Quantitative three-dimensional imaging of chemical short-range order via machine learning enhanced atom probe tomography.

ABSTRACT: Chemical short-range order (CSRO) refers to atoms of specific elements self-organising within a disordered crystalline matrix to form particular atomic neighbourhoods. CSRO is typically characterized indirectly, using volume-averaged or through projection microscopy techniques that fail to capture the three-dimensional atomistic architectures. Here, we present a machine-learning enhanced approach to break the inherent resolution limits of atom probe tomography enabling three-dimensional imaging of multiple CSROs. We showcase our approach by addressing a long-standing question encountered in body-centred-cubic Fe-Al alloys that see anomalous property changes upon heat treatment. We use it to evidence non-statistical B₂-CSRO instead of the generally-expected D0₃-CSRO. W

SUBMITTER: Li Y 

PROVIDER: S-EPMC10654683 | biostudies-literature | 2023 Nov

REPOSITORIES: biostudies-literature