = Zr, Hf) ceramics

Maximizing Potential Applications of MAX Phases: Sustainable Synthesis of Multielement Ti₃AlC₂

Electrostatically Shielded Transportation Enabling Accelerated Na⁺ Diffusivity in High‐Performance Fluorophosphate Cathode for Sodium‐Ion Batteries

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Synthesis of a high-entropy (TiVCrMo)3AlC2 MAX and its tribological properties in a wide temperature range

Cited by 10 publications

References 43 publications

Synthesis and characterization of high entropy (TiVNbTaM) 2AlC (M = Zr, Hf) ceramics

Synthesis and characterization of high entropy (TiVNbTaM) 2AlC (M = Zr, Hf) ceramics

Maximizing Potential Applications of MAX Phases: Sustainable Synthesis of Multielement Ti3AlC2

Electrostatically Shielded Transportation Enabling Accelerated Na+ Diffusivity in High‐Performance Fluorophosphate Cathode for Sodium‐Ion Batteries

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Synthesis and characterization of high entropy (TiVNbTaM) ₂AlC (M = Zr, Hf) ceramics

Synthesis and characterization of high entropy (TiVNbTaM) ₂AlC (M = Zr, Hf) ceramics

Maximizing Potential Applications of MAX Phases: Sustainable Synthesis of Multielement Ti₃AlC₂

Electrostatically Shielded Transportation Enabling Accelerated Na⁺ Diffusivity in High‐Performance Fluorophosphate Cathode for Sodium‐Ion Batteries