Download file (16.6MB)
Download as zip (14.5MB)

コレクション

引用

説明:

Hybrid physical vapour/atomic layer deposition technology has enabled the formation of nanolaminated Al100−zNiz/AlOxHy (bilayer period: 25/1 nm, z = 0, 2, and 5 at.%) thin films, introducing a novel interface-engineered design strategy with advanced microstructure control. This leverages dual-route tailoring of nanocrystalline Al through 1) compositional grain boundary engineering (Al100−zNiz) and 2) well-defined crystalline / amorphous interfaces (Al100−zNiz/AlOxHy). As ambient plasticity is thought to be governed by dislocation interactions with segregation-modified interfaces & lattice, elucidating the collective role of such barriers in strengthening is essential for establishing a robust design framework.
Accordingly, high-resolution analyses by scanning transmission electron microscopy (STEM) and atom probe tomography (APT) established a direct link between enhanced hardness and distinct nanostructural features. The nanolaminated Al95Ni5 / AlOxHy thin film here exhibits Ni-rich nanoclusters embedded in a sub-10 nm FCC Al matrix and smooth ∼1 nm amorphous interlayers. Notably, STEM indicated Ni decorating vertical Al grain boundaries, whereas APT reveals these to be distinct Ni-rich nanoclusters. Nanoindentation measurements confirmed hardness of 5.3 GPa for Al95Ni5/AlOxHy versus 2.7 GPa for Al/AlOxHy. Calculations showed that comparable strengthening magnitudes originate from both aspects of the dual-route tailored nanostructure: impeding dislocation motion by combined crystalline–amorphous layer confined slip and finely dispersed nanoclusters.

権利情報:

• Creative Commons BY Attribution 4.0 International
  

キーワード: Nanolaminated aluminium, Interface-engineering, Hybrid PVD-ALD, Nanoclusters, Crystalline/amorphous interface, Nanoindentation

刊行年月日: 2026-01-30

出版者: Elsevier BV

掲載誌:

• Materials & Design (ISSN: 02641275) vol. 263 115580

研究助成金:

• Japan Society for the Promotion of Science 24K23036
• Deutsche Forschungsgemeinschaft 409476157
• Deutsche Forschungsgemeinschaft SFB 1394
• Innosuisse Swiss Innovation Agency 109.352.1

原稿種別: 出版者版 (Version of record)

MDR DOI:

公開URL: https://doi.org/10.1016/j.matdes.2026.115580

関連資料:

その他の識別子:

連絡先:

更新時刻: 2026-04-10 18:08:28 +0900

MDRでの公開時刻: 2026-04-13 10:23:10 +0900