Dynamics of the fcc-to-bcc phase transition in single-crystalline PdCu alloy nanoparticles.

ABSTRACT: Two most common crystal structures in metals and metal alloys are body-centered cubic (bcc) and face-centered cubic (fcc) structures. The phase transitions between these structures play an important role in the production of durable and functional metal alloys. Despite their technological significance, the details of such phase transitions are largely unknown because of the challenges associated with probing these processes. Here, we describe the nanoscopic details of an fcc-to-bcc phase transition in PdCu alloy nanoparticles (NPs) using in situ heating transmission electron microscopy. Our observations reveal that the bcc phase always nucleates from the edge of the fcc NP, and then propagates across the NP by forming a distinct few-atoms-wide coherent bcc-fcc interface. Notably, this inte

SUBMITTER: Jiang Y 

PROVIDER: S-EPMC9822937 | biostudies-literature | 2023 Jan

REPOSITORIES: biostudies-literature