Phase transformation and amorphization resistance in high-entropy MAX phase M2SnC (M = Ti, V, Nb, Zr, Hf) under in-situ ion irradiation

Zhao, Shuang; Chen, Lu; Xiao, Hao; Huang, Jia; Li, Yuxin; Qian, Yizhou; Zheng, Tao; Li, Youbing; Cao, Liuxuan; Zhang, Hui; Liu, Haochen; Wang, Yugang; Huang, Qing; Wang, Chenxu

doi:10.1016/j.actamat.2022.118222

Cited by 27 publications

(6 citation statements)

References 69 publications

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“…Furthermore, the (103) crystal plane tended to shift toward a lower angle. The alteration in the XRD structure suggests a reduced crystal lattice resulting from the substitution of Sn atoms with smaller Al atoms, which is consistent with previous findings. − The scanning electron microscopy (SEM) morphology of Ti 2 (Sn y Al 1– y )C (Figure b) resembled that of the Ti 2 AlC MAX phase (Figure S1a of the Supporting Information) and exhibited a smaller particle size. When 20 wt % Sn was added to the A site, the energy-dispersive spectroscopy (EDS) analysis revealed the presence of Ti, Sn, Al, and C elements in the product, with the EDS semiquantitative analysis indicating an atomic ratio of Ti/Sn/Al/C close to 2:0.2:0.8:1 (Figure S2 of the Supporting Information).…”

supporting

confidence: 89%

Dual-Phase Structure through Selective Etching of the Double A-Element MAX Phase in Lewis Acidic Molten Salts

Wei,

Chen,

Ding

et al. 2024

J. Phys. Chem. Lett.

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MXene materials with innovative properties and versatile applications have gained immense popularity among scientists. The green and environmentally friendly Lewis acid salt etching route has opened up immense possibilities for the advancement of 2D MXene materials. In this study, we precisely etched the Al element from the double A-element MAX phases Ti 2 (Sn y Al 1−y )C by employing Lewis molten salt guided by redox potentials. This approach led to the discovery of a novel Ti 2 Sn y CCl x dual-phase structure consisting of Ti 2 SnC and Ti 2 CCl x . We then established that the etching of the MAX phase via Lewis acid salt is facilitated by the oxidation of M-site elements, with the MX sublayer acting as an electron transmission conduit to enable the oxidation of A-site elements. This work is dedicated to unraveling the underlying mechanisms governing the etching processes using Lewis molten salt, thereby contributing to a more profound comprehension of these innovative etching routes.

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confidence: 89%

Dual-Phase Structure through Selective Etching of the Double A-Element MAX Phase in Lewis Acidic Molten Salts

Wei,

Chen,

Ding

et al. 2024

J. Phys. Chem. Lett.

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“…However, CCCs appear to have superior phase stability and resistance to amorphization and lattice expansion compared to the other compositionally complex ceramic families. For instance, (LuYEuGd) 2 Ti 2 O 7 compositionally complex pyrochlore oxide 41 and (TiVNbZrHf) 2 SnC MAX phase 42 irradiated with 800 keV Kr 2+ at room temperature exhibited amorphization at the critical dose of 0.26 and 0.87 dpa, respectively. Similarly, the (AlCrMoNbZr)N thin film irradiated with 400 keV He + with a peak dose of 2.7 dpa presented a mixture of crystalline and amorphous regions compared to the as-deposited film.…”

Section: A Phase Stabilitymentioning

confidence: 99%

Compositionally complex carbide ceramics: A perspective on irradiation damage

Trinh,

Wang,

Bawane

et al. 2024

Journal of Applied Physics

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Extensive experimental and computational studies have demonstrated outstanding physical and chemical properties of the novel materials of compositionally complex carbides (CCCs), enabling their promising applications in advanced fission and fusion energy systems. This perspective provides a comprehensive overview of radiation damage behavior reported in the literature to understand the fundamental mechanisms related to the impact of multi-principal metal components on phase stability, irradiation-induced defect clusters, irradiation hardening, and thermal conductivity of compositionally complex carbides. Several future research directions are recommended to critically evaluate the feasibility of designing and developing new ceramic materials for extreme environments using the transformative “multi-principal component” concept. Compared to the existing materials for nuclear applications including stainless steels, nickel alloys, ZrC, SiC, and potentially high-entropy alloys, as well as certain other compositionally complex ceramic families. CCCs appear to be more resistant to amorphization, growth of irradiation defect clusters, and void swelling.

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“…[ 6 , 7 ]. The range of the potential applications of HEAs is rather wide due to their excellent mechanical properties, as well as resistance to corrosion [ 8 ], heat [ 9 ] and radiation [ 10 ], biocompatibility [ 11 , 12 ], hydrogen storage capacity [ 13 ], etc. These features make HEAs stand out among the conventional alloys and also make them highly in demand in the production of metal–diamond composites for abrasive or thermoconductive needs.…”

Section: Introductionmentioning

confidence: 99%

Manufacturing of Metal–Diamond Composites with High-Strength CoCrCuxFeNi High-Entropy Alloy Used as a Binder

et al. 2023

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This paper focuses on the study of the structure and mechanical properties of CoCrCuxFeNi high-entropy alloys and their adhesion to single diamond crystals. CoCrCuxFeNi alloys were manufactured by the powder metallurgy route, specifically via mechanical alloying of elemental powders, followed by hot pressing. The addition of copper led to the formation of a dual-phase FCC + FCC2 structure. The CoCrCu0.5FeNi alloy exhibited the highest ultimate tensile strength (1080 MPa). Reductions in the ductility of the CoCrCuxFeNi HEAs and the tendency for brittle fracture behavior were observed at high copper concentrations. The equiatomic alloys CoCrFeNi and CoCrCuFeNi demonstrated high adhesion strength to single diamond crystals. The diamond surface at the fracture of the composites having the CoCrFeNi matrix had chromium-rich metal matrix regions, thus indicating that chromium carbide, responsible for adhesion, was formed at the composite–diamond interface. Copper-rich areas were detected on the diamond surface within the composites having the CoCrCuFeNi matrix due to the predominant precipitation of the FCC2 phase at the interfaces or the crack propagation along the FCC/FCC2 interface, resulting in the exposure of the Cu-rich FCC2 phase on the surface.

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Phase transformation and amorphization resistance in high-entropy MAX phase M2SnC (M = Ti, V, Nb, Zr, Hf) under in-situ ion irradiation

Cited by 27 publications

References 69 publications

Dual-Phase Structure through Selective Etching of the Double A-Element MAX Phase in Lewis Acidic Molten Salts

Dual-Phase Structure through Selective Etching of the Double A-Element MAX Phase in Lewis Acidic Molten Salts

Compositionally complex carbide ceramics: A perspective on irradiation damage

Manufacturing of Metal–Diamond Composites with High-Strength CoCrCuxFeNi High-Entropy Alloy Used as a Binder

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