Bamboo-like dual-phase nanostructured copper composite strengthened by amorphous boron framework.

ABSTRACT: Grain boundary engineering is a versatile tool for strengthening materials by tuning the composition and bonding structure at the interface of neighboring crystallites, and this method holds special significance for materials composed of small nanograins where the ultimate strength is dominated by grain boundary instead of dislocation motion. Here, we report a large strengthening of a nanocolumnar copper film that comprises columnar nanograins embedded in a bamboo-like boron framework synthesized by magnetron sputtering co-deposition, reaching the high nanoindentation hardness of 10.8 GPa among copper alloys. The boron framework surrounding copper nanograins stabilizes and strengthens the nanocolumnar copper film under indentation, benefiting from the high strength of the amorphous boron f

SUBMITTER: Lv H 

PROVIDER: S-EPMC10415290 | biostudies-literature | 2023 Aug

REPOSITORIES: biostudies-literature