Impact Factor:

7.5

DOI number:

10.1080/21663831.2022.2108349

Journal:

Materials Research Letters

Abstract:

Local thickening, resulting from displacive or diffusive mechanisms individually, is frequently observed in nanoscale metals during compression. However, it is not fully understood how a coupled displacive-diffusive mechanism would mediate the compressive deformation of metallic nanocrystal. Here, by conducting in situ atomic-scale compression tests, we find that, instead of local thickening commonly reported thus far, abnormal thinning events consecutively occur in silver nanocrystals, where preexisting dislocations and crystal slip serve as stimuli to activate surface atom diffusion. Below a critical width, tensile-fracture-like failure occurs in the silver nanocrystals. This work sheds light on atomic-scale diffusion-mediated compressive deformation of metallic nanocrystal.

Co-author:

Xiang Wang,Susheng Tan

First Author:

Sixue Zheng

Indexed by:

Journal paper

Correspondence Author:

Guofeng Wang, Scott X. Mao

Discipline:

Engineering

Document Type:

J

Volume:

10

Issue:

12

Page Number:

805-812

Translation or Not:

no

Date of Publication:

2022-08-06

Included Journals:

SCI

Links to published journals:

https://www.tandfonline.com/doi/full/10.1080/21663831.2022.2108349