In situ atomic-scale observation of oxidation and decomposition processes in nanocrystalline alloys.

ABSTRACT: Oxygen contamination is a problem which inevitably occurs during severe plastic deformation of metallic powders by exposure to air. Although this contamination can change the morphology and properties of the consolidated materials, there is a lack of detailed information about the behavior of oxygen in nanocrystalline alloys. In this study, aberration-corrected high-resolution transmission electron microscopy and associated techniques are used to investigate the behavior of oxygen during in situ heating of highly strained Cu-Fe alloys. Contrary to expectations, oxide formation occurs prior to the decomposition of the metastable Cu-Fe solid solution. This oxide formation commences at relatively low temperatures, generating nanosized clusters of firstly CuO and later Fe2O3. The orientation r

SUBMITTER: Guo J 

PROVIDER: S-EPMC5838172 | biostudies-literature | 2018 Mar

REPOSITORIES: biostudies-literature