@article{Chen2024, 
author = {Yimeng Chen and Manuel Legrée and Jean-Louis Bobet and Alexander Kvit},
title = {Scanning transmission electron microscopy and atom probe tomography analysis of non-stoichiometry long-period-stacking-ordered structures in Mg-Ni-Y/Sm alloys},
year = {2024},
journal = {Journal of Magnesium and Alloys},
volume = {12},
number = {3},
pages = {954-965},
keywords = {Magnesium alloys, Long-range ordering, Atom probe tomography (APT), STEM HAADF, Hydrolysis properties},
url = {https://www.sciopen.com/article/10.1016/j.jma.2024.03.001},
doi = {10.1016/j.jma.2024.03.001},
abstract = {The long-period-stacking-ordered (LPSO) structure affects the mechanical, corrosion and hydrolysis properties of Mg alloys. The current work employs high angle annular dark field-scanning transmission electron microscopy (HAADF-STEM) and atom probe tomography (APT) to investigate the structural and local chemical information of LPSO phases formed in Mg-Ni-Y/Sm ternary alloys after extended isothermal annealing. Depending on the alloying elements and their concentrations, Mg-Ni-Y/Sm develops a two-phase LPSO + α-Mg structure in which the LPSO phase contains defects, hybrid LPSO structure, and Mg insertions. HAADF-STEM and APT indicate non-stoichiometric LPSO with incomplete Ni6(Y/Sm)8 clusters. In addition, the APT quantitatively determines the local composition of LPSO and confirms the presence of Ni within the Mg bonding layers. These results provide insight into a better understanding of the structure and hydrolysis properties of LPSO-Mg alloys.}
}