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Unraveling the Interplay Between Interfacial Behavior and Performance in Nano-Al2O3/Al Composites via Electron Work Function (EWF) Methodology.

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Title: Unraveling the Interplay Between Interfacial Behavior and Performance in Nano-Al2O3/Al Composites via Electron Work Function (EWF) Methodology.
Authors: Yang, Zirun1 (AUTHOR) 123123953@163.com, Cai, Beibei1 (AUTHOR), Zhang, Huihui1,2 (AUTHOR), Lan, Hua1 (AUTHOR), Zhang, Kunyou1 (AUTHOR), Zhang, Xinjiang3 (AUTHOR), Li, Xinxing4 (AUTHOR) newstar1015@126.com, Luo, Bin5 (AUTHOR), Kumar, Aakash6 (AUTHOR), Li, Dongyang6 (AUTHOR)
Source: JOM: The Journal of The Minerals, Metals & Materials Society (TMS). Jul2026, Vol. 78 Issue 7, p6820-6831. 12p.
Subjects: Electron work function, Interface dynamics, Aluminum oxide composites, Electrolytic corrosion, Nanoparticles, Nanocomposite materials, Mechanical behavior of materials
Abstract: In nanoparticle-reinforced metal composites, material performance exhibits a non-monotonic dependence on reinforcement content, thus remaining inadequately explained by conventional macroscopic analysis. To address this, Al matrix composites were fabricated by varying Al2O3 nanoparticle content (5–35 wt.%) via direct current fast hot-pressing sintering (FHPs). Electron work function (EWF) analysis was employed to elucidate how reinforcement content affects the material interface and resulting properties. It was found that the optimal reinforcement content lies within 15–25 wt.%, where the composite achieves a balanced enhancement in compressive strength, hardness, wear, and cavitation erosion resistance. Nevertheless, at 35 wt.% Al2O3/Al composite, agglomeration of nanoparticles reduces interfacial integrity and promotes localized micro-galvanic corrosion, which compromises material properties. EWF analysis revealed that the addition of nano-Al2O3 particles enhanced the overall surface electromotive force of the composites. As the nano-Al2O3 particle content increased, localized particle aggregation occurred, which reduced the electromotive force at the interfaces and consequently had a detrimental effect on the overall contact potential performance of the composite. [ABSTRACT FROM AUTHOR]
Copyright of JOM: The Journal of The Minerals, Metals & Materials Society (TMS) is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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Abstract:In nanoparticle-reinforced metal composites, material performance exhibits a non-monotonic dependence on reinforcement content, thus remaining inadequately explained by conventional macroscopic analysis. To address this, Al matrix composites were fabricated by varying Al2O3 nanoparticle content (5–35 wt.%) via direct current fast hot-pressing sintering (FHPs). Electron work function (EWF) analysis was employed to elucidate how reinforcement content affects the material interface and resulting properties. It was found that the optimal reinforcement content lies within 15–25 wt.%, where the composite achieves a balanced enhancement in compressive strength, hardness, wear, and cavitation erosion resistance. Nevertheless, at 35 wt.% Al2O3/Al composite, agglomeration of nanoparticles reduces interfacial integrity and promotes localized micro-galvanic corrosion, which compromises material properties. EWF analysis revealed that the addition of nano-Al2O3 particles enhanced the overall surface electromotive force of the composites. As the nano-Al2O3 particle content increased, localized particle aggregation occurred, which reduced the electromotive force at the interfaces and consequently had a detrimental effect on the overall contact potential performance of the composite. [ABSTRACT FROM AUTHOR]
ISSN:10474838
DOI:10.1007/s11837-026-08380-9