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学者姓名：蔡小强
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Abstract ：
The initial behavior of multi-principal element alloys (MPEAs) is crucial to understanding their deformation mechanism. However, its orientation dependence remains poorly understood. The initial plastic behavior of three typical crystal planes (100), (110) and (111) of FeNiCr MPEA was investigated by nanoindentation experiments, molecular dynamics (MD) simulations and density functional theory (DFT) calculations. Our novel findings reveal that the initial plastic behavior of FeNiCr MPEA is highly orientation-dependent. Specifically, the (111) plane has the highest initial yield load, and (110) plane exhibits the smallest width of displacement burst. This is related to the number of activated slip systems and the evolution behavior of dislocation structure under different crystal orientations. These differences would not lead to different incipient mechanisms and activation volumes. For the first time, MD simulations not only clarify that the dislocation nucleation load is the decisive factor for the initial yield load but also disclose that the incipient behavior of (111) orientation is more sensitive to the lattice distortion (LD). In addition, DFT results unravel that intrinsic LD promotes dislocation nucleation by triggering heterogeneous distribution of charge density. Finally, the orientation dependence of incipient behavior in FCC FeNiCr MPEA shares similarities with conventional metals and other FCC MPEAs, but differs from BCC MPEAs due to their distinct slip systems. The key findings of this paper deepen our understanding of the incipient behavior of MPEAs. © 2025 Elsevier Ltd
Keyword ：
Crystal lattices Crystal lattices Crystal orientation Crystal orientation Ternary alloys Ternary alloys
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| GB/T 7714 | Zhang, X.K. , Fan, J.T. , Xiang, H.L. et al. Unveiling the critical role of crystal orientation in the incipient behavior of FCC FeNiCr multi-principal element alloy [J]. | International Journal of Mechanical Sciences , 2025 , 297-298 . |
| MLA | Zhang, X.K. et al. "Unveiling the critical role of crystal orientation in the incipient behavior of FCC FeNiCr multi-principal element alloy" . | International Journal of Mechanical Sciences 297-298 (2025) . |
| APA | Zhang, X.K. , Fan, J.T. , Xiang, H.L. , Yan, J. , Li, W.P. , Zhao, W. et al. Unveiling the critical role of crystal orientation in the incipient behavior of FCC FeNiCr multi-principal element alloy . | International Journal of Mechanical Sciences , 2025 , 297-298 . |
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Abstract ：
The highly reversible plating/stripping of Zn is plagued by dendrite growth and side reactions on metallic Zn anodes, retarding the commercial application of aqueous Zn-ion batteries. Herein, a distinctive nano dual-phase diamond (NDPD) comprised of an amorphous-crystalline heterostructure is developed to regulate Zn deposition and mechanically block dendrite growth. The rich amorphous-crystalline heterointerfaces in the NDPD endow modified Zn anodes with enhanced Zn affinity and result in homogeneous nucleation. In addition, the unparalleled hardness of the NDPD effectively overcomes the high growth stress of dendrites and mechanically impedes their proliferation. Moreover, the hydrophobic surfaces of the NDPD facilitate the desolvation of hydrate Zn2+ and prevent water-mediated side reactions. Consequently, the Zn@NDPD presents an ultrastable lifespan exceeding 3200 h at 5 mA cm(-2) and 1 mAh cm(-2). The practical application potential of Zn@NDPD is further demonstrated in full cells. This work exhibits the great significance of a chemical-mechanical synergistic anode modification strategy in constructing high-performance aqueous Zn-ion batteries.
Keyword ：
amorphous-crystalline heterostructure amorphous-crystalline heterostructure aqueous batteries aqueous batteries mechanical and chemicalsynergism mechanical and chemicalsynergism nano dual-phase diamond nano dual-phase diamond Zn dendrites Zn dendrites
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| GB/T 7714 | Chen, Yuhan , Yin, Jianan , Zhang, Yaqin et al. Coupling High Hardness and Zn Affinity in Amorphous-Crystalline Diamond for Stable Zn Metal Anodes [J]. | ACS NANO , 2024 , 18 (22) : 14403-14413 . |
| MLA | Chen, Yuhan et al. "Coupling High Hardness and Zn Affinity in Amorphous-Crystalline Diamond for Stable Zn Metal Anodes" . | ACS NANO 18 . 22 (2024) : 14403-14413 . |
| APA | Chen, Yuhan , Yin, Jianan , Zhang, Yaqin , Lyu, Fucong , Qin, Bin , Zhou, Jingwen et al. Coupling High Hardness and Zn Affinity in Amorphous-Crystalline Diamond for Stable Zn Metal Anodes . | ACS NANO , 2024 , 18 (22) , 14403-14413 . |
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